Quick Answer
Smoke cleansing - burning aromatic plants to shift the energy of a space - is one of humanity's oldest ritual practices, documented across Vedic, Egyptian, Indigenous North American, Japanese, Celtic, and Christian traditions. For home use: open windows, light a dried herb bundle until it smolders, move clockwise through your space with clear intention, and extinguish the bundle completely in sand afterward. Before you buy white sage, read the ethical sourcing section - most commercially sold white sage has been illegally poached from Southern California habitats.
Last updated: March 15, 2026
Key Takeaways
- Smudging is a specific Indigenous North American ceremony with cultural protocols; the broader practice of burning aromatic plants is called smoke cleansing and appears across dozens of unrelated world cultures
- A 2007 study showing burning Vedic herbal mixtures reduced airborne bacteria by 94% is widely misrepresented online as proof that burning sage purifies the air - the study did not use white sage (Salvia apiana)
- The California Native Plant Society reports that 50% of wild white sage populations have already been lost to urbanization; metric tons are poached annually to supply commercial demand
- Palo santo (Bursera graveolens) is classified as "Least Concern" by the IUCN - it is not the endangered species sometimes claimed
- Sustainable alternatives to white sage include common culinary sage (Salvia officinalis), rosemary, lavender, juniper, and locally grown herbs aligned with your own ancestral traditions
Smudging vs. Smoke Cleansing: An Important Distinction
The word "smudging" has entered mainstream wellness culture carrying a specific connotation - burning sage or other herbs to clear negative energy from a space. But the word itself refers to something more specific: a ceremonial spiritual practice used by Indigenous peoples of North America that involves sacred protocols, prayers, and a relationship with specific plant medicines embedded in particular cultural and spiritual systems.
Smudging ceremonies vary by nation and tradition. In Anishinaabe and Ojibwe traditions, the four sacred medicines most commonly used are sweetgrass, sage, cedar, and tobacco, and the ceremony is conducted with specific intentions and protocols for how the smoke is directed and how participants engage with it. The Lakota, Cree, Blackfoot, Navajo, and hundreds of other Indigenous nations have their own distinct traditions.
Smoke cleansing is the broader term - one that encompasses the global, cross-cultural human practice of burning aromatic plants for purification, prayer, healing, and spiritual connection. Smoke cleansing appears in Vedic India, ancient Egypt, medieval Europe, Japan, China, and countless other traditions, each with its own plants, intentions, and protocols. When non-Indigenous people burn herbs for cleansing purposes, calling it smoke cleansing acknowledges the global nature of the practice without appropriating the specific term and ceremony of smudging.
Some Indigenous teachers are willing to share smudging practices with non-Indigenous people who approach with genuine respect and acknowledgment of origins. Others consider the practice not open to outsiders at all, particularly given the historical suppression of Indigenous ceremonies and the current commercialization of sacred plants. The most respectful path is to learn directly from Indigenous teachers, acknowledge the tradition's origins, support Indigenous-owned businesses, and use the term smoke cleansing unless you have received specific guidance otherwise.
The Global History of Smoke Cleansing
The burning of aromatic plants and resins for spiritual and practical purposes is one of humanity's most widely documented ancient practices. Its appearance across completely unrelated cultures suggests it responds to something fundamental in human experience - the visible physicality of rising smoke as prayer or intention, the altered sensory state produced by particular aromatic compounds, and the sense of ritual transformation that concentrated, purposeful action creates.
Vedic India: Havan (also called homa) is among the oldest documented fire ritual traditions. Archaeological evidence of Vedic fire ceremonies dates to approximately 3000 BCE. The Sanskrit word havana means "to offer oblations." The practice is described extensively in the Vedas, among the oldest written texts known to scholarship. Havan samagri - the specific mixture of mango wood, ghee, grains, and medicinal herbs used in Vedic ceremonies - has been studied for its effects on indoor air quality, a subject we will return to in the science section.
Ancient Egypt and the Mediterranean: Frankincense and myrrh were burned in Egyptian temples and in funerary practices for thousands of years. Censers of terra-cotta and metal appear across Egyptian, Mesopotamian, Greek, and Roman archaeological contexts. The trade routes that carried frankincense from Boswellia trees in the Arabian Peninsula and East Africa to Mediterranean civilizations were among antiquity's most economically significant.
Catholic and Christian tradition: The thurible - a metal incense burner suspended on chains and swung during liturgical worship - has been used in Christian practice since at least the 4th century. Emperor Constantine donated thuribles to the Church of San Giovanni in Laterano in Rome, the earliest documented liturgical use. The symbolism was explicit: smoke rising toward the ceiling represented prayers ascending to God. Most commonly, frankincense and myrrh were burned - the same aromatics brought as gifts by the Magi in the nativity narrative.
Japanese kodo: Kodo, or "the Way of Incense," developed as a formal contemplative art during Japan's Muromachi period (1338-1573), though incense had arrived in Japan much earlier with the introduction of Buddhism. Kodo practitioners speak of "listening" to fragrance (monko in Japanese). In classical kodo practice, fragrant wood such as agarwood is placed on a mica plate over smoldering coals but not directly burned - the heat releases aromatic compounds through indirect warming. Kodo was ranked alongside the tea ceremony and flower arrangement as one of Japan's three classical arts.
Celtic and Scottish tradition: Saining is an age-old Celtic practice of burning local aromatic plants - juniper, rosemary, heather - for purification and protection. Scottish saining traditions have been documented in historical records and offer non-Indigenous Westerners an ancestral smoke cleansing tradition they can draw on without cultural appropriation concerns.
Mesoamerican traditions: Copal, a resin from Protium and Bursera trees native to Central and South America, was and continues to be burned in Mayan and Aztec ceremonial contexts. The aromatic smoke was understood to carry prayers to the divine and to cleanse spaces and participants before ritual. Copal continues to be used in Day of the Dead ceremonies and other contemporary Indigenous practices.
White Sage: The Plant, Its Culture, and the Crisis
White sage (Salvia apiana) grows only in a narrow geographic range: the coastal sage scrub and chaparral habitat of Southern California and northern Baja California. It is endemic to this region - it does not occur elsewhere naturally, and it cannot be authentically wildcrafted from any other location. The plant is sacred to the Kumeyaay, Luiseño, Cupeño, Cahuilla, Chumash, Kiliwa, and other Indigenous peoples of this specific region, who have maintained relationships with it across generations.
For the Cahuilla people, white sage was not solely a ceremonial plant. Large quantities of white sage seeds were traditionally harvested, mixed with wheat flour and sugar, and made into pinole - a nutritious gruel and biscuit - making it a food plant as well as a sacred one. A tea made from white sage roots was used by Cahuilla women for healing and strength following childbirth. This depth of relationship with the plant - culinary, medicinal, ceremonial - is the context in which "smudging" with white sage carries meaning.
The commercialization of white sage has created a severe conservation crisis. The California Native Plant Society (CNPS) reports that 50% of wild white sage populations have already been lost to urbanization, habitat conversion, and invasive species. On top of this existing pressure, the explosion of global demand for white sage smudge sticks has driven massive illegal harvesting from public and private lands in California and Baja California.
Documented poaching operations have stripped hillsides bare using chains stretched between vehicles to tear out entire plant populations at once. The CNPS estimates tens of thousands of pounds are removed from Southern California habitats annually. Because there are almost no large-scale commercial farms growing Salvia apiana, and because the plant is slow to establish, the vast majority of white sage bundles on the commercial market are wild-harvested - and most of that wildcrafting is illegal poaching.
If you buy a white sage smudge bundle from an unvetted online retailer or a generic wellness shop, the odds that it was legally and sustainably sourced are very low. The CNPS has partnered with Indigenous advocates Rose Ramirez and Deborah Small to produce a documentary called Saging the World to raise public awareness of this crisis.
What Does the Science Actually Say?
Online discussions of smudging frequently cite scientific research in ways that require careful fact-checking. Understanding what the research actually shows - and does not show - is essential for anyone who values evidence-informed decision-making alongside spiritual practice.
The most widely cited piece of research is a 2007 study by Nautiyal, Chauhan, and Nene published in the Journal of Ethnopharmacology. The study found that burning havan samagri - a traditional Vedic mixture of mango wood, ghee, grains, and medicinal herbs - in a closed room for one hour reduced airborne bacterial counts by more than 94%. Bacteria remained significantly reduced for up to 30 days afterward.
This is genuinely interesting research. However, it is routinely misrepresented online as evidence that burning white sage purifies the air. The study did not test white sage (Salvia apiana). Havan samagri is a complex mixture of plants entirely different from North American sage. Science Feedback and Snopes have both specifically fact-checked and identified this misrepresentation as widespread across wellness media.
A separate 2006 review by Mohagheghzadeh and colleagues in the same journal surveyed medicinal smoke use across 50 countries and 265 plant species - establishing that humanity has an extensive global tradition of using smoke for medical and therapeutic purposes. This was a review of ethnopharmacological literature, not an experiment testing specific outcomes.
Research on Salvia officinalis (common culinary sage) has identified several compounds with documented antimicrobial properties: 1,8-cineole (eucalyptol), camphor, thujone, and borneol. These compounds show laboratory activity against pathogens including Staphylococcus aureus and Escherichia coli. A 2016 study from the University of Mississippi found that flavonoid compounds in sage may activate CB1 receptors in the brain, with potential anti-anxiety effects.
What the science does not currently establish is that burning white sage specifically - or any sage - meaningfully reduces airborne pathogens under normal home conditions. The Dean of Yale School of Public Health has described the proposed antibacterial benefits of burning sage as "highly controversial," noting that breathing in smoke carries known harms including exposure to volatile organic compounds (VOCs) that can react with indoor ozone to produce formaldehyde and fine particulate matter.
A fair summary of the science: burning aromatic plants has a long history of being used for health purposes, some plant compounds show antimicrobial activity in laboratory settings, ritual practice has measurable psychological effects on wellbeing, and the specific claim that burning white sage kills airborne bacteria in your home is not substantiated by current research.
Palo Santo, Frankincense, and Other Plants
Several other aromatic materials are commonly used alongside or as alternatives to white sage. Understanding their origins helps in making informed choices.
Palo santo (Bursera graveolens) means "holy wood" in Spanish. The species belongs to the Burseraceae family - the same botanical family as frankincense and myrrh - and grows in tropical dry forests of Ecuador, Peru, and other South American countries. Indigenous peoples of these regions have traditionally harvested fallen branches and twigs, not live trees, for burning as incense. The aromatic smoke is used for spiritual purification and healing purposes.
There is significant confusion in the marketplace about palo santo's conservation status. Bursera graveolens - the species used for incense - was assessed by the IUCN in 2019 as "Least Concern." A different species sometimes also called palo santo, Bulnesia sarmientoi, is threatened with over-exploitation. Sustainable palo santo should come from suppliers who document that wood is harvested from naturally fallen trees; Ecuador has active reforestation programs that transplant seedlings from overpopulated areas. The greater ecological threat to B. graveolens is the destruction of tropical dry forest habitat for cattle ranching and development, not incense production itself.
Frankincense is the dried resin of Boswellia trees (Boswellia sacra and related species) native to the Arabian Peninsula, East Africa, and northwestern India. It has been used in religious ceremonies across Hindu, Buddhist, Jewish, Christian, and Islamic traditions for thousands of years. Frankincense trade was one of antiquity's most valuable commerce streams - the Incense Route connected South Arabia to Mediterranean markets over 2,000 years ago. Modern botanical research has identified anti-inflammatory compounds including boswellic acids in frankincense resin.
Copal is a resin from trees in the Protium and Bursera genera native to Central and South America. It has been used in Mayan and Aztec ceremonial contexts for thousands of years and remains in active use in contemporary Mesoamerican Indigenous practice. Copal contains a- and b-pinene, compounds with documented antiseptic properties.
Cedar, used in various North American traditions, is considered a protective and purifying plant. Sweetgrass (Hierochloe odorata), with its distinctive vanilla-like scent, is considered a sacred medicine in several North American traditions and is usually braided before drying and burning. Both are among the four sacred medicines most commonly referenced in the North American smudging traditions.
| Plant | Cultural Origin | Notes |
|---|---|---|
| White sage (Salvia apiana) | Indigenous North America (SW California, Baja CA) | Sacred; at-risk from poaching; source carefully |
| Common sage (Salvia officinalis) | Mediterranean Europe | Widely cultivated; sustainable; similar compounds |
| Palo santo (Bursera graveolens) | South America (Peru, Ecuador) | IUCN Least Concern; harvest fallen wood only |
| Frankincense (Boswellia sacra) | Arabia, East Africa, India | Cross-cultural; extensive historical documentation |
| Copal (Protium/Bursera species) | Mesoamerica (Mayan, Aztec) | Sacred resin; active in contemporary Indigenous use |
| Rosemary (Salvia rosmarinus) | Mediterranean Europe | Non-sacred; historically burned in hospitals; widely available |
| Juniper (Juniperus species) | Northern Europe, some North American traditions | Celtic/Scottish saining tradition; widely available |
How to Cleanse Your Home: Step by Step
The mechanics of smoke cleansing a home are straightforward. The quality of the practice comes from the intention and attention you bring to it, not from following a rigid script.
Preparation: Before you begin, take a few minutes to clarify your intention. What are you wanting to release or clear? What are you wanting to welcome or establish? Hold this in mind throughout the process. Have your herbs, a non-flammable vessel (abalone shell, ceramic dish, cast iron bowl), a lighter or matches, and a small amount of sand or dry soil ready. Have water nearby as a precaution.
Open the space: Open windows and at least one exterior door before you begin. This serves two purposes: practical ventilation to prevent smoke buildup and, in the symbolic logic of the practice, providing a pathway for what you are clearing to leave the space. Smoke that has nowhere to go does not cleanse - it just accumulates.
Light the herbs: Hold the tip of your herb bundle over a flame for 10 to 15 seconds until it catches, then gently blow out the flame so it smolders. The goal is a steady, slow burn that produces consistent smoke without open flame. If the bundle goes out during the process, simply re-light it.
Move through the space: Starting at the main entrance door, move clockwise through the space. The clockwise direction follows the path of the sun and is traditional in several cleansing practices, though you should work in whatever way feels natural to you. Hold the smoldering bundle over your non-flammable vessel to catch any falling ash.
Work with intention in each room: In each room, spend time at corners and any areas that feel heavy or stagnant. Use your hand, a feather, or a fan to direct smoke into corners, along walls, into closets and cupboards, and around windows and doors. Narrating your intention quietly or internally as you work - "I release what no longer serves this space" or equivalent - keeps your attention on the purpose of the practice rather than allowing it to become mechanical.
Extinguish completely: When you have finished moving through the space, press the smoldering tip of the bundle firmly into sand or dry soil in your vessel to extinguish it fully. Do not leave a smoldering bundle unattended. Do not assume it has gone out on its own - press it firmly and check that no ember remains.
Ash disposal: Allow ash to cool completely before handling. Many practitioners scatter cooled ash outdoors or add it to garden soil, returning the plant material to the earth. Avoid disposing of ash in sealed containers that trap residual heat.
Fire Safety and Practical Precautions
Burning anything in an enclosed space carries real risks that no amount of spiritual intention mitigates. Several practical considerations apply.
Ventilation is not optional. Burning aromatic plants produces smoke that contains fine particulate matter, carbon monoxide, and VOCs. In a sealed room, these accumulate to levels that can irritate airways and worsen conditions like asthma. If smoke builds up to the point of making your eyes water or throat itch, open more windows. People with respiratory conditions, infants, children, pregnant women, and pets should not be present during smoke cleansing.
Keep fire safety tools available. Have water within reach. Know where your nearest exit is. Never walk away from a smoldering bundle. If you are cleansing a room with a smoke detector, be prepared for it to trigger - this is not a malfunction. If you choose to disable a detector temporarily, re-enable it immediately after you have finished and aired the space.
Check local burn regulations. In Southern California, British Columbia, and other wildfire-prone regions, burn bans are issued frequently during dry periods. Burning anything - including small smudge bundles - may be prohibited under these conditions. Check with your local fire authority before burning if you are in a fire-risk region.
Store herbs safely. Dried plant material is flammable. Store bundles away from heat sources, in a cool and dry location. Keep them out of reach of children.
Setting Intention and Creating Ritual
The most consistent finding from psychological research on ritual practice is that subjective meaning - the sense that an action is imbued with personal significance - produces measurable psychological effects. A 2018 peer-reviewed study in Personality and Social Psychology Review by Hobson, Schroeder, Risen, Xygalatas, and Inzlicht established that rituals reduce anxiety, improve performance on valued tasks, and enhance self-efficacy. These effects appear regardless of whether the practitioner believes in supernatural mechanisms.
This does not explain away the spiritual dimension of smoke cleansing - it simply confirms that doing something meaningful with full attention has real effects on psychological state. The ritual structure of smoke cleansing - the preparation, the deliberate movement through space, the clear intention - creates a contained and purposeful experience that the mind treats as significant.
Setting a clear intention before cleansing is the most important step in making the practice personally meaningful. Some people write their intention down before beginning. Some speak it aloud as they light the herbs. Some hold it silently and return to it throughout the process. The specific form matters less than the clarity of the intention itself.
Many practitioners find that following a home cleansing with positive action in the same space deepens the sense of renewal: rearranging furniture, bringing in fresh flowers, placing meaningful objects, playing music that lifts the atmosphere. The smoke cleansing becomes the opening act of a more comprehensive renewal rather than a standalone act.
Ethical Sourcing and Sustainable Alternatives
If you want to support ethical practice around smoke cleansing, the sourcing decisions you make when purchasing herbs matter considerably.
For white sage specifically: the safest ethical option is to grow your own from seed (Salvia apiana seed is commercially available, though germination is slow and the plant needs warm, dry conditions). The second option is to source from Indigenous-owned businesses that explicitly state their plants are sustainably grown or harvested according to traditional protocols. If you cannot verify the source, use an alternative.
Common culinary sage (Salvia officinalis) is widely cultivated, not ecologically at risk, and contains many of the same aromatic compounds as white sage. It burns similarly and serves the same practical purpose for smoke cleansing. Rosemary (Salvia rosmarinus, recently reclassified from Rosmarinus officinalis) is another Mediterranean alternative with a long history of use for purification.
For practitioners who want to work with their own ancestral traditions, consider what aromatic plants were used in your heritage. If your ancestry is from northern Europe, juniper has a documented place in Celtic and Scottish saining practice. If Mediterranean, rosemary, thyme, and lavender all have histories of use. If Middle Eastern or South Asian, frankincense and copal are well-documented, extensively traded aromatics with no current conservation concerns when purchased from reputable sources.
Thalira's ritual tools collection includes ethically sourced materials for energy clearing work. When selecting any smoke cleansing materials, look for explicit sourcing information from the vendor - where the plant was grown or harvested, by whom, and under what conditions.
Working With Other Energy Clearing Tools
Smoke cleansing is one of several approaches to shifting the energetic atmosphere of a space. Many practitioners use it in combination with other tools depending on intention and context.
Sound: Singing bowls, bells, and clapping have long traditions of use for energy clearing. Sound travels through a space differently from smoke, reaching areas where smoke might not penetrate and producing vibrations that many practitioners report as palpable. Thalira's sound healing tools include options suited to space clearing work.
Crystals: Placing protective crystals such as black tourmaline or obsidian at entry points, or selenite throughout a space, is a common complement to smoke cleansing in contemporary energy work practice. The smoke cleansing is sometimes understood as clearing accumulated stagnation while the crystals maintain ongoing protection or a particular quality of energy.
Salt: Placing bowls of salt in corners of a room is a widely practiced folk protective tradition across European and some Asian cultures. Salt has been associated with purification and protection in many traditions, and some practitioners use it before or after smoke cleansing as an additional clearing measure.
Fresh air and light: Opening windows to allow sunlight and outdoor air to move through a space is the most elemental form of atmospheric renewal. Many practitioners find that smoke cleansing works best when followed by thorough airing of the space - letting whatever has been stirred up or released fully exit before the windows are closed again.
The frequency of home cleansing is entirely a matter of personal practice and intuition. Some people cleanse seasonally, particularly around the solstices and equinoxes or at the change of seasons. Others do it when moving into a new home, after a difficult period, before hosting an event, or whenever a space feels stagnant. There is no single correct frequency - the practice should serve your actual needs rather than a calendar obligation.
The Smudging and Blessings Book: Inspirational Rituals to Cleanse and Heal by Alexander, Jane
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Frequently Asked Questions
What is smudging and where does it come from?
Smudging is a specific Indigenous North American ceremonial practice involving the burning of sacred plants - most commonly white sage, sweetgrass, cedar, and tobacco - for spiritual purification and healing. It is embedded in specific cultural protocols that vary by nation. The broader practice of burning aromatic plants for cleansing is cross-cultural and ancient, appearing in Vedic havan ceremonies, Japanese kodo, Catholic incense rituals, and Celtic saining traditions.
Does burning sage actually kill bacteria?
A commonly cited 2007 study (Nautiyal, Chauhan and Nene, Journal of Ethnopharmacology) found burning a Vedic herbal mixture called havan samagri in a closed room reduced airborne bacteria by over 94%. However, this study did not test white sage (Salvia apiana). Science Feedback and Snopes have both identified widespread misrepresentation of this research online. Salvia officinalis contains antimicrobial compounds including 1,8-cineole and camphor, but burning white sage specifically has not been proven to reduce airborne pathogens.
Is burning sage cultural appropriation?
The term smudging and its specific ceremonies belong to Indigenous North American traditions and carry significant cultural and spiritual weight. Many Indigenous people consider the commercialization and casual use of their sacred practices harmful, particularly given centuries of cultural suppression. Non-Indigenous practitioners who want to burn herbs for cleansing can use the term smoke cleansing and draw on their own ancestral traditions (rosemary in Mediterranean tradition, juniper in Northern European tradition, frankincense in Middle Eastern traditions).
How do you properly smudge a house?
Open windows and doors for ventilation. Light the tip of a dried herb bundle and let it smolder. Starting at the front door, move clockwise through the space, directing smoke into corners and along walls using a feather or your hand. Pay attention to spaces that feel stagnant. Work with clear intention throughout. Extinguish the bundle completely in sand or soil when finished. Allow ash to cool before disposal.
Is white sage endangered and should I stop buying it?
White sage (Salvia apiana) is not federally endangered but faces serious conservation pressure. The California Native Plant Society reports that 50% of wild white sage populations have been lost to urbanization. Metric tons are poached annually to supply commercial demand. Because few large-scale commercial farms exist, most white sage on the market was wild-harvested, often illegally. Ethical alternatives include growing your own, using common culinary sage (Salvia officinalis), or sourcing from Indigenous-owned businesses that harvest sustainably.
What is the difference between smudging and smoke cleansing?
Smudging refers specifically to Indigenous North American ceremonial practices with specific cultural protocols. Smoke cleansing is the broader term for burning aromatic plants for purification or fragrance, practiced across many unrelated cultures worldwide. Using the term smoke cleansing acknowledges the global nature of the practice without appropriating the specific term and ceremony of smudging.
What plants can be used for smoke cleansing besides white sage?
Many plants have traditions of use in smoke cleansing across cultures: palo santo (Bursera graveolens) from South American traditions, frankincense (Boswellia species) from Middle Eastern and Christian traditions, copal resin from Mesoamerican traditions, cedar and sweetgrass from various North American traditions, rosemary and lavender from Mediterranean traditions, and juniper from Northern European and Scottish saining traditions.
Is palo santo endangered?
Bursera graveolens, the species sold as palo santo for incense, was classified by the IUCN in 2019 as "Least Concern" - not endangered. A different tree sometimes called palo santo, Bulnesia sarmientoi, is threatened with over-exploitation. Sustainable palo santo comes from fallen branches rather than cut trees; Ecuador has active reforestation programs. The greater ecological threat is cattle ranching destroying tropical dry forest habitat.
What did ancient cultures use for smoke cleansing?
Smoke cleansing appears across the ancient world: Vedic havan ceremonies in India date to approximately 3000 BCE; Egyptian and Mesopotamian civilizations used frankincense and myrrh in temple and funerary practice; Greek and Roman temples used censers; the Christian thurible tradition dates to the 4th century; Japanese kodo (the Way of Incense) developed as a formal art during the Muromachi period (1338-1573); and Celtic saining used local aromatic plants for purification.
What should I use to catch ash when smudging?
An abalone shell is traditional in some Indigenous practices. For general smoke cleansing, any non-flammable vessel works: a ceramic dish, cast iron bowl, clay pot, or a stone mortar. Sand placed in the bottom of the vessel helps extinguish embers safely. Avoid using flammable materials or plastic containers near burning herbs. Always have water nearby as a precaution.
Sources
- Mohagheghzadeh, A., Faridi, P., Shams-Ardakani, M., and Ghasemi, Y. "Medicinal smokes." Journal of Ethnopharmacology 108, no. 2 (2006): 161-184. https://doi.org/10.1016/j.jep.2006.09.005
- Nautiyal, C.S., Chauhan, P.S., and Nene, Y.L. "Medicinal smoke reduces airborne bacteria." Journal of Ethnopharmacology 114, no. 1 (2007): 129-131. https://pubmed.ncbi.nlm.nih.gov/17913417/
- Ghorbani, A., and Esmaeilizadeh, M. "Pharmacological properties of Salvia officinalis and its components." Journal of Traditional and Complementary Medicine 7, no. 4 (2017): 433-440. https://pmc.ncbi.nlm.nih.gov/articles/PMC5634728/
- Hobson, Nicholas M., Juliana Schroeder, Jane L. Risen, Dimitris Xygalatas, and Michael Inzlicht. "The Psychology of Rituals: An Integrative Review and Process-Based Framework." Personality and Social Psychology Review 22, no. 3 (2018). DOI: 10.1177/1088868317734944.
- California Native Plant Society. "White Sage Protection." https://www.cnps.org/conservation/white-sage
- Science Feedback. "Claim that burning sage purifies the air based on study that burned entirely different plants." https://science.feedback.org/review/claim-that-burning-sage-purifies-the-air-based-on-study-that-burned-entirely-different-plants/