Digestion · Rest · Relaxing aroma
Bay leaf: the quiet leaf in grandma's beans, stews and evening tea
What the research says about Laurus nobilis for gas and heavy digestion, the truth about "relaxing" bay leaf vapors, and three safety rules most people don't know.
By Mariana Farias, Founder & Editor of Las Recetas de mi Abuela · Updated November 4, 2026
Fact-checked against USDA FoodData Central, MedlinePlus (NIH), the U.S. Environmental Protection Agency (EPA) and peer-reviewed studies in PubMed. Educational content — not medical advice.
Key takeaways
- Bay leaf's aroma comes mainly from 1,8-cineole and linalool, compounds studied for digestive and calming effects.
- Its use for gas and heavy digestion is traditional; human studies are very limited.
- For a relaxing aroma, simmer the leaves — don't burn them. Indoor smoke irritates the lungs.
- Never swallow a whole leaf (it can lodge in the throat), and only use true bay laurel: some ornamental "laurels" are poisonous.
Every pot of frijoles de la olla that grandma made had two bay leaves floating on top. They went into stews, caldos, pickled jalapeños and tinga, and on cold nights she brewed a cup of té de laurel con canela "to settle the stomach and sleep well". Lately, social media has added a new ritual: burning bay leaves to "release anxiety". Let's separate tradition, science and smoke.
What is bay leaf?
True bay leaf comes from Laurus nobilis, the bay laurel, an evergreen tree of the laurel family (Lauraceae) — the same family as cinnamon and avocado. It is native to the Mediterranean, where its branches crowned victors in ancient Greece and Rome; that is why we still speak of "laureates". The leaves are dried for cooking.
In Mexico, the "laurel" sold in markets is often Mexican bay, Litsea glaucescens, a native relative with a similar but softer aroma, used the same way in the kitchen. Both are safe culinary herbs. What is not safe are ornamental plants also called "laurel", such as cherry laurel (Prunus laurocerasus) or mountain laurel (Kalmia latifolia), which are toxic. Only cook with leaves sold as a culinary spice.
Active compounds
- 1,8-Cineole (eucalyptol)The main compound of bay leaf oil, often 30–50% of it. Gives the fresh, slightly medicinal aroma, shared with rosemary and eucalyptus.
- LinaloolA floral-scented terpene also found in lavender. Inhaled linalool has calming effects in animal studies.
- Eugenol and methyleugenolWarm, clove-like compounds present in smaller amounts.
- Sesquiterpene lactonesBitter compounds such as costunolide, studied for stomach-protecting effects in the lab — and responsible for skin allergies in sensitive people.
What science says about bay leaf
1. Gas and heavy digestion Traditional use
Bay leaf has been used as a carminative — a remedy for gas and bloating — around the Mediterranean and in Latin America for centuries. Its bitter compounds stimulate digestive secretions, and in animal studies bay leaf extracts protected the stomach lining against irritation. There are no good clinical trials in people with indigestion yet. The popular belief that bay leaves make beans less gassy has never been tested either; soaking beans and discarding the water is what reduces their gas-causing sugars.
2. Relaxing aroma and rest Animal studies only
Linalool and 1,8-cineole have calming effects when inhaled by laboratory animals, and linalool-rich scents like lavender have shown modest relaxation effects in some human studies. No study has tested bay leaf aroma for anxiety or sleep in people. A warm, fragrant cup of bay leaf tea can be part of a calming bedtime routine — just don't expect a sedative.
3. Why you should not burn bay leaves indoors Well established
The "burn a bay leaf for anxiety" trend releases smoke, and any indoor smoke contains fine particles that irritate the airways. The U.S. Environmental Protection Agency warns that fine particles from burning are harmful to breathe, especially for people with asthma, children and older adults. There is also a fire risk. If you want the aroma, simmer a few leaves in water on the stove: you get the scent without the smoke.
4. Blood sugar and cholesterol One small study
In a small 30-day study of 40 people with type 2 diabetes, 1 to 3 grams of ground bay leaves a day lowered blood sugar and improved cholesterol. It has not been confirmed by larger trials. If you have diabetes, a bay leaf in your stew is fine; ground bay leaf as a supplement should be discussed with your doctor.
5. Antimicrobial and antioxidant activity Lab evidence
Bay leaf oil and extracts inhibit several bacteria and fungi and show antioxidant activity in lab tests, which helps explain why bay leaves were traditionally added to pickles and preserves. These effects have not been tested as treatments in people.
Botanical and nutrition facts
| Scientific name | Laurus nobilis L. (Mexican bay: Litsea glaucescens Kunth) |
|---|---|
| Family | Lauraceae (laurel family) |
| Part used | Dried leaves; essential oil |
| Origin | Mediterranean region; Mexican bay: Mexico and Central America |
| Main compounds | 1,8-Cineole, linalool, α-terpinyl acetate, eugenol, sesquiterpene lactones |
| Flavor | Herbal, slightly floral and bitter, resinous |
| Nutrient | Per 100 g | Per 1 tsp crumbled (0.6 g) |
|---|---|---|
| Energy | 313 kcal | 2 kcal |
| Carbohydrates | 75.0 g | 0.5 g |
| Dietary fiber | 26.3 g | 0.2 g |
| Protein | 7.6 g | 0.05 g |
| Fat | 8.4 g | 0.05 g |
| Iron | 43 mg | 0.26 mg |
| Manganese | 8.2 mg | 0.05 mg |
| Calcium | 834 mg | 5 mg |
| Vitamin C | 46.5 mg | 0.3 mg |
Source: USDA FoodData Central (SR Legacy, "Spices, bay leaf"). One dried leaf weighs only about 0.1–0.2 g, so its nutritional contribution is tiny. Values are rounded.
Dosage calculator
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👵 Grandma's bay leaf and cinnamon tea for a heavy stomach
- Put 2 dried bay leaves and a small piece of Ceylon cinnamon (3 cm) in a small pot with 300 ml of water.
- Bring to a boil, lower the heat, cover and simmer for 5 minutes.
- Turn off the heat and let it rest 5 minutes more. The tea turns light amber.
- Strain carefully — remove the leaves — and drink it warm after dinner or before bed.
Precautions and contraindications
🟢 Generally safe
- Bay leaves as a seasoning in food for almost everyone, including children and pregnant women (remove the leaves before serving).
- 1–2 cups of bay leaf tea a day for healthy adults.
- Simmering leaves in water to scent the house, if someone watches the pot.
🟡 Ask your doctor first
- Diabetes medication: ground bay leaf may lower blood sugar.
- Sedatives or sleeping pills: bay leaf may add to drowsiness in large amounts.
- Planned surgery: stop medicinal bay leaf about 2 weeks before.
- Pregnancy and breastfeeding: avoid medicinal amounts and the essential oil.
- Sensitive skin: bay laurel is a known cause of allergic contact dermatitis.
🔴 Avoid
- Swallowing whole or large pieces of leaf: they stay stiff after cooking and have caused throat and intestinal injuries.
- Burning bay leaves indoors, especially around children or people with asthma or COPD.
- Leaves from ornamental "laurels" (cherry laurel, mountain laurel, oleander or the laurel trees in public squares): some are poisonous.
- Bay leaf essential oil by mouth.
Frequently asked questions
Does bay leaf tea help with gas and bloating?
Bay leaf is a traditional remedy for gas and heavy digestion, and its bitter compounds stimulate digestive secretions. There are no good human studies yet, but a warm cup after a heavy meal is a low-risk habit for most healthy adults.
Is it safe to burn bay leaves for anxiety?
It is not recommended indoors. Burning leaves releases smoke with fine particles that irritate the lungs, especially in children and people with asthma, and there is a fire risk. Simmering a few leaves in water gives you the aroma without the smoke.
Can you eat bay leaves?
Bay leaves are not toxic, but whole or large pieces stay stiff and sharp after cooking and have caused injuries in the throat and intestines. Always remove them before serving. Finely ground bay leaf is safe in cooking.
Is Mexican laurel the same as bay leaf?
Not always. In Mexico, culinary laurel is often Litsea glaucescens, a native plant with a similar aroma, while Mediterranean bay leaf is Laurus nobilis. Both are safe as spices. Never use leaves from ornamental plants called laurel, because some are poisonous.
Does bay leaf help you sleep?
Bay leaf contains linalool, a calming aroma compound in animal studies, but there are no human studies on bay leaf and sleep. A warm, caffeine-free cup can be part of a relaxing bedtime routine.
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Perfect pairing
Bay leaf + valerian
When bay leaf's relaxing aroma isn't enough, grandma reached for valerian root. Learn what the sleep studies really show — and the medications it must never be mixed with.
Read the valerian guide →Keep reading
More ingredients from grandma's kitchen
CloveSyzygium aromaticum
LemonCitrus limon
Ceylon cinnamonCinnamomum verum
ChamomileMatricaria chamomilla
GingerZingiber officinale
TurmericCurcuma longa
GarlicAllium sativum
OreganoOriganum vulgare
RosemarySalvia rosmarinus
PeppermintMentha × piperita
HibiscusHibiscus sabdariffa
Aloe veraAloe barbadensis
Chia seedsSalvia hispanica
Star aniseIllicium verum
ValerianValeriana officinalis
Apple cider vinegarMalus domestica
FlaxseedLinum usitatissimum
EucalyptusEucalyptus globulus
Raw honeyApis mellifera
Sources
- U.S. Department of Agriculture. FoodData Central — Spices, bay leaf. fdc.nal.usda.gov
- MedlinePlus (U.S. National Library of Medicine). Herbs and Supplements. medlineplus.gov
- U.S. Environmental Protection Agency. Particulate Matter (PM) Basics. epa.gov
- PubMed — bay leaves and glucose and lipids in type 2 diabetes. pubmed.ncbi.nlm.nih.gov
- PubMed — chemical composition of Laurus nobilis essential oil. pubmed.ncbi.nlm.nih.gov
- PubMed — bay leaf as an ingested foreign body. pubmed.ncbi.nlm.nih.gov
⚕️ This guide is for educational purposes and does not replace the advice of a doctor or pharmacist. Read our full medical disclaimer.