LAISHA · DRAVYAGUNA

Lashuna

लशुन

Allium sativum L.

Amaryllidaceae · Allium

Benefits & side effects

TRADITIONAL VIEW, WITH SAFETY LIMITS

Hindi name: Lehsun

What the texts say Lashuna does

What the evidence says. Small effects where anything is shown at all, and one clear negative.

Side effects and limits

Avoid or ask first: Upcoming surgery — tell the surgical team, because of the bleeding risk.; Do not apply raw garlic to the skin.

A traditional classification, not a recommendation. The full safety record is below.

Photographs

Matra and anupana

AS THE CLASSICAL TEXTS AND THE API PRESCRIBE

Swarasa5–10 ml
Kalka1–3 g
AnupanaDugdha · Ushnodaka
KalaPragbhakta

Classically given in dugdha (Lashunadi ksheerapaka) to soften its ushna tikshna guna.

Reported from Sharangadhara Samhita and the Ayurvedic Pharmacopoeia of India. Laisha states what the texts prescribe; it does not recommend. No quantity here is adjusted for a particular person — not for agni, koshtha, bala, age, pregnancy, kidney or liver function, or anything already being taken.

Rasapanchaka

Rasa
KatuMadhuraTiktaKashayaLavana
Guna
SnigdhaGuruTikshnaPicchila
ViryaUshna
VipakaKatu
PrabhavaThe texts place lashuna among the rasayana and describe a vatahara action they treat as characteristic.
DoshakarmaVatakaphahara. Being tikshna and ushna it increases pitta, which the texts state plainly.

Five rasa, and the one it lacks is amla — which is the opposite omission from amalaki and haritaki, and the reason the name Rasona exists. Katu predominates, and the texts place the katu in the mula (root), tikta in the leaf, kashaya in the stalk, lavana in the tip and madhura in the seed.

Karma and part used

RasayanaVataharaDeepanaKrimighnaVrishyaMedhya

These are the actions the classical texts record. They are statements about what the tradition holds, and this library does not restate them as findings about a human body.

Upayukta angaKanda (the bulb)
Why it mattersThe bulb, divided into cloves. Raw, cooked and aged preparations behave differently, and most supplement research is on a standardised extract rather than on the clove in a kitchen.

Paryaya

RasonaUgragandhaMahaushadhaArishtaYavaneshta

Rasona means wanting one rasa: the texts say lashuna carries five of the six and lacks only amla. That etymology is the single most quoted fact about this dravya and is asked in almost every viva.

Names, by language

EnglishGarlic
SinhalaSudu lunu
NepaliLasun
ArabicThum
ChineseDa suan
HindiLehsun
KannadaBellulli
TamilVellaipoondu
TeluguVellulli
MalayalamVeluthulli
MarathiLasun
GujaratiLasan
BengaliRasun
PunjabiThom
OdiaRasuna
UrduLehsun

Classical references

Bhavaprakasha Nighantu
Haritakyadi Varga
Gives the rasa, guna, virya and vipaka of lashuna and sets out the Rasona etymology.
Charaka Samhita
Sutrasthana, chapter 27 (Annapanavidhi)
Lashuna is described among the articles of diet.
Sushruta Samhita
Sutrasthana, chapter 38 (Dravyasangrahaniya)
Included among the dravya grouped by action.

Rasa, guna, virya, vipaka and karma are recorded as the classical texts give them, with the text and section named so a student can open the book and check. Where an exact chapter and verse could not be confirmed, this library names the section rather than inventing a number.

Formulations it appears in

Lashunadi VatiNamed for the dravya.
Rasona KsheerapakaA milk preparation named for its synonym.

Adulterants and substitutes

Little substituted as a whole bulb, since it is a common food and easily recognised. The problems are in processed forms: garlic powders and oils vary enormously in how much of the original chemistry survives, and a preparation made from cooked or long-stored bulbs is not the same article as one made from fresh. This is a case where the dravya is easy to identify and the preparation is not.

Identity

Matched to the accepted name in the GBIF backbone at 99% confidence. Amaryllidaceae, not Liliaceae — the family was reassigned, and older books still place Allium in the lily family.

A WAY TO REMEMBER IT

Allium is the Latin for garlic. Sativum means sown or cultivated — the same epithet as coriander, and it always marks a plant known only in cultivation.

What the tradition holds

Garlic appears in Ayurveda as rasona and is a daily cooking ingredient across most of the world's cuisines. That is what the tradition holds and what the kitchen does; neither is a finding about what the plant does in a body.

What the evidence says

StatusSmall effects where anything is shown at all, and one clear negative.
SuggestedGarlic supplements may reduce total cholesterol and LDL cholesterol to a small extent in people who have high cholesterol. Limited data suggests modest reductions in blood pressure in people with hypertension.
Not establishedGarlic consumption does not appear to lower the risk of stomach cancer. Its effect on colorectal cancer remains uncertain. Research on colds and immune function is sparse: a 2022 review found only two small studies suggesting possible benefit, both with methodological limitations.
The honest gap'Small extent' and 'modest' are the words the evidence supports, and they are kept here rather than rounded up. A small reduction in a blood test is not the same as a change in whether somebody has a heart attack, and no study cited here measured that.

Safety

Mostly mild and familiar — odour, wind, stomach upset. The two that matter: garlic supplements may increase bleeding risk, which is relevant alongside anticoagulants or aspirin and before surgery; and raw garlic applied to the skin can cause severe burns.

Side effectsBreath and body odour
Abdominal pain
Flatulence
Nausea
Allergic reactions
ContraindicationsUpcoming surgery — tell the surgical team, because of the bleeding risk.
Do not apply raw garlic to the skin.
InteractionsWarfarin, clopidogrel, aspirin — garlic inhibits platelet aggregation, and case reports of bleeding exist. The effect is additive, not theoretical.
Saquinavir and other protease inhibitors — garlic significantly LOWERS saquinavir levels, which is a treatment-failure risk, not a toxicity one.
Antidiabetic medicines — modest additive lowering of blood glucose.
Stop roughly 7–10 days before surgery.
Pregnancy and breastfeedingConsidered unsafe during pregnancy or breastfeeding in amounts exceeding what is normally eaten as food. Garlic used in cooking is a separate question from a concentrated supplement.
Increased bleeding riskGarlic supplements may increase the danger of bleeding. This is particularly relevant for anyone taking anticoagulants or aspirin, and healthcare providers should be told before surgery.
Severe skin burns from raw garlic applied topicallyRaw garlic held against the skin — a common home practice for warts, acne and fungal problems — is documented to cause severe burns. Because it is food, it is assumed to be harmless on skin, and it is not.

Growing it

ClimateA cool-season bulb crop. Most types need a cold period to form proper bulbs, which is why garlic is usually planted in autumn and lifted the following summer.
SoilLoose, free-draining, fertile soil. Wet ground rots the bulb.
PlantingGrown from individual cloves rather than from seed, each clove becoming a bulb. Because the planting material is part of the crop, disease travels from one season to the next in it — the same problem ginger and turmeric have, and the reason clean planting stock matters more in these crops than in seeded ones.
HarvestLifted when the lower leaves have yellowed and dried, while several green leaves remain — those leaves become the wrapper layers that protect the bulb in store.
What is not statedLaisha holds no sourced per-hectare yield or cost-of-production figure for garlic, and no cited cultivar trial. The cultivation notes above are general and are not drawn from a single named source; they are not a substitute for local extension advice.

Grown as a crop: how to grow garlic, from sowing to harvest, in Laisha's grow guides.

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What this is not

Sources

Garlic
National Center for Complementary and Integrative Health (NCCIH), National Institutes of Health · read 2026-09-20
The botanical name, the small effects on total and LDL cholesterol, the modest blood-pressure finding, the negative stomach-cancer finding and uncertain colorectal one, the sparse cold and immune research including the 2022 review, the side-effect list, the bleeding risk and its relevance to anticoagulants, aspirin and surgery, the severe skin burns from topical raw garlic, and the pregnancy and breastfeeding position.
https://www.nccih.nih.gov/health/garlic
Allium sativum L. — GBIF Backbone Taxonomy
Global Biodiversity Information Facility (GBIF), Copenhagen · read 2026-09-20
The accepted botanical name with author, and placement in Amaryllidaceae, matched at 99% confidence.
https://api.gbif.org/v1/species/match?name=Allium%20sativum
European Union herbal monograph on Allium sativum L., bulbus
European Medicines Agency (EMA), Committee on Herbal Medicinal Products · read 2026-09-20
The European regulatory position on garlic bulb as a herbal medicinal product, recorded here so this entry does not rest on a single country. Preparations covered include the powdered herbal substance, a liquid extract from the fresh bulb and a dry extract, in solid oral dosage forms.
https://www.ema.europa.eu/en/medicines/herbal/allii-sativi-bulbus
The Ayurvedic Pharmacopoeia of India — Lashuna (Allium sativum L.)
Pharmacopoeia Commission for Indian Medicine and Homoeopathy, Ministry of Ayush, Government of India · read 2026-09-28
The official Indian pharmacopoeial standing of the dravya and the identity of the part used as the pharmacopoeial article.
https://pcimh.gov.in/
Classical matra by dose form
Sharangadhara Samhita, Madhyama Khanda
The classical quantity for each dose form, as the standard reference gives it. Sharangadhara is where Ayurveda's dose forms and their measures are set out, and it is what every Dravyaguna textbook reproduces.
https://niimh.nic.in/ebooks/esharangadhara/
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