What is Adas?

Adas is the Persian and Unani name for the lentil, Lens culinaris. It is a small dried seed eaten as a food and used in traditional practice as a nourishing, mildly drying dish for the stomach and bowels.

It is used mainly as a staple food with a medicinal reputation. Persian and Unani texts recommend cooked lentil soups and porridges for people who are weak, recovering from illness, or troubled by loose stools.

Modern evidence for lentils is reasonable, but most of it studies pulses as a food group rather than lentils alone. Trials of pulses show small drops in blood sugar after meals and small drops in LDL cholesterol (the "bad" cholesterol).

Traditional standing and proof of effect are two different things. Adas has a long and wide traditional record, but long use on its own is not evidence that something works, and that applies to every claim on this page.

This document covers adas as a single herb-food from the Persian and Unani tradition. It is not a treatment for any disease, and nothing here is a substitute for care from your own doctor.

How does Adas work?

The most likely explanation is simple food chemistry, not a drug effect. Lentils are high in fibre and resistant starch, which slow how fast sugar from a meal enters your blood.

That same fibre binds some bile acids in the gut. Your body then uses cholesterol to make more bile acids, which may be part of why pulses nudge LDL cholesterol down a little.

Protein and slow-digesting carbohydrate together keep you full for longer, which may explain the traditional use for weakness and recovery.

The Unani reading is different. There, adas is classed as cold and dry, and is given to "dry" watery stools and calm heat. That is a traditional framework for describing effects, not a tested biological mechanism.

What forms does Adas come in?

You will meet adas in the kitchen more than the pharmacy.

Common forms:

Whole brown or green lentils, cooked until soft.

Split red lentils (masoor), which cook down into a thick soup or porridge.

Lentil flour, used in breads, batters and traditional poultices.

Sprouted lentils, eaten cooked rather than raw.

There is no standard lentil extract, tincture or capsule with reliable dosing behind it. If you see a lentil supplement, treat the dose on the label as a guess, not a tested amount.

Where it comes from:

Lentils are one of the oldest farmed foods, grown in the Near East for thousands of years. They appear in Persian, Arab, Greek and Indian cooking and medicine alike.

Unani physicians, working from the Greek humoral system, classed adas as cold and dry and used it for loose bowels, for heat, and as a poultice for skin complaints. Ayurveda uses the same seed as masoor dal in similar ways.

This broad, cross-tradition record is why the traditional standing is high even where trial evidence is thin.

What does Adas help with?

• Blood sugar control after meals: This is the best-supported use. Swapping refined starch for lentils lowers the blood sugar rise after a meal in controlled feeding studies, and pooled trials of pulses show small improvements in longer-term glucose markers in people with diabetes. The effect is modest and depends on eating them regularly.
• High LDL cholesterol: Pooled randomised trials of pulses, including lentils, show a small fall in LDL cholesterol (the "bad" cholesterol) of a few percent. That is a useful dietary nudge, not a replacement for cholesterol medicine your doctor has prescribed.
• General weakness and recovery from illness: Traditional Persian and Unani use only. Lentil soup is cheap, soft and rich in protein and folate, which makes sense for someone eating poorly, but no trial has tested lentils for recovery from illness.
• Mild constipation: Reasonable on general nutrition grounds. A cup of cooked lentils carries a lot of fibre, and fibre bulks and softens stool. No trial has tested lentils on their own for constipation.
• Loose stools (traditional use): Unani texts class adas as drying and give it for watery stools, usually well cooked and without the skins. There is no human trial support for this, and the fibre content means it can just as easily loosen the bowels in some people.
• Low iron or folate intake in the diet: Lentils are a good plant source of iron and folate, which matters most for vegetarians and vegans. Plant iron is absorbed poorly, so pairing lentils with vitamin C foods helps. Lentils do not treat diagnosed iron-deficiency anaemia (low blood iron) on their own.

Which foods are rich in Adas?

1. Red lentil soup (adasi): the classic Persian preparation, soft and easy to digest
2. Brown and green lentil stews: hold their shape and carry the most fibre and polyphenols
3. Dal made from masoor lentils: the same seed in South Asian cooking
4. Lentil salads with lemon: the vitamin C helps your body absorb the plant iron
5. Lentil flour flatbreads: a gluten-free way to use the seed

Practical Tips:

Adas is itself a food, so eating it is the traditional and the practical dose.

What are the side effects of Adas?

• Gas and bloating, especially when you first add lentils to your diet
• Stomach cramps
• Loose stools, or harder stools if you do not drink enough water
• Nausea, vomiting and diarrhoea from undercooked lentils, caused by lectins (natural plant proteins that irritate the gut)
• Reduced absorption of iron and zinc from the same meal, due to phytates
• Allergic reaction, which is uncommon but can be severe
• Higher uric acid load, which may matter if you get gout (a painful joint condition caused by uric acid crystals)

Good to know:

For most people lentils cause nothing worse than wind for the first week or two. Cooking them thoroughly, rinsing well and increasing the amount slowly makes a real difference.

Serious problems are rare and mostly involve allergy or eating lentils raw or barely cooked. Never eat lentils raw or lightly sprouted without cooking them.

How much Adas should you take?

• Recommended daily: There is no medicinal dose for adas, because it is a food. Trials of pulses that showed benefit generally used about one cup of cooked pulses a day, which is roughly 130 grams cooked or 50 to 60 grams dry. A traditional Persian serving is a bowl of well-cooked lentil soup. Build up slowly if you rarely eat beans, or the gas and bloating will put you off.
• Best time of day: Any time. Eating lentils with your largest starchy meal makes most sense if your aim is a gentler blood sugar rise after eating.
• With or without food: Adas is food, so this does not apply. One thing does: keep lentil-heavy meals a few hours away from iron or zinc supplements and from thyroid tablets, because the fibre and phytates can block absorption.
• Time to effect: The effect on blood sugar after a meal happens at that meal. Changes in cholesterol take weeks to months of regular eating. Fullness and easier bowels are usually noticed within a week or two.
• How long to take it: Adas is a food and can be eaten indefinitely as part of a normal diet. If you are eating lentils daily to help blood sugar or cholesterol, give it about three months and then have those numbers checked. If your numbers have not moved, food alone is not enough for you. Talk to your doctor rather than simply eating more.