Ayurvedic treatment for diabetes works by restoring tissue-level metabolism (dhatvagni) and clearing accumulated metabolic residue (kleda), not by chasing blood sugar alone. Used alongside modern care, the best-studied Ayurvedic herbs and yoga lower HbA1c by roughly 0.3% to 1.6% in clinical trials.

India now has an estimated 101 million people with diabetes and 136 million with prediabetes, according to the ICMR-INDIAB study published in The Lancet Diabetes & Endocrinology in 2023 (NMJI summary). Most of them have Type 2 diabetes, the form Ayurveda describes in greatest detail.

This guide explains the Ayurvedic model of diabetes (prameha and madhumeha) from first principles, drawing on the classical understanding of prameha as a disorder of the fat-carrying channels (medovaha srotas). It maps that model onto modern insulin physiology, sets out the classical treatment principles stage by stage, and weighs each herb and practice against the published clinical evidence.

What you will learn

• Why Ayurveda sees Type 2 diabetes as a disease of fat-tissue metabolism, long before blood sugar rises
• How the “uptake end” and “utilization end” of dhatvagni explain insulin resistance and beta-cell strain
• Why kapha-type diabetes is considered curable, pitta-type controllable, and vata-type incurable
• Which treatment principle fits which stage: langhana, lekhana, pachana-deepana or santarpana
• Which herbs and formulations have trial evidence, and how to use Ayurveda safely with your medication

Medical note: This article is educational. Do not stop or reduce diabetes medication without your doctor. Several Ayurvedic herbs lower blood sugar, and combining them with insulin or tablets can cause hypoglycaemia if doses are not adjusted under supervision.

How Ayurveda understands diabetes: prameha and madhumeha

Ayurveda classifies diabetes under prameha, a group of 20 urinary disorders marked by excessive and turbid urine. Madhumeha (“honey urine”) is the final, most advanced type, and the name came to stand for all diabetes because sweetness is present in the body or urine in every form.

Prameha is placed among diseases of the medovaha srotas, the channels that form and carry fat tissue. That placement explains much of the Ayurvedic approach: diabetes is treated first as a disorder of fat metabolism, with high blood sugar as its downstream sign.

The four key players

Term	What it means	Modern parallel
Kleda	The watery, unctuous portion of kapha; the chief tissue affected (dooshya) in prameha	Circulating glucose, lipids and body fluids
Madhura-kleda	Free, usable energy in circulation	Blood glucose
Precursor sneha	Tissue-specific nutrients each dhatu draws from blood	Fatty acids, amino acids and other substrates
Aagantu kapha	Kapha vitiated by diet, inactivity and inherited tendency	The metabolic load of overnutrition

Kleda is of two kinds. Drava-kleda (linked to pitta) is the circulating and excretory fluid. Saandra-kleda (linked to kapha) is the denser intracellular fluid and lipid. Glucose and sticky precursor nutrients (sneha-picchila) both count as kapha’s kleda.

The tissues consistently involved are medas (fat), mamsa (muscle), kleda and mootra (urine). The classical diagnostic rule follows: if at least half the premonitory symptoms appear together with excess urine, the condition is prameha.

The root mechanism: dhatvagni at the uptake and utilization ends

Type 2 diabetes begins when tissues stop burning the energy they store, and only later when they stop accepting new energy. This two-step sequence maps closely onto how insulin resistance develops.

Dhatvagni works at two ends

Every tissue (dhatu) has its own metabolic fire, dhatvagni. It operates at two points:

• The uptake end draws nutrients from blood into the tissue. Prana vayu governs this, and insulin is its modern counterpart: it moves glucose and amino acids across cell membranes.
• The utilization end converts stored nutrients into energy and function. Samana vayu governs this, acting on kledaka kapha.

Insulin therefore acts on both prana and samana. Prana handles transport into the cell; samana handles storage, glycogen formation, conversion to triglycerides and protein synthesis.

How the disease unfolds

1. Utilization fails first. Heavy, sweet, oily food and a sedentary life weaken dhatvagni at the utilization end of fat tissue. Energy is stored but not burned.
2. Kleda accumulates. Unused sneha-kleda (kledaka kapha) builds up inside medas throughout the body. Fat tissue enlarges (dhatu-vriddhi).
3. Uptake fails next. The overloaded tissue resists further entry. This is insulin resistance: glucose and fat precursors cannot get in.
4. Blood becomes overloaded. Glucose (madhura-kleda) rises in rakta, along with fat-tissue precursor sneha. High blood sugar and high insulin now coexist.
5. Muscle follows fat. Disturbed fat tissue upsets the balance of fat and muscle (mamsa-samhanana). Muscle precursors join the excess in circulation.
6. The body flushes the excess. Vyana vayu is disturbed and the untransformed kleda is pushed toward the urinary tract. Apana expels it as abundant, turbid urine (prabhoota-aavila mootrata).

Settling of the disease in fat tissue produces the premonitory symptoms; involvement of the urinary channels produces the full disease. Every one of the eight features of obesity (atisthoulya) can appear in prameha, since all trace back to fat-tissue dysfunction.

Why this matters for treatment

Samana and kledaka kapha are the two most important factors to correct. Lowering glucose without restoring the utilization end leaves the root cause in place. That is why exercise, which kindles dhatvagni, is indispensable rather than optional.

Type 1 vs Type 2 diabetes in Ayurveda

Ayurveda separates diabetes into two classes that line up closely with Type 1 and Type 2: sahaja (inborn) and apathyanimittaja (caused by unwholesome diet and lifestyle). The difference lies in which end of dhatvagni fails first.

Feature	Sahaja prameha (≈ Type 1)	Apathyanimittaja prameha (≈ Type 2)
Which end fails	Uptake end from the start; utilization end stays active	Utilization end first, uptake end later
Insulin picture	Production falls (autoimmune loss of over 90% of beta cells)	Insulin resistance, with high insulin alongside high sugar
Body type	Thin and dry (krisha, rooksha), eats little, always thirsty, restless	Obese (sthoola), unctuous, voracious eater, fond of inactivity
Root cause	Genetic predisposition plus an environmental trigger	Inherited tendency (medo-saara, soft kapha constitution) plus heavy, sweet, cold, oily food and lack of exercise
Prognosis	Asaadhya (not curable by Ayurveda alone; insulin is essential)	Saadhya to yaapya, depending on stage

Because both forms carry a genetic component, prameha is called an anushangi roga: a disease that persists for life or becomes manageable rather than curable in many people.

Two routes to beta-cell strain and resistance

• Beta-cell dysfunction comes from chronic excess of sweet, fatty food (atyaahaara). Guru (heavy) quality dulls agni and impairs insulin output.
• Insulin resistance comes from dhatvagni-mandya preceded by enlargement of fat tissue. Sedentary life weakens the energy-using end, disturbing the kledaka kapha–samana axis in muscle and fat.

Both end in prana dushti, which impairs glucose transport across cell membranes. Each calls for a different treatment emphasis, set out below.

Causes of diabetes in Ayurveda (nidana)

Anything that increases fat, urine and kapha can cause prameha, and the clue to treatment lies in these causes themselves. Remove the cause and the disease loses its fuel.

The six classical risk traits

The classics describe the person prone to prameha with six traits. The first two drive the development of the disease; the remaining four drive its severity:

1. Gridhnu abhyavahaaryeshu — craving and overeating food
2. Snaana-cankramana dvit — aversion to bathing and exercise
3. Mandotsaaha — low enthusiasm and drive
4. Atisthoola — excess body weight
5. Atisnigdha — excessively oily, unctuous constitution
6. Mahaashana — gluttony, very large meals

Dietary and lifestyle triggers

• Excess sweet, sour and salty taste (madhura, amla, lavana). Sweet raises kleda by over-nourishment, sour increases fluidity, and salt causes water retention.
• Heavy, cold, oily foods; dishes made from freshly harvested grains; fresh alcohol
• Excess sleep, daytime naps and a sedentary routine
• Lack of physical activity, mental stimulation and sexual activity (avyaayaama, avyavaaya, acintana), combined with constant comfort
• Not regularly eliminating accumulated kapha and pitta

Predisposition

The obese Type 2 pattern carries an inherited tendency called beeja-swabhaava: a medo-saara (fat-dominant) build or a soft kapha constitution. Diet and inactivity act on that soil. This matches modern evidence that family history and central obesity sharply raise Type 2 risk.

The three stages: kapha, pitta and vata prameha

Prameha is tridoshic throughout, but the dominant dosha shifts as tissues deplete: kapha first, then pitta, then vata. Each shift makes the disease harder to treat.

Stage	Dominant dosha	Tissues losing nutrients into urine	Types	Prognosis
Early	Kapha	Medas, mamsa, rasa, shukra	10 kapha pramehas	Saadhya (curable)
Middle	Pitta	Rakta (blood) added	6 pitta pramehas	Yaapya (controllable)
Late	Vata	Vasa, majja, laseeka, ojas	4 vata pramehas, ending in madhumeha	Asaadhya (incurable)

Kapha stage: why it is curable

In kapha prameha the tissues are enlarged and vitiated rather than depleted. Kapha and its affected tissues share the same qualities, so one treatment principle addresses both the dosha and the tissue. The ten kapha types are distinguished by the urine’s appearance, from clear and watery (udaka meha) to sugarcane-juice-like (ikshuvalika) to dense and sticky (saandra meha).

Pitta stage: why it becomes controllable only

After years of chronic disease, the kapha-burdened tissues begin to deplete and pitta becomes prominent. Pitta vitiates rakta, which is identical in nature to pitta, so the disease takes a firmer hold. Treatment must balance the fat-reducing approach the disease needs against the heat of pitta, so the condition can be managed but not cured.

Vata stage and madhumeha: why it is incurable

When rakta also depletes, vata takes over and draws on the deepest reserves: vasa in muscle, majja in bone, laseeka in skin, and finally ojas, the essence of all tissues. Madhumeha is the last vata type, where ojas itself is lost into the urine, giving it the astringent-sweet taste of honey.

Vata needs nourishing (brimhana) therapy, while the lingering fat-muscle disease needs reducing (langhana) therapy. The two cannot be applied together, which is why vata prameha is classed as incurable.

Madhumeha from obstruction (aavaranaja)

Madhumeha can also arise without depletion. Kapha, pitta, fat and muscle can obstruct vata (aavarana), reversing its flow and pushing ojas toward the urine. Sour, salty, hot and oily foods, rather than sweet ones, are the main triggers here. Its symptoms come and go, which separates it from the depletion type. It is difficult but possible to treat (kricchra-saadhya), and becomes incurable after about one year.

Ayurvedic treatment principles for diabetes (chikitsa)

Ayurvedic treatment for diabetes matches the therapy to the defect: reduce and scrape when beta cells are strained, kindle and dry when tissues resist insulin, and nourish carefully only when depletion sets in.

Clinical situation	Ayurvedic defect	Treatment principle	What it aims to do
Reduced insulin output (beta-cell dysfunction)	Agni dulled by guru guna; later samana–kledaka kapha dysfunction	Langhana–lekhana	Lighten the system and scrape away excess fat and kapha
Insulin resistance (obesity, sedentary life)	Utilization-end dhatvagni weak; kledaka kapha–samana dysfunction	Pachana–deepana with rookshana	Digest and burn accumulated kleda, rekindle agni, dry excess unctuousness, normalise samana
Kapha-predominant stage	Fat and kapha excess throughout	Atisthoulya and oorustambha principles, applied judiciously	Reduce obesity and clear heavy, sticky kapha from channels
Pitta or vata stage	Rakta involvement or tissue depletion	Vyadhi vipareeta + hetu vipareeta	Treat the disease and the dominant dosha together
Complications (vascular, nerve, kidney)	Medah-kaphaavrita vata	Medah-kaphaavrita vata chikitsa	Clear fat and kapha obstructing vata in the affected channels
Over-depletion in kapha-pitta types (pain, gulma, scanty urine)	Apatarpana atiyoga (too much reduction)	Santarpana via snehana, not brimhana	Restore with measured oleation, without bulk-building

1. Langhana and lekhana: lightening and scraping

Langhana covers all lightening measures: lighter meals, fasting windows, exercise and dry, light foods. Lekhana goes further, using scraping herbs and practices to reduce fat and kapha deposits. This principle fits where reduced insulin secretion dominates, since heavy (guru) quality is what suppresses agni.

2. Pachana, deepana and rookshana: kindling and drying

For insulin resistance, the target is the utilization end. Pachana digests the accumulated, untransformed kleda; deepana rekindles agni; rookshana counters the oily, sticky quality that blocks uptake. Together they normalise samana, the vayu that lets muscle and fat receive nutrients.

3. Treat by the dominant dosha as the disease progresses

In kapha prameha, treating the dosha and treating the tissue are the same, so results are best. In pitta and vata stages, the physician must combine disease-directed and dosha-directed therapy, and the two can pull in opposite directions. This is why early, aggressive lifestyle treatment matters most.

4. Prevent over-treatment

Reducing therapy taken too far in kapha-pitta types causes its own complications. When that happens, measured snehana (oleation) is used rather than heavy nourishment. Ayurvedic diabetes care is dynamic and must be reviewed as the patient changes.

5. The physician’s two priorities

Apana-vyana disturbance is characteristic of prameha, but samana and kledaka kapha are the most important factors to correct in treatment. Every herb, diet and practice below can be read as serving that goal.

Ayurvedic herbs and formulations for diabetes: what the research shows

The largest review to date pooled 199 randomized trials covering 21,191 people and 98 Ayurvedic medicines, and found that several improve glycemic control in Type 2 diabetes (Chattopadhyay et al., Frontiers in Pharmacology, 2022). The same review cautions that most trials were poorly reported, so these results are promising rather than definitive.

Single herbs with pooled trial evidence

Herb (Sanskrit name)	Ayurvedic action in prameha	HbA1c change vs control
Bael, Aegle marmelos (Bilva)	Kapha-reducing, digestive	−1.6%
Psyllium, Plantago ovata (Isabgol)	Slows absorption, regulates bowel	−0.9%
Fenugreek, Trigonella foenum-graecum (Methika)	Deepana, kapha-vata reducing	−0.6%
Guduchi, Tinospora cordifolia	Rasayana, tridosha-balancing	−0.5%
Shallaki, Boswellia serrata	Lekhana, anti-inflammatory	−0.5%
Kalonji, Nigella sativa (Krishna jiraka)	Deepana, pachana	−0.4%
Bitter gourd, Momordica charantia (Karavellaka)	Tikta rasa, kapha-pitta reducing	−0.3%
Gurmar, Gymnema sylvestre (Meshashringi)	“Sugar destroyer”; reduces madhura craving	Significant falls in fasting and post-meal glucose, HbA1c and lipids across 10 studies (Devangan et al., 2021)

HbA1c figures from Chattopadhyay 2022. Across the medicines reviewed, fasting blood glucose fell by 4 to 56 mg/dL. Reported side effects were mostly none to mild and largely digestive.

Notice how these herbs fit the treatment principles above. Most are bitter (tikta), astringent (kashaya) or pungent: the tastes that reduce kapha and kleda, kindle agni and dry excess unctuousness.

Nisha-amalaki: the classical first-line formula

Nisha-amalaki combines turmeric (Haridra/Nisha) and Indian gooseberry (Amalaki), and the classics recommend it for all types of prameha. Two recent trials stand out:

• Prediabetes: In a randomized, placebo-controlled trial, six months of Nisha-amalaki capsules significantly lowered fasting and post-load glucose, HbA1c and HOMA-IR (insulin resistance), and the authors propose it to delay progression to diabetes (PMC10587713).
• Obese Type 2 diabetes: A randomized trial in Wardha compared Nisha-amalaki churna with metformin. Both lowered fasting glucose equally; Nisha-amalaki did better on post-meal glucose, while metformin did better on BMI (Chhabra & Kuchewar, JCDR, 2024).

These were small trials, so they support Nisha-amalaki as a complement to care, not a proven replacement for metformin.

Government-developed formulations

• AYUSH-82: Developed by the Central Council for Research in Ayurvedic Sciences (CCRAS) as a combination of known glucose-lowering herbs. In clinical studies it significantly reduced fasting and post-meal sugar and eased symptoms such as excessive urination and thirst over 24 weeks (JDRAS; DST).
• BGR-34: Developed by CSIR’s NBRI and CIMAP laboratories from herbs including Daruharidra, Giloy, Vijayasar, Gudmar, Manjistha and Methika. Independent trials at Banaras Hindu University found it effective in newly diagnosed Type 2 diabetes, as reported to Parliament (Medical Dialogues).

CCRAS has also tested classical formulations including Nishamalaki churna, Saptavimshati guggulu, Guduchi churna, Chandraprabha vati, Haridra churna and Gokshuradi guggulu (CSIR/CCRAS summary).

Choose the formulation by stage, not by label

A kapha-stage patient with obesity needs scraping, drying herbs; a vata-stage patient with weight loss may be harmed by them. An Ayurvedic physician selects formulations by stage, dosha, digestive strength and existing medication. Self-prescribing from a product label skips the very diagnosis that makes Ayurveda individualised.

Ayurvedic diet, exercise and lifestyle for diabetes

Diet and exercise are not add-ons in Ayurvedic diabetes care; they are the treatment of the cause. Regular exercise and eating according to one’s metabolic capacity keep tissues working at every age, and proper exercise is indispensable for kindling dhatvagni.

Modern evidence agrees. Announcing the ICMR-INDIAB results, ICMR’s director general said prediabetes is fully reversible and that around 60% of diabetes can be reversed through healthy diet and physical activity (The Tribune).

Foods to favour (kapha- and kleda-reducing)

• Old grains: barley (yava, the classical staple for prameha), millets, and rice or wheat stored for a year rather than freshly harvested
• Pulses: green gram (mudga), horse gram (kulattha), chickpea
• Bitter and astringent vegetables: bitter gourd, fenugreek leaves, drumstick, ivy gourd, bottle gourd
• Spices that kindle agni: turmeric, fenugreek seed, cumin, black pepper, dry ginger
• Fruits in moderation: jamun, amla, guava
• Warm, freshly cooked, light meals at regular times

Foods to limit (kapha- and kleda-increasing)

• Sugar, jaggery, sweets and sugarcane products (excess madhura)
• Freshly harvested grains, refined flour and heavy, fried foods
• Excess curd, new jaggery-based preparations, fresh alcohol
• Very sour and very salty foods, which add to kleda build-up and, in excess, to obstructive madhumeha
• Overeating and frequent snacking

Exercise: rekindling the utilization end

Because Type 2 diabetes starts with energy that tissues fail to burn, movement is the most direct way to treat the utilization end. Brisk walking, strength work that builds muscle (mamsa), and yoga all qualify.

Yoga has the strongest trial base among Ayurveda-allied practices:

• A meta-analysis of 23 studies (2,473 adults) found yoga improved HbA1c, fasting and post-meal glucose, lipids, blood pressure, BMI and waist-hip ratio compared with controls (Thind et al., Preventive Medicine, 2017).
• A 2022 meta-analysis of mind-body practices found yoga produced the largest HbA1c reduction, about 1%, and each extra weekly yoga session was associated with a further 0.22% drop (Healio).

Daily routine (dinacharya) for prameha

• Rise early and avoid daytime sleep, which increases kapha
• Exercise daily to the point of light sweating, adjusted to strength and complications
• Dry powder massage (udvartana) and regular bathing, both of which counter the aversion to bathing and movement listed among the causes
• Keep the mind engaged and avoid prolonged sitting; inactivity of body and mind is itself a listed cause
• Eat only after the previous meal is digested

Diabetes complications through an Ayurvedic lens (upadrava)

Ayurveda traces nearly all long-term diabetes complications to one mechanism: medah-kaphaavrita vata, where fat and sticky kapha obstruct vata in a specific channel. The channel affected decides the complication, and clearing that obstruction is the treatment principle.

Excess kleda makes blood more viscous and slows circulation. The channels work harder to compensate, which weakens them (kha-vaigunya). Glucose-laden kapha, carried by hot, salty, sour or pungent causes, then deposits at those weak points. Salt’s penetrating quality is singled out as driving deposits into blood vessels and nerves.

Complication	Ayurvedic interpretation
Heart disease, stroke, nephropathy (macro- and microvascular)	Medah-kaphaavrita vata leading to marmaaghaata (injury to vital organs)
Peripheral neuropathy: numbness, tingling, burning feet	Kaphaavrita vata in the nerve channels; vyana dushti
Kidney failure and uraemia	Marmaaghaata with shopha (generalised swelling) and udaavarta
Recurrent infections, abscess, carbuncles	Saama dosha, vidradhi, pidaka; ojas dysfunction and fat-obstructed, oxygen-poor tissues
Itching, fungal infections, dark velvety skin (acanthosis nigricans)	Kapha-pitta skin disease (dadru); sneha-kleda in the skin with udana dysfunction
Dim vision	Prana dushti
Diabetic ketoacidosis	Amleeka: tissues starved of glucose switch to fat, making the blood acidic; prana and samana dushti
Hyperosmolar hyperglycaemic state	Severe prana dushti with extreme thirst from blood overloaded with sugar and salts

Hypoglycaemia is more dangerous than high sugar

A key point for anyone combining Ayurveda with insulin: depletion of a dosha is more dangerous than its excess. Low blood sugar is therefore more serious than high blood sugar.

Warning signs include a racing heart, palpitations, sweating and pallor (vyana features), and headache, dizziness, visual changes, hunger, seizures and coma (prana features). Anyone on insulin or sulfonylureas who adds glucose-lowering herbs must monitor closely for these.

Monitoring and safely combining Ayurveda with modern care

Ayurvedic treatment for diabetes is safest and most effective as part of integrated care: lab-monitored, coordinated with your doctor, and using quality-tested medicines.

What to monitor

Area	Tests	Vayu assessed
Glucose control	Fasting plasma glucose, HbA1c	Samana, prana
Eyes	Visual acuity, fundoscopy	Prana
Sensory nerves	Touch, pinprick, vibration sense	Vyana
Motor nerves	Deep tendon reflexes	Vyana
Heart and circulation	Blood pressure, peripheral pulses	Vyana
Kidneys	Creatinine, urine albumin	Apana

Five safety rules

1. Never stop prescribed medication on your own. Type 1 diabetes always needs insulin and is classed as incurable by Ayurveda alone.
2. Tell both doctors everything you take. Glucose-lowering herbs added to insulin or sulfonylureas can cause hypoglycaemia; doses may need adjusting as sugars improve.
3. Check blood sugar more often when starting or changing any Ayurvedic medicine.
4. Buy from licensed, tested manufacturers. A JAMA study found about one in five Ayurvedic medicines bought online contained detectable lead, mercury or arsenic, with metal-processed (rasa shastra) products more than twice as likely to contain them (Saper et al., 2008). Avoid unlabelled powders and products with no batch testing.
5. Watch the liver and kidneys. Periodic liver and kidney function tests are sensible for anyone on long-term herbal medicines, especially with existing kidney disease.

When to see a doctor urgently

Seek emergency care for confusion, drowsiness, deep rapid breathing, fruity-smelling breath, persistent vomiting, severe thirst with very high readings, or symptoms of low sugar that do not resolve with glucose. These can signal ketoacidosis, a hyperosmolar state or severe hypoglycaemia.

Frequently asked questions

Sources and References

1. Chattopadhyay K, et al. Effectiveness and Safety of Ayurvedic Medicines in Type 2 Diabetes Mellitus Management: A Systematic Review and Meta-Analysis. Frontiers in Pharmacology, 2022.
2. Devangan S, et al. The effect of Gymnema sylvestre supplementation on glycemic control in type 2 diabetes patients. Phytotherapy Research, 2021.
3. Nisha-Amalaki capsules in prediabetes: a randomized, placebo-controlled trial. PubMed Central.
4. Chhabra A, Kuchewar V. Comparison of Nisha-amalaki and Metformin in Overweight and Obese Patients with Type 2 Diabetes Mellitus. JCDR, 2024.
5. Setia M, et al. Antidiabetic potential of AYUSH 82 dosage forms. Journal of Drug Research in Ayurvedic Sciences.
6. Department of Science & Technology. License agreement for commercialization of Ayush-82.
7. Medical Dialogues. BGR-34 shows therapeutic efficacy in newly diagnosed Type 2 diabetes in BHU trials.
8. Ayurveda-based anti-diabetes medicine by CSIR; CCRAS activities on diabetes.
9. Thind H, et al. The effects of yoga among adults with type 2 diabetes: a systematic review and meta-analysis. Preventive Medicine, 2017.
10. Healio. Mindfulness, yoga as strong as drug therapy plus lifestyle intervention in type 2 diabetes, 2022.
11. Mohan V, Anjana RM, Tandon N. Lessons learnt from the ICMR–INDIAB study. National Medical Journal of India, 2023.
12. The Tribune. 60% of diabetes reversible: ICMR chief on 101 million diabetics in India, 2023.
13. Saper RB, et al. Lead, Mercury, and Arsenic in US- and Indian-Manufactured Ayurvedic Medicines Sold via the Internet. JAMA, 2008.