Amla and health: who should be careful about eating Indian gooseberry

On 21 January 2026 the lifestyle desk of the Bangladeshi news site Jagonews24 published a short guide on who should be careful about eating amla, the sour green fruit also called amloki, Indian gooseberry or emblic (Phyllanthus emblica). The report described amla as a natural store of vitamin C that is valued for immunity, for skin and hair and for digestion, but warned that a useful food is not equally safe for everyone. It named five groups that should take care: people with gastric problems, acidity or peptic ulcers; people at risk of kidney stones; people with diabetes who eat amla as pickle, morabba or sweetened juice; people with low blood pressure; and people with anaemia who take iron supplements. It closed by saying that amla is healthy but is not a medicine, and that anyone with a gastric, kidney or blood pressure problem or another long-term illness should consult a doctor or nutritionist before eating it regularly. The report named the National Institute of Nutrition and the Harvard T.H. Chan School of Public Health as its sources.

The sections below set each of those cautions beside what health authorities and published clinical research had said by January 2026: the US National Institutes of Health (NIH), the UK National Health Service (NHS), the World Health Organization (WHO), Health Canada, the Food Composition Table for Bangladesh and peer-reviewed studies. Some of the report's points are supported; on others the evidence is thinner than the report suggested, or points the other way. None of it replaces a doctor's advice for a particular person.

Phyllanthus emblica is a deciduous tree of the family Phyllanthaceae whose native range is tropical and southern Asia. It is a small to medium tree, usually 1 to 8 metres tall, with small light-green leaves set closely along thin branchlets so that each shoot looks like a feathery compound leaf. The flowers are greenish-yellow, and March and April are the main flowering months. The fruit is nearly round, light greenish-yellow, smooth and hard, with six faint vertical furrows, and grows to about 26 millimetres across. Wild fruits weigh about 5.5 grams, while cultivated fruits average roughly 28 to 56 grams. The taste is sour, bitter and astringent, and the flesh is fibrous; the bitterness is linked to tannins called ellagitannins, among them emblicanin A, emblicanin B, punigluconin and pedunculagin.

In Bangladesh the tree is listed in the Plants Red List of Bangladesh, published through the Forest Department, under the local names amloki, amla, ambolati and amloti (the Chakma name), with the English names emblic myrobalan and Indian gooseberry. The assessment places it in the category Least Concern. A 2022 scientific review in the journal Antioxidants describes the fruit as mainly found in India, Southeast Asia, China, Iran and Pakistan, and notes its long use in the traditional medicine of India.

Across South Asia the fruit is eaten raw or cooked. It is often pickled with salt, oil and spices, added to dishes such as dal, and made into murabba, in which the fruits are soaked in sugar syrup until they are candied. In Ayurveda it is one of the three fruits of the mixture called triphala. Health Canada's monograph on amla products, dated 28 March 2025, lists the traditional Ayurvedic uses that licensed products may name on their labels: a rejuvenating tonic (rasayana), relief of heartburn and indigestion associated with hyperacidity (amlapitta), a digestive tonic, a mild laxative and an eye tonic, as well as a source of antioxidants. These are statements about traditional use that the regulator permits on labels, not findings from clinical trials.

The report's starting point, that amla is very rich in vitamin C, is borne out by Bangladesh's own nutrient tables. The Food Composition Table for Bangladesh, compiled by the Institute of Nutrition and Food Science at the University of Dhaka and published in 2013, gives the following values for 100 grams of the edible part of raw amloki:

• Energy: 44 kilocalories (186 kilojoules)
• Water: 86.7 grams
• Protein: 0.8 grams; fat: 0.1 grams
• Available carbohydrate: 8.3 grams; dietary fibre: 3.4 grams
• Calcium: 32 milligrams; iron: 0.9 milligrams; potassium: 225 milligrams
• Vitamin C: 453.4 milligrams

In the same table raw green guava, a fruit often named as a vitamin C source, carries 228.3 milligrams per 100 grams. The 2022 review in Antioxidants found that studies of different amla varieties reported between 193 and 720 milligrams of vitamin C per 100 grams of fresh fruit, so the amount depends on the variety and on how the fruit is measured. Besides vitamin C, the fruit contains polyphenols such as gallic acid, ellagic acid and a range of tannins, which the review links to its antioxidant activity in laboratory, animal and small human studies.

For comparison, the NIH Office of Dietary Supplements gives the recommended daily intake of vitamin C for adults aged 19 and over as 90 milligrams for men and 75 milligrams for women, 85 milligrams in pregnancy and 120 milligrams while breastfeeding. People who smoke need 35 milligrams a day more than non-smokers. The tolerable upper intake level, the most a healthy adult can take every day without likely harm, is 2,000 milligrams, and it covers food and supplements together. Vitamin C dissolves in water and is destroyed by heat, so long storage and cooking lower the amount in food. Lack of vitamin C over many weeks causes scurvy.

The Harvard T.H. Chan School of Public Health, one of the report's named sources, explains in its Nutrition Source guide that the gut has a limited capacity to absorb vitamin C: absorption falls to less than half when more than 1,000 milligrams is taken at once, and once the body's tissues are saturated the excess leaves in the urine. It notes that adverse effects become possible at intakes above 3,000 milligrams a day, including diarrhoea, more kidney stones in people who already have kidney disease or a history of stones, higher uric acid, and greater iron absorption and overload in people with hemochromatosis. Those figures concern very large intakes, which mostly come from supplements and concentrated products rather than from fruit eaten as part of a meal.

The report's first warning was for people with gastric problems, acidity or peptic ulcers. It said amla is high in vitamin C and natural acids, and that eating too much can increase stomach burning, heartburn, acidity or pain. The US National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), part of the NIH, lists the foods most commonly linked with symptoms of gastro-oesophageal reflux disease (GERD): acidic foods such as citrus fruits and tomatoes, alcoholic drinks, chocolate, coffee and other sources of caffeine, high-fat foods, mint and spicy foods. It advises people with reflux to talk with their doctor about foods that seem to make symptoms worse; the doctor may suggest cutting down or avoiding certain foods to see whether symptoms improve.

The NHS gives similar advice for heartburn and acid reflux. It says these can be caused or made worse by certain food and drink, such as coffee, tomatoes, alcohol, chocolate and fatty or spicy foods, and advises people not to have food or drink that triggers their symptoms, to eat smaller and more frequent meals, and not to eat within three or four hours before bed. It advises seeing a GP if lifestyle changes and pharmacy medicines do not help, if heartburn happens on most days, or if there are other symptoms such as food getting stuck in the throat, frequent vomiting or unexplained weight loss. Very high doses of vitamin C can themselves upset the stomach: the NIH fact sheet lists diarrhoea, nausea, abdominal cramps and other digestive complaints as the most common effects of high doses, caused by vitamin C that is not absorbed.

On stomach ulcers, the NHS names the main causes as infection with Helicobacter pylori bacteria and regular use of anti-inflammatory painkillers such as ibuprofen; ulcers are also more common in smokers. Among the self-help steps it lists is avoiding food or drink that triggers symptoms. It says vomiting blood, vomit that looks like coffee grounds, or black, sticky stools need emergency care.

The research on amla itself does not show that it harms people with reflux. A double-blind, placebo-controlled trial published in 2018 in the Journal of Integrative Medicine followed 68 patients in Iran with non-erosive reflux disease. Those given amla tablets after meals for four weeks had a greater fall in the frequency and severity of heartburn and regurgitation than those given a placebo. Health Canada, for its part, lists a laxative effect as a known reaction to amla products. Reactions vary from person to person, so the practical advice from the NHS and NIDDK applies: anyone whose heartburn or stomach pain is worse after sour foods such as amla should cut down, and persistent symptoms need a doctor.

The report advised people at risk of kidney stones to limit amla, saying that oxalate-type compounds in the fruit could raise the risk, especially for those who have had stones before. The health authorities consulted for this article do not name amla among high-oxalate foods. NIDDK says drinking enough liquid, mainly water, is the most important thing a person can do to prevent kidney stones. For people who have had calcium oxalate stones it suggests avoiding foods that raise oxalate in the urine, naming nuts and nut products, peanuts, rhubarb, spinach and wheat bran, and asks them to discuss other oxalate sources with a health professional. It also advises reducing sodium, limiting animal protein and getting enough calcium from food, because calcium in the right amount binds oxalate in the gut. It recommends that anyone who has had a stone find out what type it was, because the advice differs for calcium oxalate, calcium phosphate, uric acid and cystine stones.

The better-documented link runs through vitamin C. The NIH fact sheet says high vitamin C intakes can increase the oxalate and uric acid passed in urine, which could contribute to kidney stones, especially in people with kidney disorders. Studies of intakes from 30 milligrams to 10 grams a day have given conflicting results, so it is not clear whether vitamin C actually causes stones; the best evidence that it does is in people who already have high urinary oxalate (hyperoxaluria). The Harvard guide likewise puts the risk at intakes above 3,000 milligrams a day and in people with existing kidney disease or a history of stones.

For a reader this means that people who have had kidney stones, especially calcium oxalate stones, or who have kidney disease, should ask their doctor or a dietitian before taking amla in large amounts, as juice concentrates or powders, or alongside vitamin C supplements.

The report said amla is generally useful for people with diabetes, but that eating it in excess or as pickle, morabba or sweetened juice can upset blood sugar because these products carry a lot of sugar and salt. Research supports the first half of that statement only cautiously. The 2022 review in Antioxidants describes clinical trials in which amla powder lowered blood glucose in patients with diabetes, one after 21 days and another after 90 days of daily use, and one in which a flavonoid-rich amla extract reduced the risk of nerve damage (neuropathy). The review concludes that amla may help in managing blood glucose and insulin levels, but says more studies in animals and people are needed. Because amla powders and extracts were seen to lower blood glucose in these trials, people who take medicines for diabetes should tell their doctor before using them regularly.

The second half of the warning matches international advice. The WHO's healthy diet guidance, published in April 2020, recommends keeping free sugars below 10 per cent of total energy intake, which it equates to about 50 grams, or 12 level teaspoons, a day for a person of healthy weight eating about 2,000 kilocalories, and ideally below 5 per cent. Free sugars include sugar added by the maker, cook or consumer, and the sugars naturally present in honey, syrups and fruit juices, so both candied murabba and sweetened amla juice count. The WHO also advises adults to eat less than 5 grams of salt a day, about one teaspoon, and to use iodised salt.

Bangladesh's own Dietary Guidelines, first issued in 2000 and revised in 2013 by the Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders (BIRDEM) with technical support from FAO, carry the same messages: limit salt and condiments and use only iodised salt, and eat less sugar, sweets and sweetened drinks. In the guidelines' food pyramid, vegetables and fruits sit on the second level, to be eaten liberally, while fats, oils and sugar sit at the top, to be eaten sparingly. The NHS advice for people with type 2 diabetes is to eat a healthy diet that includes fruit and vegetables and not to eat too much processed food with a lot of salt and sugar.

The report said amla helps to lower blood pressure, so people whose blood pressure is already low might feel dizzy or weak if they eat large amounts regularly. The clinical evidence for a blood pressure effect is mixed. A systematic review and meta-analysis published in 2023 in BMC Complementary Medicine and Therapies by researchers at the University of British Columbia pooled nine randomised controlled trials with 535 participants, in all of which amla was taken as capsules. It found significant falls in LDL cholesterol, VLDL cholesterol, triglycerides and the inflammation marker hs-CRP compared with placebo, but no significant effect on systolic or diastolic blood pressure. No trial reported an adverse event serious enough to stop the study early, and the authors asked that their results be read with caution because the trials differed widely.

Individual trials point in different directions. In a trial at the Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER) in Puducherry, India, published in 2021, 150 patients with essential hypertension took an amla extract or a placebo alongside their usual medicines for 12 weeks; the extract had a good safety profile but produced no additional fall in blood pressure. A trial in Tabriz, Iran, included in the 2023 review, reported a significant fall in both systolic and diastolic pressure among 81 adults with uncontrolled hypertension. In a 2015 study at Ohio State University, 15 overweight adults who took an amla extract for 12 weeks had an average systolic pressure of 117 mmHg both before and after.

The NHS defines low blood pressure as a reading below 90/60 mmHg. It says low blood pressure does not always cause symptoms, but lists lightheadedness or dizziness, feeling sick, blurred vision, weakness, confusion and fainting as signs that it may be too low, and advises seeing a GP if such symptoms keep happening. Its self-help advice is to get up slowly, eat small and frequent meals and drink more water. Since the evidence does not show that amla eaten as food lowers blood pressure in a dependable way, the more practical caution concerns people who already take blood pressure medicines and want to add concentrated amla supplements; they should ask their doctor.

The report said that amla helps the body absorb iron, but that taking a lot of it together with iron supplements can cause stomach discomfort in some people. The first part is well established: the NIH fact sheet says vitamin C improves the absorption of non-haem iron, the form of iron found in plant foods. The NHS advice on iron deficiency anaemia makes the same point in practical form, saying that drinking orange juice after taking an iron tablet may help the body absorb the iron. Amla itself carries little iron, 0.9 milligrams per 100 grams in the Bangladesh food table.

The stomach discomfort is mainly a known effect of the iron tablets. The NHS lists constipation or diarrhoea, tummy pain, heartburn, feeling sick and darker than usual stools as side effects some people get, and says taking the tablets with or soon after food can reduce them. Treatment usually lasts about six months, and the NHS asks patients to keep taking the tablets even if side effects occur and to follow their GP's advice on how to take them. It also asks people to eat and drink less tea, coffee, milk and dairy and foods high in phytic acid such as wholegrain cereals, because large amounts make it harder to absorb iron, and warns that iron tablets must be kept out of the reach of children, since an overdose in a young child can be fatal.

There is also a group for whom extra iron absorption is the danger rather than the aim. The NIH says that in people with hereditary hemochromatosis, a condition in which the body stores too much iron, long-term high doses of vitamin C could make iron overload worse and lead to tissue damage. People with this condition should ask their doctor before taking vitamin C or amla supplements.

Beyond the five groups in the report, the research and regulatory documents point to people who take certain medicines or concentrated amla products. Amla extract has been shown to reduce the clumping of blood platelets. In a crossover study published in Phytomedicine in 2014 by doctors at Nizam's Institute of Medical Sciences in Hyderabad, India, ten patients with type 2 diabetes took amla extract, the anti-clotting drugs clopidogrel or aspirin, or combinations of them. All treatments, alone and combined, reduced platelet aggregation and lengthened bleeding and clotting time compared with the start; all were well tolerated. The 2015 Ohio State study likewise found that platelet aggregation fell after 12 weeks of an amla extract. People who take blood thinners or antiplatelet medicines should therefore talk to their doctor before taking amla extracts or powders.

Health Canada's monograph covers dried amla, powders and extracts sold as natural health products, not the fruit eaten as food. It requires labels to tell users to ask a health care practitioner before use if they are breastfeeding, and, for products giving more than 3 grams of amla a day, if they are pregnant. It asks users to take amla products a few hours before or after other medicines or health products, warns that a laxative effect may occur, and says products used as laxatives should not be used by anyone with a fever or undiagnosed digestive trouble. The NIH adds that vitamin C supplements may interact with radiation therapy and with medicines including some cancer drugs and statins, and that people undergoing chemotherapy or radiation should consult their oncologist before taking vitamin C or other antioxidant supplements, especially in high doses.

The report's closing advice is consistent with these sources. The sources consulted here treat amla as a nutritious food with promising but still limited research behind its health claims, not as a medicine. Anyone with a gastric, kidney or blood pressure problem, diabetes, anaemia or hemochromatosis, anyone who is pregnant or breastfeeding, and anyone on regular medicines should see a doctor or a qualified nutritionist before eating amla in large amounts every day or taking amla or vitamin C supplements.

Photo: Mazhar Zarif / Wikimedia Commons (CC BY-SA 3.0)

Sources: Jagonews24 (21 January 2026), NIH Office of Dietary Supplements (Vitamin C fact sheet, updated July 2025), NIDDK, NHS, World Health Organization (Healthy diet, April 2020), Health Canada (Amla monograph, March 2025), Institute of Nutrition and Food Science, University of Dhaka (Food Composition Table for Bangladesh, 2013), Harvard T.H. Chan School of Public Health (The Nutrition Source), FAO (Dietary guidelines for Bangladesh), Plants Red List of Bangladesh, Antioxidants (2022), Journal of Integrative Medicine (2018), Phytomedicine (2014), Journal of Medicinal Food (2015), Phytotherapy Research (2021), BMC Complementary Medicine and Therapies (2023), Wikipedia