Milk, Curd and Dairy in Psoriasis: What the Evidence Says

Milk, curd and other dairy foods do not cause psoriasis, and good research has not shown that cutting them out helps most people. The evidence so far is mixed and mostly weak. A few people do notice their skin or stomach feels better with less dairy, so the practical answer is to watch your own body rather than follow a blanket rule.

Dairy is part of almost every Indian kitchen, from morning chai to dahi-chawal and paneer on special days. So when someone with psoriasis hears "give up milk", it is a big change. This guide is part of our Psoriasis Diet for Indians series, and looks at what the studies actually say.

What the research says about dairy and psoriasis

Dairy has been studied far less than alcohol, smoking or body weight. Here is what we found when we looked at the studies.

The expert diet review

In 2018 the Medical Board of the US National Psoriasis Foundation published dietary recommendations in JAMA Dermatology, based on a review of 55 studies. Their one strong recommendation was weight loss through a lower-calorie diet for adults who are overweight or obese. They gave weaker support to a gluten-free diet only for people with blood tests showing gluten sensitivity. Dairy was not singled out as something to avoid. The board also stressed that diet should add to, not replace, medical treatment [1].

What patients report

A 2017 survey of 1,206 people with psoriasis in the US asked what changes they had tried. The most common changes people said helped were cutting alcohol, gluten and nightshade vegetables, and adding fish oil, vegetables and vitamin D [2]. This was a self-reported survey of foundation members, so it cannot prove cause and effect. Dairy was not among the top changes reported to help.

The cheese surprise

A 2025 analysis of UK Biobank data compared about 10,900 people with psoriasis with more than 4.8 lakh people without it. People who ate more cheese each week, and drank tea daily, were slightly less likely to have more severe psoriasis [3]. The effect was small, and "severity" was judged from the medicines people took. A 2024 genetic study (a "Mendelian randomization" study) also hinted that cheese might be linked to lower psoriasis risk, but its other analysis methods did not agree, so this result is uncertain [4].

In simple words: there is no sign that dairy is a major villain, and the hints that it might help are too weak to act on.

Saturated fat and the bigger picture

A 2025 King's College London study of 257 adults with psoriasis found that people who ate more fruit, vegetables, whole grains and low-fat dairy, and less red and processed meat, tended to have milder psoriasis [5]. This points to the overall pattern of your plate mattering more than one food. Full-cream milk, malai, butter and fried paneer snacks add a lot of saturated fat and calories, which matters because extra weight is clearly linked to more active psoriasis. Read more in our guide to weight and psoriasis.

Lactose intolerance: common in India, often confused with a "flare"

Many adults lose some of their ability to digest lactose, the natural sugar in milk. An Indian multicentre study in 1981 found lactose intolerance in about 66.6% of volunteers from South India and 27.4% from North India [6]. Later Indian research suggests the numbers vary widely between studies and regions.

Signs of lactose intolerance include bloating, gas, loose motions or cramps within a few hours of drinking milk. These are gut symptoms. They do not prove dairy affects your skin, but feeling unwell and sleeping badly can add to stress, and stress is a known psoriasis trigger.

Helpful points if milk upsets your stomach:

• Curd (dahi), chaas and aged cheese usually have less lactose than milk, and many people tolerate them better.
• Small amounts spread through the day are easier than a big glass at once.
• Lactose-free milk is now sold in many Indian cities.
• If symptoms are severe or you lose weight, see a doctor. They can check for other gut problems.

Curd, buttermilk and probiotics

Curd contains live bacteria, and there is growing interest in the gut and skin connection. One well-designed trial in Spain gave 90 adults with plaque psoriasis either a probiotic capsule or a dummy capsule for 12 weeks, alongside their usual steroid creams. More people in the probiotic group reached a 75% improvement in their psoriasis score (66.7% compared with 41.9%) [7].

This is encouraging, but remember: it used specific strains in capsule form, not home-set dahi, and everyone was also using prescribed creams. We cannot say that eating curd will do the same. Plain, unsweetened curd is still a healthy food for most people. Our article on probiotics for psoriasis and the one on gut health and psoriasis go deeper.

What Ayurveda says about milk

In Ayurveda, skin diseases (kushtha) are discussed alongside viruddha ahara, or incompatible food combinations. The Charaka Samhita lists combinations such as milk with fish, and milk with sour fruits, as unsuitable. It also links certain incompatible combinations, such as milk taken after radish or garlic, with kushtha [8]. This is why many Indian families and vaidyas advise against milk with fish, or fruit milkshakes made with sour fruits.

These are traditional teachings. They have not been tested in modern trials for psoriasis. Following them is unlikely to cause harm, as long as your overall diet still gives you enough protein and calcium. If you are seeing an Ayurvedic doctor, they may give you advice based on your prakriti and digestion. That is a personal assessment, not a rule for everyone.

How to test whether dairy affects you

If you feel dairy may be a trigger for you, a careful trial is better than cutting it out forever.

1. Keep a diary for 2 weeks first. Note what you eat, your stress, sleep, weather and how your skin and stomach feel.
2. Remove one thing at a time. For example, stop plain milk for 3 to 4 weeks but keep curd. Changing many foods together makes it impossible to tell what helped.
3. Replace the nutrients. Get calcium and protein from ragi, til (sesame), rajma, chana, soya, tofu and green leafy vegetables. Talk to a dietitian if you are vegetarian, since dairy may be your main protein source.
4. Reintroduce and watch. Bring dairy back and see if anything changes over 1 to 2 weeks.
5. Keep your treatment the same. Continue your prescribed medicines and daily moisturising throughout, so you are only testing one change.

Psoriasis naturally comes and goes, so one good or bad week does not prove much. Look for a pattern.

Practical dairy tips for Indian kitchens

• Choose toned or double-toned milk over full-cream if you are trying to lose weight.
• Prefer plain curd and chaas over sweetened lassi, mishti doi or flavoured yoghurt cups, which can be high in sugar.
• Grill or add paneer to sabzi rather than deep-frying it as pakoras.
• Use ghee and butter in small amounts. They are calorie-dense even though ghee has a respected place in Ayurveda.
• Limit chai sweetened with lots of sugar. Several cups a day add up.
• Do not give up dairy for a child with psoriasis without speaking to their paediatrician, since children need calcium for growing bones.

When to see a doctor

Diet changes are not a substitute for medical care. See a dermatologist promptly if:

• Your psoriasis is spreading quickly or covers a large part of your body.
• Your skin turns red all over, or you have fever, chills or pus-filled spots. These can be signs of erythrodermic or pustular psoriasis, which need urgent care.
• Your joints are swollen, stiff or painful, especially in the morning.
• You have ongoing diarrhoea, blood in your stool or weight loss after dairy or other foods.
• You are pregnant or breastfeeding and want to change your diet a lot.
• You feel low, anxious or are avoiding people because of your skin.

Steroid creams, phototherapy, oral medicines and biologics all have a real place in psoriasis care when prescribed and monitored by a doctor. Please do not stop any prescribed treatment because of a diet change.

Frequently asked questions

Is milk bad for psoriasis?

Not for most people, as far as current research shows. There is no good evidence that milk causes or worsens psoriasis. If milk gives you bloating or you notice a pattern with flares, try a short break and track the results.

Can I eat curd (dahi) if I have psoriasis?

Yes, most people can. Plain curd is a good source of protein and calcium, and it is often easier to digest than milk. Avoid heavily sweetened versions.

Is paneer allowed in psoriasis?

Paneer is a good vegetarian protein. Because it is high in fat, enjoy it in sensible portions and choose grilled or curry dishes over fried snacks, especially if you are watching your weight.

Should I drink haldi doodh (turmeric milk) for psoriasis?

A warm cup is fine for most people if you tolerate milk. There is no proof that it improves psoriasis. If you take blood thinners or have gallbladder problems, ask your doctor before taking large amounts of turmeric.

Does a vegan or dairy-free diet help psoriasis?

Some people report feeling better on plant-based diets, but there are no strong trials proving that dairy-free diets improve psoriasis. If you try one, plan it well so you do not miss out on calcium, protein and vitamin B12.

Sources

1. Ford AR, et al. Dietary recommendations for adults with psoriasis or psoriatic arthritis from the Medical Board of the National Psoriasis Foundation. JAMA Dermatology, 2018. Summary: Healio
2. Afifi L, et al. Dietary behaviors in psoriasis: patient-reported outcomes from a U.S. national survey. Dermatology and Therapy, 2017. eScholarship
3. Xu Y, et al. Associations between food intake and psoriasis severity and comorbidity: a cross-sectional analysis using UK Biobank data. Proceedings of the Nutrition Society, 2025. Cambridge Core
4. Lu M, et al. The association between dietary consumption habits and psoriasis: a two-sample Mendelian randomization study. Frontiers in Nutrition, 2024. Frontiers
5. Plant-rich, low saturated-fat diet may help reduce psoriasis severity: study (King's College London, British Journal of Nutrition). DT Next
6. Tandon RK, et al. Lactose intolerance in North and South Indians. American Journal of Clinical Nutrition, 1981. FAO AGRIS
7. Navarro-López V, et al. Efficacy and safety of oral administration of a mixture of probiotic strains in patients with psoriasis: a randomized controlled clinical trial. Acta Dermato-Venereologica, 2019. Acta Derm Venereol
8. Viruddha Ahara (incompatible diet). Charaka Samhita Online. carakasamhitaonline.com

This article is for general information and is not medical advice. Please consult a qualified dermatologist or Ayurvedic doctor for diagnosis and treatment.