Why your period hurts, and what food can actually do about it

For something so common, period pain is remarkably under-discussed. Most of us were handed a packet of painkillers and told it was just part of being a woman. The research tells a more useful story, and food plays a bigger role in it than you might expect.

Just how common is it?

Period pain, or dysmenorrhoea, is not a minor issue affecting a few unlucky people. A 2026 systematic review and meta-analysis that pooled data across 70 countries put the worldwide prevalence at roughly 71%.1 A large study of more than 21,000 young women found a strikingly similar figure, and went further: about one in five reported missing school or university because of the pain, and 41% said it hurt their concentration or performance in class.2

This is not something to quietly endure. It is a health issue that affects how women learn, work and live, every single month.

Why does it hurt in the first place?

Most period pain is driven by prostaglandins, hormone-like compounds your body releases to help the uterus contract and shed its lining. Higher prostaglandin levels mean stronger contractions, less blood flow to the muscle, and more pain. Prostaglandins are also inflammatory, which is part of why an anti-inflammatory approach to eating shows up again and again in the research.

What the evidence says food can do

Omega-3 fatty acids

This is where the evidence is strongest. A 2023 systematic review and meta-analysis of 12 randomised controlled trials, covering 881 women, found that omega-3 long-chain fatty acids taken over two to three months produced a large reduction in menstrual pain.3 A separate meta-analysis reached the same conclusion, reporting a substantial drop in the severity of primary dysmenorrhoea.4

One of the clearest individual trials was a double-blind, placebo-controlled crossover study: after three months of omega-3, women reported markedly less pain, and crucially, needed fewer rescue doses of ibuprofen than when they took a placebo.5 In practice that means oily fish and, where relevant, a quality omega-3 source in your diet.

Magnesium

Magnesium is involved in muscle relaxation, which is exactly what a cramping uterus needs. It also appears repeatedly in the premenstrual-symptom literature, often paired with vitamin B6, where it is linked to steadier mood and fewer symptoms in the days before a period.6 Magnesium-rich foods, like dark leafy greens, beans, nuts and wholegrains, are an easy, low-risk place to start.

An anti-inflammatory pattern overall

Because prostaglandins are inflammatory, an eating pattern that is generally rich in vegetables, fibre, omega-3 fats and antioxidants, and lighter on ultra-processed food, gives your body less to fight against. It is not a single magic ingredient; it is the overall pattern that matters.

What to actually eat

• During your period: iron-rich foods (beans, leafy greens, red meat if you eat it) paired with vitamin C for absorption, plus oily fish or another omega-3 source.
• Every day: plenty of vegetables and fibre, magnesium-rich foods, and water.
• Worth easing off: very high intakes of ultra-processed and sugary foods, which push the body toward inflammation.

When food is not enough

This matters: diet is a lever, not a cure. Severe period pain, pain that stops you functioning, or pain that has suddenly changed can be a sign of an underlying condition such as endometriosis, which takes seven to nine years to diagnose on average.7 If that sounds like you, please see a clinician. Food can help with the everyday. It should never replace medical care when your body is telling you something is wrong.