The Prostate-Friendly Diet: What Helps, What Does Not

Before you buy anything, it is worth knowing that some of the most reliable ways to reduce urinary symptoms cost nothing. They are also the ones that get the least attention, because there is no product attached to them.

The four changes with the best return

1. Lose excess weight, particularly around the middle

This is the strongest lifestyle association in the field. Obesity, and central obesity especially, is consistently linked to larger prostate volume and worse urinary symptoms. The proposed reasons are hormonal — body fat converts testosterone to oestrogen, and insulin resistance appears to promote prostate growth. It is slow, it is hard, and it does more than anything else on this page.

2. Move regularly

Physically active men report fewer and less severe lower urinary tract symptoms than sedentary men, and the effect holds after adjusting for weight. Even moderate walking counts. Long uninterrupted sitting appears to work the other way.

3. Fix your evening fluid timing

If night-time urination is your main complaint, this is the single highest-yield change and it works within days. Stop drinking fluids about two hours before bed, move your larger drinks to earlier in the day, and if you take a diuretic, ask your doctor whether the timing can shift. Elevating your legs in the early evening helps some men, by clearing fluid that would otherwise mobilise once you lie down.

4. Moderate alcohol and evening caffeine

Both are bladder irritants and both are diuretics. You do not have to give either up; you do have to stop having them at 9pm.

What to eat

There is no prostate diet as such. What the evidence points to is a broadly Mediterranean pattern, and the signal is stronger for cardiovascular and metabolic health than it is for the prostate specifically — which is fine, because those are the things driving the problem anyway.

• Vegetables, particularly cruciferous ones like broccoli and cauliflower.
• Cooked tomatoes — lycopene is better absorbed with heat and fat, so a tomato sauce beats a raw tomato. The evidence for lycopene supplements specifically is weak and inconsistent; the evidence for eating the food is more reassuring.
• Oily fish for omega-3s, in place of some red and processed meat.
• Nuts, seeds and olive oil — naturally rich in the phytosterols discussed in our beta-sitosterol guide.
• Green tea and coffee in moderation, and not in the evening.

What is overhyped

A few things deserve a sceptical note:

• Cancer-prevention claims. The largest trial ever run on selenium and vitamin E for prostate cancer prevention, SELECT, found no benefit — and its follow-up found that high-dose vitamin E was associated with a higher rate of prostate cancer diagnoses. Be wary of any product implying otherwise.
• Soy and dairy panic. The evidence on both is inconsistent and does not support dramatic dietary restriction.
• Detoxes and alkaline diets. No mechanism, no evidence.

Where supplements fit

On top of the above, not instead of it. If the fundamentals are in place and you still want to try a botanical, that is a reasonable next step — we compare the options in our roundup of the best prostate supplements, and set out what the trials really found for saw palmetto. And if your symptoms are more than mild, the fundamentals plus a doctor beats the fundamentals plus a capsule. Check them against the symptom list first.