Broccoli sprouts

Why it matters

Broccoli is already on this list, so it is fair to ask why the sprouts get their own entry. The answer is concentration. Three-day-old broccoli sprouts contain roughly 10 to 100 times more glucoraphanin, the precursor to sulforaphane, than the mature florets you buy in a bag. A small handful of sprouts delivers what would take a large plate of cooked broccoli.

That matters here because sulforaphane is one of the few plant compounds with a documented effect on how your liver processes oestrogen, which makes this a genuinely hormonal food rather than a generally healthy one.

What's inside

The headline is glucoraphanin, which converts to sulforaphane when the plant cells are damaged by chewing or chopping. You also get indole-3-carbinol, which converts to DIM in stomach acid, plus vitamin C, vitamin K, folate and fibre.

The conversion step matters. Glucoraphanin on its own does nothing; it needs an enzyme called myrosinase, which lives in the same plant but in separate compartments. Chewing breaks those compartments and lets the two meet.

For men

The oestrogen angle is the relevant one. Your liver processes oestrogen down several pathways, and the 2-hydroxy route produces metabolites considered less proliferative than the 16-hydroxy route. Indole-3-carbinol and DIM shift the balance towards the first.

For a man carrying more abdominal fat than he would like, this sits alongside the more important lever. Fat tissue contains aromatase, which converts testosterone into oestradiol, so reducing visceral fat does more than any vegetable. The sprouts help the clearance side of the same equation.

Sulforaphane also activates Nrf2, a pathway governing your body's own antioxidant production, and there is early evidence it supports detoxification of environmental compounds.

For women

The same liver pathway matters more here, because oestrogen metabolism is central to symptoms across the cycle and through perimenopause.

If your pattern is heavy periods, breast tenderness and premenstrual mood swings, supporting oestrogen clearance is a reasonable target. Cruciferous vegetables have been studied for exactly this, and sprouts are the most concentrated form.

The gut side matters too. Oestrogen is sent into the intestine in bile and can be reabsorbed there, a process governed by gut bacteria. Fibre and cruciferous compounds both influence that loop.

How to eat it

Grow them. A jar, a tablespoon of seeds, and four days is all it takes, and home-grown sprouts cost a fraction of shop-bought punnets.

Rinse the seeds, soak overnight, drain, then rinse and drain twice daily. They are ready when the first leaves show, usually day three or four.

Eat them raw. Heat destroys myrosinase, the enzyme needed for conversion. If you do cook them, adding a small amount of raw mustard seed or another raw crucifer restores the enzyme.

A small handful daily is plenty. On eggs, in a sandwich, on top of soup after it has cooled slightly.

Worth knowing

Three honest cautions.

Food safety. Sprouts grow in warm, humid conditions, which also suit bacteria. Use seeds sold for sprouting, keep the jar clean, rinse twice daily, and refrigerate once grown. Pregnant women and anyone immunocompromised are usually advised to cook sprouts or avoid them.

Thyroid. Very large amounts of raw cruciferous vegetables can interfere with iodine uptake. A handful of sprouts is not that quantity, but if you have thyroid disease and eat large amounts raw daily, it is worth mentioning to your doctor.

Sulforaphane supplements vary enormously in whether they contain active myrosinase, and many do not. Food is more reliable.

Bottom line

Broccoli sprouts give you many times the sulforaphane of mature broccoli for the price of a jar and four days of patience — and they act on oestrogen clearance rather than just adding another vegetable.

Related reading: How can men lower high estrogen? and what are the symptoms of estrogen dominance?