PMS: what actually helps

Walk into any health shop and you will find a shelf of things for PMS. Very little of it has been tested properly, and the handful that has does not get the loudest shelf space.

This is the integrative version — which is not the same as the natural version. It means using whatever actually works, and being straight about which things those are.

Calcium has the best evidence

This surprises people, because it is unglamorous and cheap. A systematic review of herbs, vitamins and minerals for PMS found calcium the only one with good-quality evidence behind it, supported by two well-conducted randomised trials.

It is not dramatic, and it will not do anything for you in one cycle. It is simply the supplement with the strongest case, and most women's intake is lower than they assume once dairy is not a big part of the day.

Chasteberry is second, and genuinely promising

Chasteberry — vitex agnus-castus — came out of the same review with evidence of possible effectiveness from two good-quality trials. That is a weaker finding than calcium's but stronger than almost everything else on the shelf.

It is worth knowing that it can interact with hormonal contraception and with some medications affecting dopamine, and it is not for use in pregnancy. This is one to mention to your provider rather than start quietly.

"Natural" and "no interactions" are not the same thing. Chasteberry is a real intervention, which is precisely why it might work and precisely why it needs saying out loud at an appointment.

Vitamin B6 — maybe, with a ceiling

B6 shows some effect in trials, though the evidence is less consistent. The important part is the upper limit: taken at high doses over long periods it can cause nerve damage, which is genuinely not rare in people who have been self-dosing for years.

If you try it, stay within the recommended upper limit and treat it as a trial with an end date rather than something you take forever.

The unglamorous things that work

• Regular movement across the whole month, not just the difficult week
• Sleep, which is the single biggest amplifier of premenstrual mood symptoms when it is short
• Reducing alcohol, which worsens both sleep and mood in the luteal phase
• Eating regularly — long gaps make the irritability materially worse
• Knowing it's coming, which sounds trivial and is not. Half of what makes premenstrual weeks hard is believing something is wrong with your life rather than your cycle

Track before you treat

Two or three months of noting symptoms and dates will tell you more than any supplement, because it answers the question that decides everything else: are these symptoms actually tied to your cycle?

If they are, they clear within a few days of bleeding starting and are absent in the week after. If they are present all month, this is not PMS and treating it as PMS will not work.

When it's PMDD

Premenstrual dysphoric disorder is not a worse version of PMS in the way a bad cold is a worse version of a mild one. It is a distinct diagnosis, the symptoms are severe and largely psychological, and it can be genuinely disabling for a week or more each month.

Hopelessness, rage that frightens you, or feeling unable to function are not things to manage with calcium. They are things to take to a doctor, and there are effective treatments.

Any thought of harming yourself is an urgent conversation, not a cycle to wait out.

The integrative rule underneath

Address sleep, food, movement and stress first, because they affect everything and cost nothing. Then add the one or two supplements with actual evidence. Then, if it is still ruining a week of every month, go and get medical help without feeling you have failed at doing it naturally.

That order is the whole method. It is not a preference for one kind of medicine over the other.