Compared
PMDD supplements
PMDD is a severe, cyclical mood disorder, not bad PMS. Supplements can support it. They do not treat it, and we are not going to pretend otherwise.
The context.
PMDD affects an estimated 3 to 8% of menstruating women and involves severe mood symptoms in the luteal phase that lift within days of a period starting. At its worst it is disabling and carries a genuine suicide risk. That framing matters before any conversation about supplements.
The nutrient with the most PMS trial support is calcium, where several studies show reduced symptom scores at around 1,000-1,200mg daily. Magnesium, often paired with B6, has smaller supporting trials for fluid retention and premenstrual anxiety. Omega-3 has some data for mood and period pain.
None of this was studied in PMDD specifically at a scale that would justify calling it treatment. Use it as support while you get proper care, and track your cycle so you and a clinician can see the pattern.
Compared.
Ordered by what they contain, not by what they claim.
| Product | Key actives | Form | Price | Per day | Best for |
|---|---|---|---|---|---|
| Daily Multi Nutrient for WomenWild Nutrition | Iron, Vitamin D3, Vitamin K2, B-complex | Capsule | £30/month | £2.00 | Daily foundational nutrition, Women in their reproductive years, Anyone starting from scratch |
| Wild Nutrition Food-Grown MagnesiumWild Nutrition | Magnesium (food-grown) | Capsule | £24.00 | 80p | Broken sleep, Night-time cramps |
| Wild Nutrition Pure Strength Omega 3Wild Nutrition | EPA, DHA | Softgel | £44.00 | £1.47 | Period pain, Low oily fish intake |
| Wild Nutrition Women's Daily Multi NutrientWild Nutrition | Multivitamin, Iron, Vitamin D | Capsule | £44.00 | £1.47 | UK winter, Low sun exposure, Confirmed low ferritin |
| DR.VEGAN Magnesium GlycinateDR.VEGAN | Magnesium bisglycinate | Capsule | £19.99 | 67p | Broken sleep, Night-time cramps |
| Bare Biology Ready & Rested Magnesium BisglycinateBare Biology | Magnesium bisglycinate 375mg | Capsule | £34.99 | 58p | Broken sleep, Night-time cramps |
| Wild Nutrition Endo SupportWild Nutrition | Magnesium, B vitamins, Botanical blend | Capsule | £46.50 | £1.55 | Nutritional support alongside specialist care |
| ARTAH Essential OmegasARTAH | EPA, DHA | Capsule | £32.00 | £1.07 | Period pain, Low oily fish intake |
| Together Health Algae Omega 3Together Health | Algal DHA, Algal EPA | Softgel | £17.95 | 60p | Period pain, Low oily fish intake |
| Wild Nutrition Premenstrual SupportWild Nutrition | Magnesium, Vitamin B6, Botanical blend | Capsule | £41.00 | £1.37 | Broken sleep, Night-time cramps, Premenstrual symptoms, as a time-limited trial |
| DR.VEGAN Vegan Omega 3DR.VEGAN | Algal EPA, Algal DHA | Capsule | £29.99 | 100p | Period pain, Low oily fish intake |
| Wild Nutrition Menopause ComplexWild Nutrition | Magnesium, Vitamin D, B vitamins, Botanicals | Capsule | £42.00 | £1.40 | Broken sleep, Night-time cramps, UK winter |
| Bare Biology Life & Soul Omega-3 Daily CapsulesBare Biology | EPA, DHA 1,700mg combined | Softgel | £32.95 | - | Period pain, Low oily fish intake |
| DR.VEGAN PMS HeroDR.VEGAN | Chasteberry, Vitamin B6, Magnesium, Ashwagandha | Capsule | £26.99 | 90p | Premenstrual symptoms, as a time-limited trial, Broken sleep, Night-time cramps |
| ARTAH Essential MagnesiumARTAH | Magnesium blend | Capsule | £24.00 | - | Broken sleep, Night-time cramps |
| Together Health Marine MagnesiumTogether Health | Marine-sourced magnesium | Capsule | £8.95 | 30p | Broken sleep, Night-time cramps |
| Viridian Organic Evening Primrose OilViridian Nutrition | GLA from evening primrose oil | Liquid | £23.05 | 58p | Cyclical breast tenderness, as a trial |
| Igennus Triple Magnesium ComplexIgennus Healthcare Nutrition | Magnesium citrate, bisglycinate, taurate | Tablet | £16.95 | 56p | Broken sleep, Night-time cramps |
| Igennus Vegepa EPA with Evening Primrose OilIgennus Healthcare Nutrition | EPA, GLA from evening primrose oil | Softgel | £15.95 | 53p | Period pain, Low oily fish intake, Cyclical breast tenderness, as a trial |
| Viridian High Potency Magnesium BisglycinateViridian Nutrition | Magnesium bisglycinate | Capsule | £16.05 | 54p | Broken sleep, Night-time cramps |
| Igennus Vegan Omega-3 Algae OilIgennus Healthcare Nutrition | Algal DHA 400mg, Algal EPA 200mg | Softgel | £22.95 | 77p | Period pain, Low oily fish intake |
| Cycle Support PackPerelel | Vitamin B6, Magnesium glycinate, Calcium, Chasteberry | Capsule | £42/month | £1.50 | PMS and mild PMDD, Regular menstrual cycles, Wanting cycle-aware support |
| Magnesium EaseThe Nue Co. | Magnesium chloride (topical) | Spray | £35 | £1.17 | Restless legs, Sleep-onset insomnia, Post-workout recovery |
| Magnesium Glycinate 400BetterYou | Magnesium bisglycinate 400mg | Capsule | £18 | 60p | Sleep-onset insomnia, Muscle cramps, Perimenopausal sleep changes |
| Cycle ElixirARTAH | Myo-inositol, Vitamin B6 (P5P), Magnesium, Chasteberry | Powder | £48 | £1.60 | PCOS, PMDD, Irregular cycles |
| Peri-BoostMPowder | Sage, Maca, B-complex, Magnesium, Vitamin D3 | Powder | £55/month | £1.83 | Perimenopause, Hot flushes, Perimenopausal fatigue |
| Liposomal Magnesium BisglycinateElle Sera | Magnesium bisglycinate (liposomal) | Liquid | £40.00 | £1.33 | Trouble falling asleep or staying asleep, Muscle cramps, restless legs or night-time tension, Cycle-related tension and irritability, Anyone who has found other magnesium forms upsetting to the gut |
| Pregnacare MaxVitabiotics | Folic acid 400ug, Vitamin D 10ug, DHA omega-3 | Tablets + capsules | ~£30 | - | Trying to conceive or already pregnant, Anyone who wants folic acid, vitamin D and DHA in one pack |
| Wellwoman OriginalVitabiotics | Iron, B vitamins, Evening primrose oil | Capsule | ~£12 | - | Busy weeks and irregular eating, A general nutritional floor |
| Menopace OriginalVitabiotics | B vitamins, Vitamin D, Zinc | Tablet | ~£10 | - | Filling nutrient gaps in perimenopause, Women who want a non-botanical option |
| Wellwoman MaxVitabiotics | Omega-3 EPA/DHA, Iron, B vitamins | Tablets + capsules | ~£20 | - | Women who do not eat oily fish, Anyone consolidating several supplements |
| Perimenopause Multi-NutrientHealth & Her | Sage, Red clover, Vitamin B6 | Capsule | ~£24 | - | Early perimenopause alongside lifestyle change, Women not yet on HRT |
Prices are the brand's UK list price at the time of writing and change often. Cost per day is calculated from pack size and the label's daily serving, and is shown only where both are published.
What to look for.
- B6 at 50-100mg and no higher
- Above this, taken long term, B6 can cause nerve damage. Add up every product you take, including your multivitamin.
- Magnesium in a well-absorbed form
- Glycinate for evening use; oxide is poorly absorbed and mostly a laxative.
- Something you can take through the luteal phase only
- Several of these can be taken cyclically rather than daily, which lowers cost and total exposure.
What to ignore.
- Anything marketed as a PMDD cure
- There is no over-the-counter cure. A product making that claim is one you should not trust on anything else either.
- High-dose B6 'mood' formulas
- More B6 is not better and carries a real neuropathy risk.
The ingredients, one by one.
Magnesium glycinate
Genuinely useful if you are low in magnesium or sleeping badly. Not a sedative, and not a cure for anxiety.
Vitamin B6
A reasonable, cheap thing to try for PMS at 50-100mg. Never go above the labelled limit.
Omega-3
Worth taking if you rarely eat oily fish, and genuinely important in pregnancy. Not a mood treatment on its own.
Evening primrose oil
Reasonable to try for cyclical breast tenderness. Unlikely to do anything for hot flushes.
When a supplement is not the answer
If your premenstrual weeks involve rage, despair, or thoughts of harming yourself, that is PMDD territory and it deserves treatment, not a capsule. Cycle tracking over two to three months plus a proper assessment is the route in. SSRIs used continuously or in the luteal phase, some hormonal approaches and structured psychological support all have real evidence behind them. If you are in crisis now, contact 999, Samaritans on 116 123, or your GP urgently.
Read our PMDD guideCommon questions.
What supplements help PMDD?
Calcium has the most PMS trial support, with smaller studies behind magnesium, vitamin B6 at 50-100mg and omega-3. None of these treat PMDD itself.
Can supplements replace SSRIs for PMDD?
No. SSRIs have far stronger evidence in PMDD, including when taken only in the luteal phase. Supplements are support alongside treatment.
Should I take supplements all month or only before my period?
Several, including B6 and magnesium, can be taken through the luteal phase only. Calcium is usually taken daily. Discuss the pattern with a clinician if you are tracking symptoms.
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Food supplements are not medicines and are not intended to diagnose, treat or cure any condition. They should not replace a varied diet or prescribed treatment. If you are pregnant, breastfeeding, taking medication or managing a diagnosed condition, check with a pharmacist or clinician before starting anything on this page. We do not accept payment for inclusion or placement. Where a link earns us a commission we say so on the product page. Last reviewed 27 August 2026.