Women's nutritional needs aren't the same as men's, yet most supplement advice is written with men in mind. Women need more than twice as much iron during their reproductive years, have specific folate needs around pregnancy, and face a faster decline in bone density after menopause.
This guide covers the supplements for women that are genuinely worth knowing about: the key nutrients, how much you need, which forms to look for, and the extra considerations if you train. It isn't medical advice. If you have symptoms, a medical condition or take medication, speak to your GP before starting anything new.
The key nutrients for women
Iron
Iron is one of the most important nutrients for women, and one of the most common shortfalls. The NHS recommends 14.8mg of iron a day for women aged 19 to 50, compared with 8.7mg for men, because of iron lost through periods. After menopause, the requirement drops to 8.7mg.
Iron contributes to the reduction of tiredness and fatigue, to normal formation of red blood cells and haemoglobin, and to normal cognitive function.
Good food sources include red meat, beans and lentils, dark green leafy vegetables, fortified cereals and dried fruit. Vitamin C increases iron absorption, so pair plant sources with fruit or vegetables. Tea and coffee reduce absorption, so avoid them with iron-rich meals.
If you have heavy periods, follow a plant-based diet, or train hard (especially endurance training), you're more likely to fall short. A liquid supplement such as Gene Blast Liquid Iron + B Complex combines iron with vitamin C and B vitamins.
Important: don't take high-dose iron unless you know you need it. Too much can cause stomach upset and, over time, can be harmful. If you think you might be low, ask your GP for a blood test. Keep iron supplements well out of reach of children.
Vitamin D
The NHS advises everyone in the UK to consider 10 micrograms (400IU) of vitamin D a day during autumn and winter. Some groups, including people who cover their skin or rarely go outdoors, are advised to take it all year round.
Vitamin D contributes to the maintenance of normal bones and muscle function and to the normal function of the immune system. It also contributes to normal absorption and use of calcium.
Higher-strength products such as Insight Vitamin D3 + K2 (5,000IU) are popular, but they're well above the NHS daily amount, so don't take them long term unless a healthcare professional has advised it. Check whether your multivitamin already contains vitamin D before adding a separate one.
Folate and folic acid
Folate contributes to the reduction of tiredness and fatigue and to normal blood formation. It's especially important before and during early pregnancy: the NHS advises anyone who could get pregnant to take 400 micrograms of folic acid a day before conception and until the 12th week of pregnancy. Supplemental folate intake increases maternal folate status, and folate contributes to maternal tissue growth during pregnancy.
A simple, low-cost option is Prowise Folic Acid 400mcg. If you're planning a pregnancy, speak to your GP or pharmacist, as some women are advised to take a higher dose.
Vitamin B6 and B12
Vitamin B6 contributes to the regulation of hormonal activity and to the reduction of tiredness and fatigue. Vitamin B12 contributes to normal red blood cell formation and normal energy-yielding metabolism. B12 is found almost entirely in animal foods, so if you follow a vegan diet, a B12 supplement or fortified foods are essential.
Calcium
Adults need about 700mg of calcium a day. Calcium is needed for the maintenance of normal bones and teeth. Most people get enough from dairy, fortified plant milks, tofu, green vegetables and bread. If you avoid dairy, check that your plant milk and yoghurt are calcium-fortified.
Omega-3
If you don't eat oily fish such as salmon, mackerel or sardines at least once or twice a week, an omega-3 supplement is worth considering. EPA and DHA contribute to the normal function of the heart, and DHA contributes to the maintenance of normal brain function and normal vision. Insight Omega High Strength gives you 500mg EPA and 250mg DHA in one softgel. Vegans can look for an algae-based omega-3.
Magnesium
Magnesium contributes to the reduction of tiredness and fatigue, to normal muscle function and to normal psychological function. Glycinate forms, such as Insight Magnesium Glycinate, are gentle on the stomach and easy to take in the evening.
Supplements for women who train
Protein
Women who lift weights or train regularly often under-eat protein. Protein contributes to the growth and maintenance of muscle mass, and a shake is an easy way to hit your target. If you're cutting or find whey heavy, try a whey isolate such as Per4m Isolate or a clear whey. Read How Much Protein Do You Actually Need? to work out your daily target.
Creatine
Creatine isn't just for men. It's one of the most researched supplements available, and creatine increases physical performance in successive bursts of short-term, high-intensity exercise, with a daily intake of 3g. Creatine monohydrate won't make you "bulky" on its own. For a full breakdown, read Creatine for Women: What It Does, What It Doesn't, and How to Take It.
Iron for active women
Training, especially running and other endurance sport, increases iron loss. If you train hard and feel unusually tired, ask your GP about checking your iron levels before supplementing.
Electrolytes
If you sweat heavily or train for long periods, electrolytes help replace what you lose. See Do You Need Electrolytes?
Hair, skin and nails
Beauty supplements are a popular category for women. The nutrients with authorised claims for skin, hair and nails are:
- Vitamin C contributes to normal collagen formation for the normal function of skin.
- Biotin contributes to the maintenance of normal skin and normal hair.
- Zinc contributes to the maintenance of normal skin, hair and nails.
- Selenium contributes to the maintenance of normal hair and nails.
Products such as Gumi Vitamins Rejuvenate Collagen (with vitamin C and biotin) and Musclesport Hair, Skin & Nails combine these nutrients in one product.
Women-specific formulas
A growing number of brands now make products formulated specifically for women, such as:
- Engineered Muscle ReSync AM: myo-inositol, D-chiro-inositol, NAC and folate, made for female bodybuilders
- Engineered Muscle ReSync PM: an evening formula with glycine, magnesium, zinc and KSM-66® ashwagandha
- Prowise Women's Flora: live cultures with plant extracts
- Prowise Myo-Inositol Complex: inositol with folic acid and B vitamins
Always read the warnings. Products containing ashwagandha aren't suitable during pregnancy or breastfeeding, and anyone with a thyroid condition should speak to their GP first.
What to look for in a women's supplement
- Fully disclosed labels: so you can see the exact dose of every ingredient.
- Doses that match UK guidance: bigger isn't always better, especially for iron, vitamin A, vitamin D and B6.
- No vitamin A (retinol) if you're pregnant or trying to conceive. High doses can harm an unborn baby.
- The right form: magnesium glycinate over oxide, methylfolate or folic acid, vitamin D3 over D2.
- No unnecessary extras: a long ingredient list with tiny doses is marketing, not nutrition.
A simple women's supplement routine
- Everyday health: vitamin D in autumn and winter, omega-3, and a multivitamin if your diet is limited.
- Heavy periods or plant-based diet: iron (after checking with your GP), and vitamin B12 if you're vegan.
- Planning a pregnancy: folic acid 400mcg daily and vitamin D, with no vitamin A supplements.
- Training regularly: protein, creatine, magnesium, and electrolytes for long sessions.
- Over 40: vitamin D, calcium from food, protein and creatine.
For a deeper look at how your needs change through your 20s, 30s, 40s and beyond, read our guide to women's supplements by life stage and The Best Supplements for Women Over 40.
FAQs
What is the best vitamin for women?
There isn't one best vitamin. For most UK women, vitamin D in autumn and winter and enough iron are the two most likely gaps. Folic acid is essential if you could become pregnant.
Should women take a multivitamin?
A multivitamin can be useful insurance if your diet is limited, but it can't replace a varied diet. Read What to Look for in a Multivitamin before you buy.
Can women take the same supplements as men?
Mostly, yes. Protein, creatine, omega-3 and magnesium work the same way. The differences are in iron (women of reproductive age need more), folate (around pregnancy) and some herbal ingredients that aren't suitable during pregnancy.
Is it safe to take supplements while pregnant?
Folic acid and vitamin D are recommended by the NHS. Many other supplements, including high-caffeine products, ashwagandha, 5-HTP and vitamin A, are not suitable. Always check with your midwife or GP.
Food supplements should not replace a varied diet and healthy lifestyle. If you are pregnant, breastfeeding, taking medication or have a medical condition, speak to your GP before use. This article is for general information and is not medical advice.