Do women need multivitamins? What's worth taking

Multivitamins promise better energy, stronger immunity, and improved wellbeing. But do women actually need them, or are they just an expensive placebo?

The answer isn't as straightforward as yes or no.

While many women can meet their nutritional needs through a balanced diet, others may benefit from additional support at different stages of life. Factors such as age, hormones, pregnancy, stress, medical conditions and dietary choices can all affect how much of certain nutrients like vitamin D, iron, iodine, magnesium and B12 your body needs, and how well it absorbs them.

Here's your guide to multivitamins, the nutrients women commonly need more of and how our nutrition needs shift over time.

Do all women need a multivitamin?

No. There isn't a single recommendation that suits every woman.

“Ideally, most of our nutrient needs should come from a varied, whole-food diet, For some women, a well-balanced diet may provide everything they need.”

For many people, eating a wide variety of nutritious foods provides the vitamins and minerals needed to stay healthy. Fruit, vegetables, wholegrains, lean proteins, dairy (or alternatives), nuts and seeds all contribute important nutrients that supplements simply can't replace.

However, your body may require more of certain nutrients, or absorb them less efficiently, because of:

• Ageing
• Digestive conditions
• Genetics
• Heavy periods (menstruation)
• Hormonal changes
• Medications
• Pregnancy and breast feeding
• Stress

This is why nutrition is highly individualised and why there is no universal answer for whether women should take multivitamins. The extra steps you need to take to stay healthy may not be necessary for someone else.

How to know if your diet is covering your nutritional needs

It can be difficult to know whether you meet your nutritional requirements based on a diet alone. Even if your meals look “healthy”, invisible things like digestion, absorption, and your body's changing needs can influence your nutrient levels.

Rather than focusing on individual foods, healthcare professionals look at the bigger picture. They consider your eating habits, lifestyle, medical history, current symptoms and pathology tests to identify any nutrient deficiencies.

Signs that indicate it's time to seek professional advice include:

• Brain fog or poor concentration
• Increased hair loss or hair shedding
• Frequent headaches
• Frequently skipping meals or long stretches of restrictive diets.
• Ongoing fatigue and tiredness despite getting enough sleep
• Reduced exercise performance or breathlessness

These symptoms don’t automatically confirm vitamin deficiency. There are several common vitamin deficiencies including iron and B12 that can only be confirmed with a blood test.

It’s important to speak with a GP, naturopath or nutritionist first, instead of guessing which supplements to take.

Are women's multivitamins good for you?

Multivitamins can be useful when they fill a genuine nutritional gap that your diet cannot fulfil. But it isn’t designed to replace a consistently poor diet, and it won't outperform whole foods.

Whole foods contain fibre, healthy fats, phytonutrients, and compounds that work together to support overall health.

A multivitamin can be worthwhile if you have a restricted diet or low appetite, eat plant-based, menstruate heavily, are over 50, or have a condition affecting absorption. If you eat a varied diet, have no relevant health history and feel well, it may be doing very little for you.

Is taking a multivitamin every day good for you?

For most healthy women, taking a standard-dose multivitamin daily is generally considered safe. However, supplements aren’t a case of “more is better”. Some nutrients, particularly iron and fat-soluble vitamins A, D, E, and K can build up in the body and cause problems at high intakes.

Stacking a multivitamin on top of individual supplements and fortified foods is where people most often get into trouble. There's also a practical detail worth knowing.

“Some of these minerals compete for absorption. So it's important to be smart in how you take your multivitamin.”

For example, iron, zinc and calcium all use overlapping absorption pathways, which is why timing and combinations matter more than most labels let on.

Who may benefit most from multivitamins?

• Women with restricted diets or low appetite: Busy lifestyles, illness, food intolerances or restrictive diets can make it difficult to consistently meet your nutritional needs.
• Plant-based diets: A well-planned vegetarian or vegan diet can be incredibly nutritious and support excellent health. But nutrients including B12, iron, zinc, iodine, vitamin D and omega-3 fats deserve extra attention.
• Women who menstruate: Regular blood loss increases iron requirements. Women with heavy periods may be at greater risk of low iron, which can contribute to fatigue, poor concentration, reduced exercise capacity, headaches, and hair loss.
• Women who are pregnant, postpartum or breastfeeding: Pregnancy, postpartum, and breastfeeding place greater nutritional demands on the body. Nutrients such as folate, iodine, iron and Omega3 fatty acids become more important to support mother’s and baby’s health.
• Women over 50: As individuals age, nutritional priorities shift naturally. Maintaining bone strength, cardiovascular health, and muscle function has become increasingly important. Nutrients such as calcium, vitamin D, magnesium, and vitamin B12 often become higher priorities.
• Women with digestive or absorption concerns: Coeliac disease, inflammatory bowel disease, other digestive disorders, previous gastric surgery and long-term medication use can all affect how well nutrients are absorbed.

In each of these situations, personalised advice is far more valuable than relying on a generic supplement. A healthcare professional can recommend the nutrients, dosage and forms that best suit your needs.

What vitamins should you take daily as a woman?

There isn't a single list of vitamins that every woman should take each day. Your nutritional priorities will change depending on your health, diet, and life stage. However, some nutrients are more frequently important because they support a wide range of essential body functions.

• Vitamin D does more than support bone health. It also supports immune function, muscle strength, and overall wellbeing.
• Vitamin B12 supports healthy nervous system health, red blood cells formation, brain function, and energy production.
• Folate is especially important before and during pregnancy. It plays a vital role in DNA synthesis, cell division, and healthy fetal development.
• Iron transports oxygen around the body and supports energy production, cognitive function, and physical performance.
• Calcium keeps your bones, teeth, muscles, and nerve function healthy.
• Magnesium is used for energy production, muscle function, nervous system regulation, stress resilience, and sleep.
• Iodine is critical for thyroid function and during pregnancy
• Zinc supports immunity, skin and wound healing, and is important to be aware of if you follow a plant-based diets
• Selenium supports thyroid and antioxidant function.
• Vitamin K works alongside vitamin D and calcium in bone health and is vital to healthy heart function.

Do vitamin needs change by age and life stage?

Absolutely. Nutritional needs evolve throughout life as hormones, metabolism, reproductive demands and health priorities change.

• Teens and young adults: Periods begin; bones continue developing, and rapid growth increases the need for iron, calcium, and vitamin D.
• Menstruating adults: Iron remains particularly important because of menstruation, while B vitamins continue to support healthy energy metabolism.
• Planning a pregnancy: Folate should ideally be taken before conception, alongside iodine, to support healthy fetal development.
• Pregnancy, postpartum and breastfeeding: The body works harder to support both mother and baby, increasing requirements for iron, folate, iodine, vitamin D and omega 3 fatty acids.
• Perimenopause and menopause: Vitamin D, calcium, and magnesium help protect long-term bone and nervous system health as oestrogen declines.
• Over 50: Vitamin D, calcium, magnesium and vitamin B12 become increasingly important, while iron requirements generally reduce after menopause.

“Women's bodies are so dynamic and amazing. They respond to the life stages and challenges that are thrown at them, and each of those stages requires the right nutrients, minerals, and nourishment to adapt and heal.”

That's what makes personalised nutrition so valuable. The goal isn't simply to avoid deficiency, it's to help individuals feel their best, support long-term wellbeing, and thrive at every stage of life.

This article is intended as general information only and shouldn't replace personalised advice from your GP, an accredited practising dietitian, or a qualified nutritionist.