Supplements and weight loss, what a pill can add and what it will never do for you

What a supplement is in the UK

In the UK, vitamins, minerals and most other food supplements are sold as food, not as medicines. That means they do not go through the testing a medicine does before reaching the shelf. The government guidance on food supplements for consumers explains what they are and how they are controlled. Health claims on the label must come from an approved list. You will notice that none of those approved claims says a vitamin or mineral makes you lose weight. That alone tells you a lot.

Where a supplement makes sense

There are a few cases where the NHS does recommend a supplement, and they are about filling gaps, not burning fat.

• Vitamin D in autumn and winter. The NHS page on vitamin D advises adults in the UK to consider 10 micrograms a day from October to March, when there is not enough sunlight to make it in the skin.
• Folic acid before and in early pregnancy. This is standard advice, and your GP or midwife will guide you.
• Vitamin B12 on a vegan diet. It is found naturally in animal foods, so vegans usually need fortified foods or a supplement.
• A gap your GP has found. For example, low iron confirmed by a blood test.

Outside these cases, most people get what they need from a varied diet. Our guide to common vitamin myths and our article on the quieter minerals show where to find them on your plate.

What a supplement will not do

• It will not burn fat. Pills sold as fat burners have no approved claim to do so, and some sold online contain undeclared ingredients.
• It will not cancel a big meal. No capsule removes the energy from food you have already eaten.
• It will not replace vegetables. Whole foods bring fibre, water and hundreds of compounds a tablet does not.
• It will not fix tiredness caused by short nights. Only better sleep does that.

Spending money on a supplement can also give a false sense of having done something, which makes it easier to skip the harder changes. The same money spent on fruit, vegetables, eggs or a bag of oats usually does more for your weight and your energy.

4 questions before you buy anything

• What gap is this filling? If you cannot name a specific gap, you probably do not need it.
• Does the label promise weight loss? If so, be wary. That is not an approved claim for vitamins or minerals.
• Could it interact with my medicines? Some herbal products do. Ask your pharmacist.
• Is the dose sensible? More is not better. High doses of some vitamins can cause harm over time.

Food first, in practice

A food first approach is simple. Build each meal around a source of protein, vegetables or fruit, and a wholegrain. Eggs on wholemeal toast with tomatoes. Lentil soup with a slice of granary bread. Salmon, potatoes and green beans. None of these needs anything added from a jar of tablets. Oily fish twice a week covers some vitamin D, though rarely enough in winter. Fresh produce from the Friday market on Market Square is an easy way to keep colour on the plate through the week. For the protein side, our article on how much protein you need gives practical amounts.

Talk it through first

If you are unsure what your diet lacks, talking it through costs nothing. Bicester Nutrition is on the first floor at 106 Churchill Road, and the first assessment is free. Coaches trained in nutrition look at your breakfast, your week and your habits, then follow you daily over breakfast at the club. A free assessment is a good place to ask your questions.

This article does not replace advice from your GP or pharmacist. Always speak to a health professional before taking a supplement if you are pregnant, take medication or have a health condition.