Food supplements: how to choose the right formula for your needs?

Buying food supplements online can quickly become confusing: multivitamins, magnesium, zinc, vitamin B12, probiotics, marine collagen, guarana or maca… Labels promise more energy, immune support and general wellbeing, but not every formula is designed for the same purpose.

Before you fill your basket, keep these three pitfalls in mind.

• Confusing quantity with suitability: a higher dose isn’t necessarily a better fit. Some products contain several thousand per cent of the nutrient reference value, particularly for vitamin B12 or zinc.
• Looking only at the number of tablets: a bottle of 400 capsules or tablets may last for several months or even longer. But the daily dose, number of active ingredients and usage instructions matter just as much.
• Taking claims at face value without checking the ingredients: whether it’s designed for men, vegans or long-term use, a formula should be assessed by looking at its ingredients, allergens, dosage and format.

What to check before you buy

1. The amount per daily dose

Always compare the nutrients in the recommended daily dose, not just per tablet. Some products require two or even four capsules a day. This directly affects how long the supplement will last and its daily cost.

For a magnesium complex, check the amount of elemental magnesium: this may differ from the total weight of the compound. For example, WeightWorld Magnesium Glycinate provides 200 mg of elemental magnesium per two capsules, while Magnesium Complex provides 250 mg per two-capsule dose.

The same care is needed with zinc, iron and vitamins. Don’t choose a product simply because it has the highest figure on the label.

2. The form and composition of the active ingredients

The form used can affect digestive tolerance, how you take the product and any precautions you need to follow. Common examples include:

• magnesium bisglycinate, used in some magnesium capsules;
• methylcobalamin, a form of vitamin B12 found in one vegan product;
• zinc bisglycinate and zinc citrate;
• concentrated guarana, maca or ginseng extracts;
• probiotics combined with prebiotic fibres such as inulin and FOS.

A vegan formula won’t automatically suit everyone. Check for allergens too, including fish, soya or any other ingredients you need to avoid.

3. The format, duration and precautions

Capsules and tablets are easy to fit into your routine, while gummies can be a convenient option if you find tablets difficult to swallow. However, they usually contain sugar or glucose syrup, so it’s best to read the label carefully.

For long-term use, check the following:

• the daily dose and how many times a day to take it;
• storage instructions, particularly for probiotics;
• warnings relating to pregnancy, breastfeeding or certain health conditions;
• possible interactions with medicines;
• declared allergens.

Guarana naturally contains caffeine, so avoid combining it with lots of other caffeinated drinks or taking it late in the day. If you’re taking high-dose iron or zinc, it may be worth seeking medical advice, particularly if you plan to take it for a long time or have a known health condition.

Our picks for different needs

Recommended for: Beginners on a budget

WeightWorld Multivitamins with Minerals 400 Tablets

Why it suits this profile: One tablet a day and a pack of 400 make it easy to plan a long course without needing to buy another bottle soon.

How this product helps you avoid the pitfall

The detailed ingredient list lets you check that it contains the 27 advertised vitamins and minerals, and see the amount per tablet, rather than relying on the pack size alone.

Key benefit and highlights

Vegan formula, declared gluten-free, peppermint-flavoured tablets and a recommended dose of one tablet a day.

Recommended for: Those looking for a premium option

WeightWorld Marine Collagen Advance 120 Capsules

Why it suits this profile: This formula combines marine collagen, vitamin C, zinc, hyaluronic acid and coenzyme Q10 for anyone looking for a product packed with active ingredients.

How this product helps you avoid the pitfall

The dose is listed for four capsules, not the whole bottle, making it easier to work out how long the course will last.

Key benefit and highlights

1,170 mg of hydrolysed marine collagen per dose, 80 mg of vitamin C and 10 mg of zinc. Contains fish.

Recommended for: Specific needs and regular users

WeightWorld Bio Cultures Complex 60 Billion 120 Capsules

Why it suits this profile: This complex is for anyone looking for several probiotic strains and a clearly structured routine.

How this product helps you avoid the pitfall

The number of strains, the stated CFU count and the presence of inulin and FOS are all specified. Once opened, the product should be stored in the fridge.

Key benefit and highlights

20 strains and 60 billion CFU per two-capsule dose, with delayed-release plant-based capsules.

Frequently asked questions about food supplements

How long does a course of food supplements last?

It depends on the product and the daily dose. A bottle of 400 tablets taken at one a day could last for more than a year, while a formula requiring four capsules a day will run out much sooner. Always check the label, and avoid taking high doses for an extended period without medical advice.

Can you take several food supplements together?

In some cases, yes, but watch out for overlapping ingredients. A multivitamin may already contain zinc, magnesium, vitamin B12 or a B vitamin complex. Combining several products could mean you exceed the recommended intake. Compare the ingredients and ask a healthcare professional for advice if you’re taking medication or need to take particular precautions.

Can food supplements replace a balanced diet?

No. They’re there to supplement your diet, not to replace a varied diet, good hydration and a balanced lifestyle. Nutrition and health claims authorised in Europe describe the role of certain nutrients; they don’t guarantee an individual result.