A combination supplement puts several nutrients on one label. To compare it fairly with individual products, start with each ingredient and its amount rather than treating the bottle as a single “strength”. Pay particular attention to the difference between one tablet and a daily serving.
Where calcium and vitamin D fit
Calcium helps maintain bones and teeth and is involved in muscle contraction. Dietary sources include dairy foods, calcium-fortified soya drinks and fish with edible bones. A varied diet is the starting point for calcium intake. Read the NHS calcium guide.
Vitamin D helps regulate calcium and phosphate. NHS guidance advises adults to consider a daily supplement containing 10 micrograms of vitamin D during autumn and winter; some people need advice about year-round supplementation. This general guidance is not an instruction to choose a particular combination tablet. See NHS vitamin D advice.
Read the supplied product table
The Greenlife label supplied for this catalogue lists the following amounts per tablet:
| Nutrient | Per tablet |
|---|---|
| Vitamin D3 | 5 μg |
| Calcium | 200 mg |
| Magnesium | 93.75 mg |
| Zinc | 10 mg |
| Boron | 1 mg |
The table mixes micrograms and milligrams. Keep those units attached to the numbers when making comparisons. Use the current pack for directions; this table describes the supplied label and does not prescribe a daily serving.
Check your whole supplement routine
Before adding a combination product, put your existing labels side by side. Record whether a multivitamin, separate vitamin D product or other mineral supplement contains any of the same ingredients. This gives a pharmacist a practical starting point for checking duplication and suitability.
The number of nutrients on the front is not a quality score. Ask which ingredients you actually need, whether the amounts fit your circumstances and whether a simpler product would answer the same question. Do not assume that more tablets are better because the label lists several nutrients.
Keep the label accessible
Retain the bottle, batch reference and full ingredient list. If you need advice, take the product information table along with your medicine list. This is especially useful when a professional has already recommended a particular nutrient, because a combination supplement also supplies its other ingredients.
General information, not individual medical advice. Product details reflect supplied catalogue material; check the current pack and ask a pharmacist about suitability.
Sources and further reading
Sources checked 3 November 2026. Product formulations can change; check the pack supplied with your order. These sources do not endorse this shop or its products.