Magnesium Guide
Ingredient guide
Magnesium, without the guesswork.
Compare forms, serving sizes, tolerance, and label cautions before choosing a magnesium supplement.
Quick Answer
If you are choosing a magnesium supplement, start with three questions: what form is used, how much elemental magnesium is supplied per serving, and does the product fit your routine without duplicating another supplement?
For Root & Pulse, the most relevant product is Magnesium Bisglycinate + Vitamin B6, which supplies 300mg magnesium per two-capsule serving.
Why Magnesium Matters
Magnesium has authorised nutrition and health claims in Great Britain when a product meets the relevant conditions of use. These claims include contribution to normal muscle function, normal functioning of the nervous system, normal psychological function, normal energy-yielding metabolism, electrolyte balance, and the reduction of tiredness and fatigue.
That does not mean every magnesium supplement is right for every person. The useful work is comparing the form, dose, label cautions, and how it fits with diet, medicines, and other supplements.
Magnesium Forms Compared
The form matters because different magnesium compounds can vary in solubility, elemental magnesium content, and tolerance. Labels may list both the compound and the elemental magnesium amount; the elemental amount is the number to compare across products.
| Form | How to think about it | Good label question |
|---|---|---|
| Bisglycinate / glycinate | Often chosen for straightforward daily routines and for people comparing gentler-feeling options. | How much elemental magnesium is supplied per serving? |
| Citrate | A common, soluble form. Some people find it less suitable if they are sensitive to digestive effects. | Is the serving size suitable for your tolerance? |
| Oxide | Can provide a high amount of elemental magnesium, but is commonly discussed as less soluble than several other forms. | Is the product relying on a large headline number? |
| Malate | Another form customers may compare for general daily use. | What else is included in the formula? |
| Taurate | A more specialist form that may appear in targeted formulas. | Is there a clear reason to choose this over a simpler form? |
How To Choose
1. Start with the elemental magnesium amount
Do not compare products by compound weight alone. For example, a label might mention magnesium bisglycinate as the compound, but the useful comparison point is the elemental magnesium supplied per serving.
2. Check the full routine
Magnesium can also appear in multivitamins, bone formulas, electrolyte products, and women's wellness products. Add up the routine rather than treating each product separately.
3. Match the serving to your day
A supplement is only useful if it is easy to repeat. Check whether the serving is one capsule, two capsules, tablets, powder, or multiple daily servings.
4. Read the cautions
If you are pregnant, breastfeeding, taking medication, have kidney disease, or are managing a health condition, ask a qualified professional before using a magnesium supplement.
Safety And Tolerance
Magnesium from food is generally handled differently from high-dose supplemental magnesium. Supplemental magnesium can cause digestive effects such as diarrhoea, nausea, and abdominal cramping in some people, especially at higher intakes.
Keep magnesium supplements away from children, follow the product label, and avoid stacking multiple magnesium-containing supplements without checking the total amount.
Common Questions
Which magnesium form should I choose?
There is no single best form for everyone. Compare the magnesium form, elemental magnesium per serving, digestive tolerance, suitability, and whether the product overlaps with anything else in your routine.
Is magnesium bisglycinate the same as glycinate?
These names are often used closely together in supplement labelling. Always check the full supplement facts panel because the important number is the elemental magnesium supplied per serving.
Can magnesium supplements cause digestive discomfort?
Some people experience digestive effects from supplemental magnesium, especially at higher intakes or with certain forms. Start by reading the label and speak with a qualified professional if you are unsure.
Should I take magnesium if I use medication?
Check with a doctor, pharmacist, or qualified practitioner before using magnesium if you take medication, are pregnant or breastfeeding, have kidney disease, or manage a health condition.
References
- Great Britain nutrition and health claims register, Department of Health and Social Care, updated 19 May 2026.
- Classifying vitamins, supplements and herbal medicines for import and export, GOV.UK nutrient reference value table.
- Magnesium fact sheet for health professionals, NIH Office of Dietary Supplements.
- Food: Health claims, ASA/CAP advice on authorised claims and avoiding exaggeration.
Root & Pulse educational content is for general information only and is not medical advice. Always read product labels and speak with a qualified professional if you are pregnant, breastfeeding, taking medication, or managing a health condition.