What are the benefits of taking magnesium alongside vitamin D3? A 2026 review in *Frontiers in Nutrition* highlights the relationship between these two nutrients. Nutribiolite’s Mag-fusion combines them with vitamins B6, B12 and folate to supplement the diet and contribute to the maintenance of bones and the normal functioning of muscles.
The publication is a narrative review on nutrients in polycystic ovary syndrome, incorporating clinical studies in women of childbearing age and research into biological mechanisms. It identifies an association between the syndrome and lower levels of vitamin D, and explains that magnesium plays a role in its activation. These observations relate to a specific clinical context. The review did not evaluate Mag-fusion nor does it demonstrate any additional benefit of this combination in healthy individuals.
Magnesium and D3: a combination for bones and muscles
Vitamin D needs to be converted within the body to perform its functions. Magnesium acts as a cofactor; in other words, it helps the enzymes involved in this process to function. This relationship explains why, when assessing vitamin D intake, it is also important to take magnesium into account.
Both nutrients contribute to the maintenance of normal bones and the normal functioning of muscles. Furthermore, vitamin D contributes to the normal absorption and utilisation of calcium and phosphorus. These complementary functions justify combining them in a single formula.
Each daily dose of Mag-fusion provides 247 mg of elemental magnesium, approximately 66 per cent of the reference intake for adults, and 50 µg of vitamin D3, equivalent to 2000 IU. These amounts correspond to the two capsules taken daily.
The product uses pure magnesium citrate as the source of the mineral. Vitamin D is presented as cholecalciferol, the name for the D3 form. This allows you to identify both the amount of each nutrient and its form in the composition.
Mag-fusion combines muscle support and energy in a single regimen
Magnesium contributes to normal energy metabolism – the processes by which the body obtains and uses energy. It also helps reduce tiredness and fatigue. Mag-fusion combines this support with bone and muscle care, without the need to take separate products to provide magnesium and vitamin D.
The review also describes how folate and vitamin B12 work together in the metabolism of homocysteine, a substance produced during the conversion of amino acids. Vitamin B12 is involved in a reaction that uses folate to convert homocysteine into methionine, another amino acid. This relationship explains the value of considering both nutrients together.
In Mag-fusion, folate is supplied as L-5-methyltetrahydrofolate and vitamin B12 as methylcobalamin. The formula also includes vitamin B6 as pyridoxal-5′-phosphate, a form that acts as a coenzyme, i.e. working alongside enzymes in the body’s metabolic reactions.
The recommended dosage is one capsule twice a day, after meals and with water. You can link each dose to a regular meal to help you stick to the routine. The pack contains 120 vegetable capsules, enough for 60 days when taken as directed.
Do not exceed the recommended dose and use the supplement as part of a varied and balanced diet. If you are already taking other magnesium or vitamin D supplements, check your total intake with a healthcare professional.
To supplement your intake of magnesium and vitamin D, Mag-fusion provides both nutrients, adds related B vitamins and combines a two-month supply in a single pack. See below for the formula and packaging details.
Mag-fusion combines magnesium and vitamin D3 to help maintain healthy bones and support normal muscle function. Its 120 vegetarian capsules provide a 60-day supply when taken as directed.
Frequently Asked Questions
What are the benefits of combining magnesium and vitamin D3?
Both help maintain healthy bones and support normal muscle function. Furthermore, magnesium plays a role in the processes involved in the activation of vitamin D.
How much magnesium and vitamin D3 does the daily dose provide?
The two capsules provide 247 mg of elemental magnesium from pure magnesium citrate and 2,000 IU of vitamin D3, equivalent to 50 µg.
What forms of B vitamins does Mag-fusion contain?
It contains B6 as pyridoxal-5′-phosphate, B12 as methylcobalamin and folate (B9) as calcium L-5-methyltetrahydrofolate.
How should Mag-fusion be taken?
Take one capsule twice a day, after meals and with water. The recommended daily dose is two capsules.
How long does a pack last?
Each pack contains 120 vegetarian capsules. At two capsules a day, this provides a 60-day supply, approximately two months.
This information is for guidance only and is not a substitute for advice from a healthcare professional.
