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Can I take Magnesium and Vitamin B complex together?

Guide för läkemedelsinteraktioner

There is no known harmful interaction between magnesium and Vitamin B complex. In fact, these two supplements are often taken together because they work well as a team in the body.

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Varför detta händer

Magnesium and B vitamins (especially Vitamin B6) have a synergistic relationship. Vitamin B6 helps the body absorb magnesium more efficiently into the cells where it is needed. They do not compete for absorption or interfere with how the other is processed by the liver or kidneys.

It is safe to take these together. For the best absorption, you can take them with a meal. Always stick to the recommended daily dose on the packaging, as taking very high doses of magnesium can sometimes cause diarrhoea or stomach upset.

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Kidney disease

If you have severe kidney problems, your body may not be able to remove excess magnesium, leading to dangerously high levels in the blood. Check with your doctor before use.

Long-term high-dose use

Taking high doses of Vitamin B6 (usually over 10mg to 50mg daily depending on the product) for a long time can cause peripheral neuropathy, which is tingling, numbness, or pain in the hands and feet.

Alkohol

It is best to avoid or strictly limit alcohol when taking Vitamin B complex. Alcohol interferes with the absorption of B vitamins (especially B1 and B12) and increases their excretion from the body, making the supplement less effective. Additionally, chronic alcohol use can lead to severe B vitamin deficiencies.

It is best to avoid or strictly limit alcohol when taking magnesium. Alcohol acts as a diuretic, which can increase the amount of magnesium your body loses through urine, potentially making the supplement less effective. Additionally, chronic alcohol use can lead to magnesium deficiency.

Dairy products (Milk, Cheese, Yoghurt)

Avoid taking magnesium supplements at the same time as large amounts of dairy products. Dairy is high in calcium, and high doses of calcium can compete with magnesium for absorption in the gut, meaning you may not get the full benefit of your supplement. It is best to space them at least 2 hours apart.

Caffeine (Coffee, Tea, Energy drinks)

It is best to limit caffeine intake around the time you take magnesium. Like alcohol, caffeine has a mild diuretic effect and can increase the excretion of magnesium through the kidneys.

Caffeine can act as a mild diuretic and may interfere with the absorption of certain B vitamins if consumed in large quantities at the same time as your supplement. Consider taking your B complex with water rather than a large cup of coffee.

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Taking multiple medicines? Our Interaktionskontroll för läkemedel helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.

Ansvarsfriskrivning

Denna information är endast avsedd för allmän utbildning och bör inte användas som en ersättning för professionell medicinsk rådgivning. Rådfråga alltid din läkare, apotekare eller annan kvalificerad vårdpersonal innan du fattar beslut om dina mediciner. Individuella omständigheter kan variera, och endast en vårdpersonal som känner till din medicinska historia kan ge personlig vägledning.

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Artikelhistorik

Informationen på denna sida är skriven och granskad av kvalificerade kliniker.

  • 25 jan 2026 | Ursprungligen publicerad
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