However, we now know that too high an intake of certain of the "B's" can present problems. For example, vitamin B6 can cause nerve toxicity although it usually doesn't cause problems in doses lower than 300 mg per day.

High doses of niacin (vitamin B3) can also cause problems, but you're not likely to run into trouble unless you're taking a total of 2000 to 3000 mg per day to lower cholesterol.

However, if you're taking two of the B-50 Complex (the "stress reducer" you mention in your question), the levels of B vitamins you'll be getting won't be high enough to cause you trouble, even when combined, as recommended, with a multivitamin and the antioxidant formula. You'll be getting only an additional 100 mg of B6 and 100 mg of B3.

Bulk skrev:Findes der bivirkninger ved at indtage multivitaminer? Grunden til jeg spørger er at flere B-vitaminer på min multivitammn indeholder 2000%-4000% af anbefalede dosis, men da det jo bare er mikronæringsstoffer burde der ikke være noget at være bange for?