The bacteria that live naturally in your bowel are able to make biotin, so it's not clear if you need any additional biotin from the diet. Taking 200mg or less a day of pantothenic acid in supplements is unlikely to cause any harm. Vitamin B6 The Department of Health and Social Care recommends that folic acid supplements are taken by all women who are pregnant or could get pregnant. Riboflavin cannot be stored in the body, so you need it in your diet every day. What happens if I take too much riboflavin? Taking 17mg or less of nicotinic acid supplements a day, or 500mg or less of nicotinamide supplements a day, is unlikely to cause any harm. Pantothenic acid

Vitamins and minerals - B vitamins and folic acid - NHS Vitamins and minerals - B vitamins and folic acid - NHS

But in a few cases when people have taken large amounts of vitamin B6, particularly for more than a few months, the effect can be permanent. Biotin is also found in a wide range of foods, but only at very low levels. What happens if I take too much biotin? There's not enough evidence to know what the effects might be of taking high daily doses of biotin supplements. What does the Department of Health and Social Care advise? Pantothenic acid is found in varying amounts in almost all vegetables, wholegrain foods and meats, but good sources include: If you're pregnant, trying for a baby, or could get pregnant, it's recommended that you take a 400 microgram folic acid supplement daily until you're 12 weeks pregnant.There's not enough evidence to know what the effects might be of taking high daily doses of pantothenic acid supplements. What does the Department of Health and Social Care advise? Taking high doses of nicotinic acid supplements can cause skin flushes. Taking high doses for a long time could lead to liver damage. Taking 0.9mg or less a day of biotin in supplements is unlikely to cause any harm. Folate and folic acid

Breakfast cereals are also a good source if they have been fortified with pantothenic acid. How much pantothenic acid do I need?The effect of taking vitamin B6 at doses between 10 and 200 mg is unclear. So there's not enough evidence to say how long these doses could be taken for safely. What does the Department of Health and Social Care advise? Taking 100mg or less a day of thiamin supplements is unlikely to cause any harm. Riboflavin (vitamin B2) Read about the vegan diet for nutrition information and advice. What happens if I take too much vitamin B12? Niacin cannot be stored in the body, so you need it in your diet every day. What happens if I take too much niacin? Adults need 200 micrograms of folate a day. A microgram is 1,000 times smaller than a milligram (mg). The word microgram is sometimes written with the Greek symbol μ followed by the letter g (μg).

There's not enough evidence to know what the effects might be of taking high doses of thiamin supplements each day. What does the Department of Health and Social Care advise?

If you're taking folic acid supplements, it's important not to take too much as this could be harmful. Get more advice about vitamins and minerals during pregnancy, including who should take a higher dose of folic acid. What happens if I take too much folic acid? Taking 200mg or more a day of vitamin B6 [LK2] can lead to a loss of feeling in the arms and legs known as peripheral neuropathy. You should be able to get all the pantothenic acid you need from your daily diet, as it's found in many foods.