Vitamin B complex consists of a variety of B vitamins. Eight different vitamins compose vitamin B complex. You need B vitamins to aid growth, development and body function. Some of the eight vitamins work together as a group, while some work independently and have their own specific functions. Only take supplements of any kind under your doctor's supervision.
Function
B vitamins aid digestion; the growth of hair, skin and nails; red blood cell production, and chemical reactions within your body. Folic acid, one of the vitamins in vitamin B complex, is responsible for reducing the risk of birth defects, while a different B vitamin, biotin, is responsible for luxurious hair and long fingernails. Thiamine and riboflavin are responsible for producing energy and enzymes that affect your heart, nerves and muscles.
Supplements
If your diet regularly lacks B vitamins, or you have low B vitamin levels, your healthcare provider may advise you to start taking vitamin B complex to help raise your B vitamin levels. You may begin to show symptoms of low B vitamin levels if you have dry hair and skin, feel tired or have low energy levels, your mouth is cracked in the corners, have loss of vision, memory problems, inability to walk and hallucinations. Your doctor will advise you how much vitamin B complex to take based upon your levels.
Side Effects
It is possible to get too much vitamin B complex while you're taking supplements. Common side effects, according to Drugs.com, include nausea, drowsiness, headache and mild diarrhea. Serious side effects include a body rash or hives, which could indicate a possible allergic reaction to the supplement, tingling skin and numbness. Seek prompt medical attention if you begin to experience serious side effects.
Considerations
Never take any type of supplement without prior doctor approval. Include a variety of foods in your diet to ensure you're receiving all the vitamins your body needs. B vitamins are found in foods such as bananas, potatoes, liver, pork, peanuts, egg yolks, mushrooms, dairy products, nuts, whole grains and leafy green vegetables. Food sources are always the best source of vitamins. Supplements are only meant to ensure your recommended daily allowance of any particular vitamin or mineral are met should your diet not include enough of that nutrient or none at all.
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