The recommended intake is one capsule per day. This dosage should not be exceeded and high dose Vitamin B is not recommended during pregnancy. Use of a supplement is not a substitute for a varied, balanced diet. If you are on medication, pregnant, breast-feeding or being treated for a medical condition, you should consult your doctor first before taking Rep-Hair™ Hair and Nail Supplements. There are unlikely to be any side-effects from taking these tablets. However, if you do experience any worrying symptoms, stop taking the product and consult a doctor.