Do not exceed the recommended daily intake unless advised by a suitably qualified person. Food supplements should not be used as a substitute for a varied, balanced diet and healthy lifestyle. High dose biotin can interfere with some laboratory blood tests, including thyroid and heart tests, so tell your doctor or the laboratory that you take biotin before any blood test. Keep out of the reach of children. Speak to our pharmacist before use if you have a medical condition, are pregnant, breastfeeding, taking medication or under medical supervision.