This is high quality food grade Biotin. There are no fillers or additives. Also known as Vitamin B7, Biotin is necessary for cell growth and metabolism of fats and amino acids. Biotin is not considered hazardous, but any internal use should be monitored by a physician to ensure adequate blood plasma levels are achieved. No toxicity levels have been reported, even in cases of prolonged use at high dosages. Smaller doses can be eliminated from the body rather quickly (1.5 hours) so a plan needs to be established prior to use.