Growth hormone is aptly named as it is responsible for development throughout childhood. Also known as somatropin or HGH, this hormone slows down with age, though it continues to contribute to the management of metabolism and healthy blood glucose levels in adults. Definitive research is lacking on the role HGH plays in skin health, but it is theorized that it helps to keep skin looking supple and young due to its role in stimulating collagen production and promoting cell turnover and growth.