HGH Supplements that naturally enhance the production of the hormone by the pituitary gland are vital to use as we age. As we pass through adolescence into adulthood, the plentiful level of Human Growth Hormone (HGH) that was so important to our development in our youth begins to decrease. HGH supplements contain amino acids, along with vitamins and minerals that enable them to stimulate the pituitary gland in the brain to increase and maintain the level of HGH in our systems. While these supplements are very effective, they do not contain HGH itself, as contrasted to homeopathic HGH replacement products, which do.