Scientists have shown that early growth hormone supplementation in rats with growth hormone deficiency can prevent defects in memory developing later in adulthood. The study, published in the Journal of Endocrinology is the first to show that memory defects in adults as a result of growth hormone deficiency arising in childhood can be prevented by growth hormone treatment during adolescence. Growth hormone levels start off low in early life, and peak just before puberty, after which they gradually decline with increasing age... 
More...
More...