HGH is only legal with a perscription from a doctor. There are plenty of Anti-Aging clinics around that you can go to if your over 30 yrs old. Just look online you'll find them.
If your looking for a good legal growth hormone precursor, try pGHt by Human eVo Labs. pGHt™ is a blend of amino acid growth hormone peptide bonds; 4-amino butyric acid (GABA), 7-amino-8-hydroxbutyric acid (GABOB), Acetyl Glutamine. Studies have proven that Gamma Amino Butyric Acid alone dramatically increases growth hormone production in the pituitary gland and higher levels of growth hormone over a prolonged period like 6-12 months will produce a significant increase in lean muscle mass and decrease body fat. pGHt now has Lysine, Arginine and Ornithine which also raise GH levels and boost protein synthesis which is the bodies natural ability to turn protein consumed into lean tissue.