How are HGH levels measured?
HGH is only present in the body for a short period of time before the liver absorbs it and converts it into various growth factors, the most important of which is IGF-1, also known as Somatomedin-C. However, IGF-1 – which stands for Insulin-like Growth Factor 1 – is present in the body at all times and since it does most of the work for HGH it is easiest to measure IGF-1 levels. Blood and saliva tests can show your IGF-1 levels. Generally, the lower your levels, the more you stand to gain from HGH supplements.