The problem with peptides is that their effects are very subtle. When you drink your first cup of coffee in the morning the effect is quite dramatic and takes place within minutes. Peptides cause the growth of various glands, which then produce more hormones, which then cause an increase in other body functions. The effect takes place over weeks and then you notice it when you look back that some of your ageing problems have disappeared or reduced. After about 5 months without peptides, I am currently taking another 20-cap regiment of A-2 (thyroid), A-5 (brain), A-6 (thymus), and A-17 (adrenal) to boost my energy and mental functions. After one week I have noticed improvements but I expect the full effect will take another week or so when I complete the 20-cap dosages of peptides. My sister and I have been taking the Qi peptides for nearly two years now and rely on them for their anti-aging effects.