Given the importance of purine-containing molecules for survival, vertebrates, including humans, have developed robust systems for synthesizing sufficient purine nucleosides for their metabolism using readily available materials (such as glucose, glycine, and glutamine), as well as recycling purine nucleosides from throughout the body or from the diet
Reducing the intensity or volume of training can help normalize periods in such cases
Those claims assume ideal conditions most researchers don't maintain: pharmaceutical-grade amber vials, inert gas blanketing, zero temperature fluctuations, and immediate refrigeration post-mixing
A sloppy technique will negate the benefits of a precision syringe
Some researchers note that DSIP does not appear to induce tolerance with repeated use, while others recommend cycling as a precautionary measure