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Intranasal administration is valued as a non-invasive means of both systemic and local administration with good bioavailability, rapid onset, and targeted effects on the central nervous system [13, 14]

This leads into the second problem, which is that it is very hard to be sure of the ingredients of these products

[11] [13] There are limited known drug-drug interactions with HCG

Many non-medical people (and apparently some medical people as well) seem to think peptides are some exciting new discovery in the world of medicine

Quality Uniform process control practices produce consistent end products and improve process availability and adaptability

Pharmaceuticals, 18 (6), 928