If your gut isnt absorbing it properly, much of it simply doesnt make it into your bloodstream
Articles Source Seiwerth, S., Sikiric, P., Grabarevic, Z., Zoricic, I., Hanzevacki, M., Ljubanovic, D., & Kolega, Z
Theres a black market production, primarily in China, that sends large amounts of these peptides to the United States with the label For research only, says Pinchas Cohen, MD, dean and distinguished professor of gerontology, medicine, and biological sciences at the USC Leonard Davis School of Gerontology, who has discovered several investigational peptides
While not common everywhere, its an option for patients who dont do well with shots or have trouble absorbing vitamin B12
However, these same trials documented various side effects that occur during the initial dose-escalation phase, including gastrointestinal symptoms and fatigue in a portion of participants