Pros: Extended half-life compared to unmodified MGF, in theory allowing fewer, more practical dosing intervals Mechanism aligns with well-studied endogenous muscle-repair biology (satellite cell activation, IGF-1 pathway) Widely available from research-chemical vendors for lab/research purposes Cons: No FDA approval, no completed human clinical trials, and no regulator-reviewed safety or efficacy data Prohibited in competitive sport under WADA growth-factor rules Product quality and purity vary significantly between unregulated research-chemical suppliers Side Effects: Not well characterized due to the absence of an approved label
Kh., Razumovskii, M
Although promising, this strategy has limitations as it does not fully address the extramitochondrial roles of glutamine, which include the RAS-independent activation of mitogen-activated protein kinase signaling 59
Oral absorption is considered too undependable to rely on in patients with pernicious anemia or other conditions resulting in malabsorption of vitamin B12
Cardiovascular and Metabolic Safety Because PT-141 may cause transient elevations in blood pressure, it is contraindicated in patients with uncontrolled hypertension or significant cardiovascular disease
The control subjects with no depression had normal levels of LAC
