Because they are unable to get it
Since peptides mimic natural processes already happening in the body, most people tolerate them well
N., Orlova, A
Researchers entering the peptides for senior dogs research subfield should reference the existing veterinary peptide literature, design protocols with appropriate controls, and work with veterinary oversight throughout
For example, a 2021 review discussed possible ways NAC could help counter ROS-related survival, metastasis, and drug-resistance pathways in triple-negative breast cancer.39 And in a small uncontrolled pilot study involving women with breast cancer, NAC supplementation was associated with reduced markers of tumor cell proliferation.40 But animal research has found concerning effects in other contexts
There was also a dose-dependent effect on BW gain, but no effect on total IGF-I levels, IGFBPs, or serum markers of bone formation and resorption