do vitamin b12 injections cause constipation in deficiency is primarily neurogenic, due to autonomic and enteric neuropathy causing slow gut motility • Constipation may precede anemia • Often improves after B12 replacement • Think of B12 How Long Does It Take

The mechanism works through appetite suppression, delayed gastric emptying, and improved insulin sensitivity

Toxic neuropathy (G62.2): Code first (T51T65) toxic substance

Theoretical risks Long-term or high-frequency use raises theoretical concerns about copper accumulation

See will GHK-Cu regrow hair and what is AHK-Cu used for

Specifically, it produces no IGF-1 elevation (avoiding proliferative concerns), no negative impact on glucose metabolism (avoiding diabetes risk), no fluid retention or edema, and no concerning patterns of joint pain that can occur with growth hormone

Comfort with Injections Are you comfortable with self-injecting, or would you prefer a non-invasive treatment