animal studies suggest it may support healing of gastric ulcers and damaged intestinal lining Preclinical models suggest it may help modulate inflammation, though this has not been established in controlled human trials Known risks and side effects: Because it is sold as an unregulated research chemical rather than a manufactured pharmaceutical, product purity and dosing accuracy cannot be verified, and the FDA has flagged potential impurities and manufacturing-quality concerns FDA's Category 2 determination specifically cited potential immune reactions and hypersensitivity as a safety concern User-reported (non-clinical-trial) effects include injection-site irritation, redness, or swelling, along with occasional headache, nausea, or lightheadedness, based on anecdotal reporting rather than controlled studies No long-term human safety data exists

[1] [3] Patients with dietary deficiency and intact absorption may require less frequent injections or may be suitable for high-dose oral supplementation instead (typically 50-150 micrograms of cyanocobalamin daily between meals)
It is important to get B12 levels tested
2016 May;37(5):1738-48
If youre curious whether these are right for you, wed love to talk
Salsalate for arthritis: a clinical evaluation