Systematic review with dose-response meta-analyses between vitamin B-12 intake and European Micronutrient Recommendations Aligned's prioritized biomarkers of vitamin B-12 including randomized controlled trials and observational studies in adults and elderly persons
If it sat out at room temp for more than 4 hours, toss it
It actually might be good for your gut, but its not good for your patellar tendinopathy, but then a lot of those people say, No, I feel a lot better, because they were taking it for two months, and maybe just over the two months of rehab and stuff, they got better
Intranasal treatment (via a nasal spray) of B12 is also available through a prescription (Andrs, 2018)
Pro Tip: Work near a clean surface, not directly over a sink or fan