For observational studies (cohort and case-control), the NewcastleOttawa Scale (NOS) (La Torre et al., 2014), was applied
Contraindications, Drug Interactions, and Monitoring Important precautions include: Avoiding use in active, untreated malignancies due to theoretical tumor-promotion concerns Using caution with immunosuppressants Monitoring blood pressure and liver enzymes if treatment exceeds six weeks Consulting a healthcare professional if you have bleeding disorders or take anticoagulants Bodybuilders who use multiple compounds should be especially careful because side effects and interactions may be harder to identify
A study found that giving 1000 mcg of B12 intramuscularly is common
Apart from vegans and people with gastrointestinal conditions, infants and children from B12-deficient mothers and the elderly are at particular risk of B12 deficiency
Unlike oral supplements that must pass through your digestive system, methyl B12 injections deliver the vitamin directly into your bloodstream for maximum absorption
There is no clinical consensus on timing