I can give you some additional guidelines to go on, though
The optimal range for homocysteine is between 5-8 but the reference range on your lab test will be between 0-15, so it is important to not just be in the range but be in the optimal range
Patients may see claims such as heals tendons, repairs injuries, fixes inflammation, or speeds recovery. Those statements can be misleading if they are presented without context
Interest in such applications is largely driven by their proposed mechanisms of action, including enhancement of tissue repair, modulation of inflammation, and cytoprotective effects observed in preclinical studies
Evidence on B12 and sleep is mixed: B12 helps regulate circadian rhythm in some contexts, yet high B12 status has been linked with shorter sleep in others