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Although dairy and meat products are usually considered good food sources of vitamin B12, the actual B12 levels contained in these products tend to vary greatly, as livestock is regularly supplemented with B12 injections to avoid deficiencies, making for a less than reliable (and natural!) source
Heavy bleeding can have several causes
This week it is atai Life Sciences and Beckley Psytech reporting the positive results from their Phase 2a open-label study evaluating BPL-003 in Patients with Treatment Resistant Depression

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This identified "LLD factor" as essential for the bacteria's growth