Neither supplement has robust RCT evidence specifically in healthy younger adults for antioxidant support as a wellness intervention
B12 injections deliver a high dose of vitamin B12 directly into your bloodstream
The reason they work is specific
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If the medication was left at room temperature (under 86F) overnight, it is likely still safe to use according to manufacturer guidelines for branded products
Routine supplementation with biotin is not recommended , as evidence for its benefit in telogen effluvium is limited, and high-dose biotin can interfere with certain laboratory tests (including thyroid function tests and troponin assays), potentially producing misleading results an issue highlighted in MHRA Drug Safety Update guidance