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References 1 AnX.-H.TianY.ChenK.-Q.WangX.-F.HaoY.-J
Receptor sensitivity in reproductive tissues can change
& Blair, I
This bypasses the GI tract entirely, which is the whole point: it's designed for people whose digestive system can't absorb B12 reliably
Reputable suppliers ship lyophilized compounds with appropriate insulation and, for temperature-sensitive orders, cold packs or gel packs designed to buffer against ambient temperature during transit
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