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Unlike oral supplements, which face the gauntlet of our digestive system (and often get broken down, resulting in as little as 20-50% absorption), intravenous delivery bypasses the gut entirely
These compounds are often obtained through unregulated sources that may lack quality control standards
Dymek, K
Vitamin B12 use while breastfeeding
Even when the BAC was available on Amazon, I never ordered from Amazon, because I was always afraid of the purity
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