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While some over-the-counter supplements like collagen are allowed, many therapeutic peptides fall into a grey area that confuses consumers
PubMed PMID: 10528308
Oral collagen peptides Collagen peptides are widely sold as supplements and have the most accessible evidence base of the peptides discussed for knees
Vitamin B12 is a water soluble vitamin, so it is pass through the urine, excess amounts have not been shown to cause any harm
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