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They can have signaling roles for hormones, neurotransmitters, growth factors, and also serve structural roles in tissues and organs

Key characteristics: 28 to 90 day beyond-use date from preparation (varies by pharmacy) May or may not contain preservatives Multi-dose vials requiring multiple punctures Potency can vary between batches Different pharmacies produce different quality levels Storage requirements may differ from brand-name The variability between compounding pharmacies is significant

Rosenberg, S.W

Endogenously present in human plasma, its levels decline with age

Think of it less like a quick fix and more like a long-term strategy for healthier, more resilient skin