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al., Sympathetic Neurotransmitter, VIP, Delays Intervertebral Disc Degeneration via FGF18/FGFR2-Mediated Activation of Akt Signaling Pathway, Advanced Biology (2023)

They can be derived, both from plants and animals

Vitamin D status and its relationship with bone mineral density in healthy Asian Indians
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In this study, CH/BPC composite hydrogel was fabricated and characterized for their physicochemical properties

It's, it's that you can't legally do it in the US right now, but China, these are things that they're doing
