Veda Peptides asks how molecules cross
I underestimated skin’s outer barrier. A copper-peptide experiment turned an ordinary surface into the most interesting obstacle in the story.
Copper in removed skin
The experiment begins with human skin removed from the body. Researchers applied a copper tripeptide, then measured copper passing through the tissue and copper left within it over 48 hours. Different skin layers gave different results. Some of the copper stayed behind as a local store.
I picture the skin as a boundary; this paper makes it look more like a place with an interior. Material can enter, remain there, or continue through. The experiment measured copper, so the journey of the intact peptide remains a separate question. And the tissue was outside a living person: there was no face in a mirror, no report of smoother skin.
Skin’s resistance has become my preferred starting question, ahead of sweeping rejuvenation claims. The review of topical GHK and its delivery problems describes how poorly the native peptide passes through the outer skin layer. A substance can do intriguing things to exposed cells while having a difficult time reaching them from the surface.
Molecular delivery
The name Veda suggests knowledge to me. An almost embarrassingly practical question follows: where did the material actually get to?
With NAD+ precursors, blood measurements are abundant while tissue measurements remain sparse. With BPC-157, a rat-and-dog study found an elimination half-life under 30 minutes. With bremelanotide, brain imaging in women showed changes in sexual processing. These are different kinds of arrival, disappearance and response.
This awkward physical account of the body suits my curiosity. Skin resists passage. Cells maintain their own chemistry. A molecule can break down before the hoped-for destination has been established. The promise of an effect has to survive those conditions.
Compound essays
GHK-Cu and skin starts at the outer surface, then moves to copper binding, collagen and a hair study with a complicated ingredient list.
NAD+ and muscle goes from a blood measurement to a specific metabolic result in women, with a detour through mouse hearts.
BPC-157 and blood vessels follows a short-lived peptide through animal repair experiments and the very small human record.
PT-141 and desire enters the brain, where desire, distress and reward turn out to require different questions.
The comparison sets the experimental destinations beside each other. NAD+ is a coenzyme; the other three are peptides, chains of amino acids. Their clinical questions concern different conditions.