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Research indicates that liposomal formulations delivered using iontophoresis significantly enhance the transdermal transport of encapsulated proteins (such as platelet-rich plasma), propranolol, diclofenac, and peptides in both porcine and human skin, surpassing passive diffusion methods [251253]

PMID 20052586

And I use this a lot in my presentations when I'm talking about vitamin D and longevity

The best collagen for glowing skin can help improve texture and brightness, giving your skin a radiant, well-rested appearance

Key pathways influenced include PI3K/Akt and MAPK, which control protein synthesis, nutrient utilization, and cell division

First comes toner or essence, just enough to wake up your skin