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The fix: Know the difference between normal adjustment (mild tingling, slight redness that fades within an hour) and problem reactions (severe stinging, persistent redness, worsening skin)

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Some promising compounds based on in vitro and in vivo testing fail during human clinical trials due to the species-specific differences in pharmacokinetics and toxicology [267]

Toxicity thresholds: Most vision peptides show wide safety margins, toxicity occurring only at doses far exceeding therapeutic ranges

[DOI] [PMC free article] [PubMed] [Google Scholar] 84.Kamiski P., Baszyski J., Jerzak I., Kavanagh B.P., Nowacka-Chiari E., Polanin M., Szymaski M., Woniak A., Kozera W