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Never Skip SPF This cannot be overstated: brightening ingredients make UV damage worse if you dont protect against it
doi: 10.1038/s41575-023-00771-6, 25
Prescription tretinoin is more potent and potentially irritating than over-the-counter retinol or retinaldehyde
When cellular glutathione levels drop, the accumulation of unneutralized reactive oxygen species provokes mast cells to become hyper-reactive, inappropriately releasing massive quantities of histamine into the bloodstream
Freezer storage at -20 degrees Celsius extends shelf life further for long-term storage, but avoid repeated freeze-thaw cycles with any peptide
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