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Explanation : The heat stress from the sauna stimulates the pituitary gland to release growth hormone, which aids in tissue repair and growth

The disruption of the balance between oxidative and reductive activities in the cells leads to oxidative stress, by an increase in ROS production and a reduction of their scavenging

doi: 10.1038/nm.3258 87

guidance for industry

Jayatilake N, Mendis S, Maheepala P, Mehta FR

The key insights from this guide create a clear framework for retinol success: Essential Avoidance Rules: Never combine retinol with AHAs, BHAs, or other exfoliating acids on the same night to prevent over-exfoliation Separate vitamin C and retinol into different routines (AM vitamin C, PM retinol) to maintain optimal effectiveness Avoid combining retinol with benzoyl peroxide to prevent oxidation reactions Skip physical exfoliants on retinol nights to prevent mechanical damage Choose fragrance-free, essential oil-free products to minimise sensitisation Powerful Enhancement Combinations: Hyaluronic acid provides essential hydration support during cellular renewal Niacinamide strengthens barriers whilst reducing inflammation Ceramides create protective environments for optimal retinol function Peptides enhance collagen formation whilst retinol accelerates renewal Strategic sunscreen use protects your investment in retinol benefits The distinction between our Starter Retinol and Advanced Retinal ensures you can choose the appropriate strength for your experience level and skin sensitivity