Preparing for a skin aging lab test („Hautalterung Labor“) depends on the specific biomarkers measured – common ones include advanced glycation end products (AGEs), oxidative stress markers, collagen peptides, or hormones like cortisol. General preparation: fast for 8–10 hours (water only), avoid coffee, tea, and nicotine on the morning of the test. Stop supplements such as biotin, vitamin C, or collagen at least 48 hours before, as they can interfere with assays. Avoid intense exercise and alcohol for 24 hours prior, since they transiently alter inflammatory and stress markers. If a saliva profile (e.g., diurnal cortisol) is included, adhere strictly to timing and rest instructions. Evidence for direct skin aging biomarkers in blood is still limited – many tests rely on mechanistic or animal data rather than robust human trials. Ask the provider which parameters are measured and whether age-adjusted reference ranges are available. Without that, results are hard to interpret. For personalized advice, consult a healthcare professional.
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