The prior authorization requirements may vary by insurance plan and typically include: Request submission: Your healthcare professional submits a prior authorization request to Aetna on your behalf

Key sources included the US Food & Drug Administration (FDA), European Food Safety Authority (EFSA), National Institutes of Health (NIH) Office of Dietary Supplements, National Center for Biotechnology Information (NCBI/PubMed), US Department of Agriculture (USDA) Agricultural Research Service, World Health Organization (WHO) Global Health Observatory, Organisation for Economic Co-operation and Development (OECD) Health Statistics, EU Eurostat Health Database, National Center for Health Statistics (NCHS/CDC), International Food Information Council (IFIC), Council for Responsible Nutrition (CRN), Natural Products Association (NPA), United States Pharmacopeia (USP), International Nomenclature of Cosmetic Ingredients (INCI), Personal Care Products Council (PCPC), Codex Alimentarius Commission, European Medicines Agency (EMA), Japan Ministry of Health, Labour and Welfare (MHLW), China National Health Commission (NHC), Health Canada, Therapeutic Goods Administration (TGA) Australia, and national health ministry reports from key markets

While age certainly contributes to the maturation of dry and wrinkled skin, it's not the main offender
For people who are on a plant-based diet or are needing extra help besides dietary intake, L-Carnitine is available in the form of supplements in liquid, capsule, or powdered form that are easily accessible