Can I Start Using Retinoids at Age 16 and if So How Can I Attain the Prescription Drug Instead of the Drug Store Versions?

Since I am 16 I always have to go to my general doctor before I can be transferred to an actual dermatologist; however I do not have any acne, just a lot of sun damage. Is this a legit reason to get a prescription retinoid at this age? And if I cannot get the prescription drug what form of retinoid would you recommend using? Retinaldehyde? Neutrogena's retinol product? I don't want a quick fix, rather something that builds by immunity to aging over time. Is is safe to use over a long period?

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