About skincare products and supplements in particular.
But [Heidi] Waldorf hits the bull’s-eye: “Realistic expectations are key. From a long-term and cost-benefit perspective, a gentle non-soap cleanser, moisturizer, prescription retinoid, and sunscreen, with or without an over-the-counter, science-based anti-aging topical cosmeceutical (for example, peptides or antioxidants), will do more for you than a supplement and for less money.”
https://www.thecut.com/article/will-hyaluronic-acid-supplements-help-my-skin.html
Editor's comment: Most skincare products are bullshit. Stick with the basics and drink lots of water. As for the retinoid, my dermatologist recommends Differin gel, available OTC - no prescription needed. I use it every other day so a little tube lasts for quite a long time.