For a long time, highlighter felt like one of those makeup products with a universally flattering reputation. A little glow on the cheekbones , brow bones, or inner corners of the eyes, and suddenly the whole face looks fresher, brighter, more awake. But after watching my mom and grandma test product after product for this story—swiping on highlight sticks , liquids, balms, and powders under every possible bathroom light—I realized mature skin requires a slightly different approach to glow. That’s because, “as we age, the skin changes that can affect its texture, tone, and appearance," beauty content creator Sonia Ramos tells me. "You’re more likely to be dealing with dryness, dark spots , wrinkles, loss of firmness, texture, pores, dullness, and fine lines in your 40s, 50s, 60s, 70s, [and] 80s.” And yes, I know what you’re probably thinking: Why would you want to highlight and draw attention to skin when all of that is happening? But during testing, my mom and grandma actually found the opposite to be true.…