Subscribers’ exclusive: What does it mean if something “improves radiance” or “brightens skin”? Hydration and moisturization

What does it mean if something “improves radiance” or “brightens skin” or makes skin more “luminous”? Well, sir or madam, you’ve asked quite the awesome question there! Let’s dive down that rabbit hole! Smooth skin reflects more light, wrinkled skin reflects less light because it’s not a smooth surface and can appear dull or rough….