Retinoids are my absolute favorite skincare actives for smoother texture, fading lines, improving tone, and getting that healthy glow. I split them into two tiers: stronger Retinaldehyde (faster and more powerful) for bigger results, and gentler Retinol starters for beginners or sensitive skin. Retinaldehyde converts quicker in the skin so you often see changes sooner, but always ease in slowly, use at night, buffer with barrier serums, and wear SPF daily.