Which one is good for our skin and doesn't tan sunblock or sunscreen and why?

Sunscreen is generally better for the skin because it provides broad-spectrum protection against both UVA and UVB rays, preventing skin damage and premature aging without causing tanning. Sunblock typically contains physical ingredients like zinc oxide or titanium dioxide that reflect UV rays, but it may not offer the same level of protection against the full spectrum of UV radiation as a well-formulated sunscreen. Additionally, sunscreen is often lighter and more suitable for daily use, allowing for better skin absorption and comfort.