Detailed answer

Some sunscreens contain heavy or occlusive ingredients like mineral oils, silicones, or waxes that can create a barrier on the skin's surface. This barrier can prevent proper skin exfoliation and cell turnover, leading to a buildup of dead skin cells. Dead skin cells can make the skin appear dull and lackluster. Additionally, some sunscreens may not adequately protect against UVA and UVB rays, which can cause damage to the skin and contribute to dullness. To avoid skin dullness, opt for lightweight, non-comedogenic sunscreens that provide broad-spectrum protection and do not contain heavy occlusive ingredients.