Yes, sunscreen is crucial when using A Ret Gel 0.05%. This topical retinoid, containing 0.05% tretinoin, increases skin cell turnover and makes the skin more sensitive to sunlight. Exposure to UV rays without adequate protection can intensify the risk of sunburn and contribute to skin damage. Applying sunscreen with a high SPF is essential to shield the skin from harmful UVB and UVA rays. It not only helps prevent sunburn but also safeguards the skin from premature aging and potential long-term effects of sun exposure. Incorporating a broad-spectrum sunscreen into your daily skincare routine is strongly advised when using A Ret Gel 0.05% to optimize its benefits while ensuring the overall health and protection of the skin.