Altruist Dermatologist Sunscreen Face Fluid SPF50

Altruist is our standout value pick. Founded by consultant dermatologist Dr Andrew Birnie, the brand runs on deliberately thin margins and part-funds work supporting people with albinism in Africa, so you get modern broad-spectrum protection with a conscience. The Face Fluid leans on well-regarded photostable filters (Tinosorb and Uvinul types) for high UVA cover, and applies as a light, easily absorbed lotion that plays well under makeup. It is not quite as invisibly cosmetic as pricier rivals, the range is smaller, and it can leave a faint cast if you over-apply, but for reliable daily protection at this price few match it on cost-per-use.