From personal experience, the white cast on mineral sunscreens can be a real concern, especially for those with medium to dark skin tones. Brands like UnSun Sunblock and Koolsol have gained popularity because they aim to reduce this effect by adding tints that better match various skin tones. If you're exploring mineral sunscreens, it's helpful to check if the product contains titanium dioxide or zinc oxide in nanoparticle form, which can reduce the white cast but still provide effective protection. Another tip I've learned is to look for formulations with added boosters or antioxidants to enhance skin compatibility and appearance. Applying mineral sunscreen with a damp sponge or blending it carefully can also help minimize the white cast. Remember, daily sunscreen use is essential, so finding one that feels comfortable and looks natural on your skin will encourage consistent use. Ultimately, while no mineral sunscreen is completely free of a white cast without tints or boosters, options like UnSun and Koolsol show that the market is evolving toward more cosmetically elegant solutions. Trying samples or reading user reviews can help you find the best fit for your skin tone and preferences.