Zinc Oxide

Zinc oxide is 氧化锌 (yǎng huà xīn) in Chinese, written 氧化鋅 in Traditional Chinese. It's a mineral sunscreen filter that reflects and scatters both UVA and UVB, gentle enough for sensitive skin and babies.

Depends on the formula. At 20%+ it tends to, but modern sunscreens reduce this with smaller particle sizes, emollients, and silicones. A well-formulated product applied in a moderate amount cuts the white cast significantly.

Both are safe. Zinc oxide isn't absorbed by the skin, so there's no hormone-disruption concern; chemical filters like oxybenzone are also approved by regulators at normal doses. Choose based on skin type and personal preference.

Yes — just mind the order. Apply your vitamin C serum during the skincare steps before sunscreen, let it absorb fully, then apply the zinc oxide sunscreen. They won't interfere with each other.

Yes — it's the first-choice sunscreen filter for infants. The FDA approves zinc oxide in baby sunscreens; just pick a product formulated specifically for babies, where concentration and formula are adjusted for sensitive skin.