What sunscreen is safest for everyday use?
For occasional use, the choice between chemical and mineral sunscreen doesn't seem critical, but for every day use this changes. The safest choice seems to be large Zinc particles, but unfortunately at the cost of severe whitening. There's concern Zinc and Titanium Dioxide nanoparticles can accumulate in the skin causing UV induced toxicity, Zinc being the safer option. It's also shown that coating helps reduce reactivity, hence we've chosen 128 nm particle size silane coated ZnO as data indicaetes it's the long term safest non-whitening option there is (2011 Smijs). There's simply no non-whitening mineral sunscreen without nanoparticles.
Day UV Protect Moisturizer4:2:2:1 Lipid Complex
Day is being UV tested this year aiming for SPF 15-30, the perfect compliment to our Night lotion. We've chosen 9% 128 nm silane coated Zinc, as evidence indicates it presents the safest non-whitening option on the market.
Our 2% 4:2:2:1 ratio blend of cholesterol, linoleic, palmitic and ceramide 3 moisturizes by strengthening the skin barrier long term allowing for a light-weight formula. Vitamin C, B and E helps repair UV damage, even skin-tone and prevent blemishes.
- Face & Body. All skin types
- 75 day supply, $8/month (6 pumps/day)
- 3 fl.oz (90 ml), pH 5.5
Science
Vitamins & Lipids help repair UV damage
This was proven by (2008 Beck), Niacinamide increases the synthesis of ceramides and keratinocyte differentiation (2000 Tanno). It strengthens the skin barrier, preventing moisture loss and has been shown to prevent acne over time (1995 Shalita). Acne sufferers have 2-3 times less linoleic acid in their skin (1976 Morello), and application of 2.5% linoleic acid for 4 weeks was shown to reduce comedone size 25% over 1 month (1998 Letawe). Can also be used as a normal or after-sun moisturizer.
4:2:2:1 Lipid Complex
Ceramides, cholesterol and free fatty acids decline ~1.25%/year from age 20 (1996 Rogers).
Application of 0.02% Ceramide 3 can alone prevent 35% water loss after irritating the skin with SLS. (2008 Huang).
The same amount of lipids in a similar ratio improved skin barrier recovery as measured by Trans Epidermal Water Loss 25-30% 6 hours after tape stripping and 15% on non-challenged skin (1997 Zettersten).
Anti-Aging Regimen
1. Use Day every morning to moisturize and protect your skin from the environment (SPF not yet determined).
2. Use Night in the evening as recommended on the bottle, the older you are the more often you should apply it.
3. Use SALIC twice a week in the evening to exfoliate.