![]() But going over 20 percent could lead to irritation and doesn’t increase its benefit. You definitely want a concentration that’s higher than 8 percent for maximum effectiveness. ![]() Make sure this good-guy ingredient is close to the top of the label, ideally as one of the first five ingredients.Ĭoncentration: The sweet spot for the concentration level is between 10 and 20 percent. An older study comparing common vitamin C derivatives with L-ascorbic acid didn’t show an increase in absorption. Always use SPF with vitamin CĪlthough vitamin C serum isn’t a substitute for sunscreen (in fact, sun sensitivity increases with use), the two together can work in tandem to boost the skin’s protection from damage.įorm: Vitamin C can appear on the ingredient label as several different names, but the one you want is L-ascorbic acid, which is the most effective. It’s been found that topical vitamin C is best applied after exposure to UV light and not prior. This can be achieved by applying every eight hours.Īlso, UV light lowers the skin’s vitamin C levels. Vitamin C’s protection and free radical-fighting prowess eventually wears off, but you can build up a reservoir for adequate photoprotection. Unlike sunscreen, moisturizers, or oils, vitamin C can’t be wiped or washed off that easily. Think car exhaust, cigarette smoke, certain chemicals, even booze and overprocessed foods.īut don’t worry if you skip an application. Vitamin C has photoprotective properties and staves off oxidative stress from the free radicals we meet throughout our day. One study even recommends applying a vitamin C serum every eight hours, or twice daily for the pinnacle of protection. If you’re wondering when to apply a vitamin C serum, the answer is both morning and night, after cleansing and toning. Here are some of the posts and reviews I found: So I emailed the manufacturer and within an hour they emailed back and said the pH is approximately 2.4! Yay!! Keeping in mind that LAA has to be at a pH of 3.5 or less to be effective, I looked high and low to find the pH of the Timeless serum, but couldn't find it. So Timeless was a promising option since it met those criteria, and was waaaay cheaper than other LAA Vit C serums with E and Ferulic Acid. I also decided that I wanted it with Vitamin E and ferulic acid since there's research showing that Vitamin E and ferulic acid stabilize the LAA and double photoprotection, even though the OST Vitamin C comes with some very positive reviews on r/AB. I decided I wanted LAA (L-Ascorbic Acid). I've struggled to decide on a vitamin C since there are approximately a jillion different discussions/reviews on SCA and AB and the blogosphere about various Vitamin C's. If you have any suggestions or things to add, please message the mods! Note that abusive or rude treatment of mods is not tolerated.Īfter my bottle of Paula's Choice Vitamin C Super Booster arrived a lovely golden shade, I decided it was out of the running for my holy grail Vitamin C. Japan, Taiwan, India, South Korea, China, Indonesia, Singapore, etc.
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