[QUOTE=my funny valentine;444973]The ingredients that show the most consistant results are retinol, Retin-A, vitamin C, AHAs so a serum with a high enough concentration of those actives should produce results.
Vitamin C is awesome but very unstable in products, so it may be inactive by the time you purchase the product unless it has been stabilized by the addition of vitamin E and ferulic acid ie Skinceuticals C E ferulic, or you use it in waterless (anhydrous) form ie Cellex-C. At the moment I’m using a DIY 10% anhydrous C E serum that I make small batches of so I know it’s fresh.
Sunscreen is probably the most important anti-aging skin care product but there is more to choosing an effective sunscreen than the SPF. If the sunscreen uses chemical filters often the sunscreen ingredients break down very quickly in the presence of UV light, and worse, releases free radicals into your skin. Look for something with zinc oxide (at least 10%) instead.
I’ve just posted an epic sunscreen post which goes through all of this.[/QUOTE]
Is Vit C really that unstable? Hmmm does that mean Vit C serums like Ultraceuticals and ASAP Super C are not effective or not as effective as they can be?