You bought the vitamin C serum because everyone says you need one. A few weeks in, you are not sure it is doing anything. The ingredient is rarely the issue. Which form you use, how it is made, and where it sits in your routine decide whether you see a difference.
What Vitamin C Does for Your Skin
Vitamin C is an antioxidant. Every day your skin meets ultraviolet light, visible light and pollution, and each of them creates free radicals, unstable molecules that break down collagen and set off pigment. Vitamin C neutralizes them before they do that damage. Your skin also needs it to build collagen, and it slows the enzyme that makes pigment, which is why it is known for brighter, more even looking skin. [1]
What you will see: a brighter, more even look first, then with steady daily use, smoother texture and softer looking fine lines. What you will not see is the part that matters most, the damage that never happens.
Why the Form and the Formula Matter
L-ascorbic acid is the form of vitamin C with the most research behind it. It is also delicate. To get into skin it needs an acidic formula, and absorption climbs with concentration up to about 20 percent, with no added benefit beyond that. [2] It breaks down with light and air, so the formula, the bottle and how you store it all count.
Pairing is what makes it hold up. In a laboratory study on skin, adding vitamin E and ferulic acid to vitamin C made the solution more stable and doubled its protection against UV damage, from about fourfold to about eightfold. [3] That research is the formula behind SkinCeuticals C E Ferulic: 15 percent L-ascorbic acid, 1 percent vitamin E and 0.5 percent ferulic acid.
Which Vitamin C Serum Is Right for You
- You want the most researched formula. C E Ferulic is the one the study above was built on.
- Your skin gets congested or inflamed. iS Clinical Pro-Heal Serum pairs vitamin C with olive leaf extract and vitamin E to calm the look of redness while it protects.
- You want broad antioxidant cover in one step. SkinBetter Science Alto Advanced layers vitamins C and E with a wide spread of other antioxidants.
See the full Vitamin C collection, or shop by concern: Dark Spots and Uneven Tone and Fine Lines and Firmness.
How to Use It
Every morning, on clean skin. In a Sapien routine it goes after cleansing and after Plated, before moisturizer, eye cream and sunscreen. Four to five drops covers face, neck and chest. Let it settle for a moment before the next step.
Vitamin C works with sunscreen, not instead of it. Sunscreen filters the light and vitamin C handles what gets through, so you want both every morning, whatever the weather and whether or not you leave the house. Sunscreen is always the last morning step. Find yours in Daily Sun Protection.
Keep the bottle closed, out of light and away from the heat of the shower. A serum that has turned dark amber or brown has oxidized and is ready to be replaced.
Questions
Can I use vitamin C with retinol?
Yes. Vitamin C in the morning, retinol at night. Each one gets its own time of day, so you get the benefit of both without stacking them.
Is a little tingle normal?
A light tingle can happen with acidic L-ascorbic acid formulas, mostly in the first week. If your skin stays red or uncomfortable, stop and ask us. There is a vitamin C for every skin, and we will help you find yours.
How long until I see a difference?
Brightness usually shows first, over the first several weeks of daily use. Texture and fine lines change over months, because collagen builds slowly.
Do I still need it if I wear sunscreen every day?
Yes. No sunscreen filters everything, and vitamin C works on what gets past it. The two together protect more than either one alone. [3]
Working on dark spots or firmness beyond what a serum can do? See our discoloration treatments and aging treatments in Seattle.
Why a Routine Made for You Works Better
General advice is written for everyone, so it has to assume nothing about you. It can tell you what is safe. It cannot tell you what will work for your skin.
A skin therapist looks at your skin, your health, your lifestyle, what you use now and what you want to change, then builds a routine you will actually keep and adjusts it as your skin responds. That is why we guarantee our products when they are part of a routine designed by one of our skin therapists.
References
1. Al-Niaimi F, Chiang NYZ. Topical vitamin C and the skin: mechanisms of action and clinical applications. J Clin Aesthet Dermatol. 2017;10(7):14-17. PMID 29104718
2. Pinnell SR, Yang H, Omar M, et al. Topical L-ascorbic acid: percutaneous absorption studies. Dermatol Surg. 2001;27(2):137-142. PMID 11207686
3. Lin FH, Lin JY, Gupta RD, et al. Ferulic acid stabilizes a solution of vitamins C and E and doubles its photoprotection of skin. J Invest Dermatol. 2005;125(4):826-832. PMID 16185284
