It's perfectly safe and very effective to incorporate both retinol and vitamin C into your skincare routine, as long as you use them at different times of the day.
If you're determined to use vitamin C and retinol together in the same routine, you'll need to make sure to put enough time between them. It's also essential to apply your vitamin C first because it has the lower pH of the two ingredients.
The answer is a resounding YES! The combination of Vitamin C and Retinol in a skincare regimen can help you achieve glowing, healthy-looking skin, while improving the look of dark spots and uneven skin tone, as well as visibly improving signs of skin aging including fine lines, wrinkles and loss of firmness.
Apply your vitamin C first, since it has the lower pH of the two. Then, wait half an hour before you apply your retinol. Incorporating the waiting period allows your skin's pH to return to normal, so each ingredient can work at its intended pH.
It is useless to use benzoyl peroxide, which is usually used to treat acne, and retinol together, says Paviol. The ingredients can cancel the positive effects of each other out and leave skin extremely dry and irritated.
Vitamin C is effectively an acid (it's sometimes known as ascorbic acid), so layering it with AHAs and BHAs like glycolic, salicylic, and lactic acids is a big no-no.
Start by adding retinol to your evening skin routine and slowly introduce vitamin C to your morning skincare routine a few weeks later. This will help prevent any skin irritation and support a more sustainable skincare routine.
Don't Mix: Retinol with vitamin C, benzoyl peroxide, and AHA/BHA acids. AHA and BHA acids are exfoliating, which can dry out the skin and cause further irritation if your skincare routine already includes retinol.
You can use retinol with niacinamide and hyaluronic acid. Retinol tends to cause dryness and irritation, while hyaluronic acid and niacinamide hydrate the skin and maintain your skin's function as a protective barrier. Do not combine retinol with AHAs, BHAs, or Vitamin C.
First, vitamin C works to help improve the look of dark spots, fine lines, wrinkles and sagging skin. Then, retinol steps in to help improve skin's elasticity. The result is that retinol and other retinoids may help improve skin's texture while helping to minimize the look of fine lines.
In fact, retinoids work best if you use them daily. Specifically, try to use them at night because light and air deactivate some types. If you experience any side effects — like skin redness or dryness — then it's a good idea to back down to once every 2 or 3 nights.
You should always apply retinol at night, after cleansing, and before your nighttime moisturizer. Five minutes is enough to wait for your retinol to sink in before applying moisturizer; you want to layer them, not mix them.
As a general rule of thumb: Use retinol at night and vitamin C in the morning. "To get the most benefit from vitamin C, you want to use it during the day to protect the skin while exposed to environmental stressors such as the sun and pollution," celebrity esthetician and skin expert Shani Darden tells mbg.
Use retinol serums if you want to get rid of your acne scars and improve your skin texture. On the other hand, vitamin C serums are perfect if you want to enhance your skin tone, improve your collagen production, and boost your overall skin health.
Nearly across the board, dermatologists recommend incorporating vitamin C serum into your morning routine (as opposed to using it at night). The reason for this recommendation relates to its ability to protect the skin.
When to Apply Retinol Serum. To apply a serum with retinol correctly, smooth it onto clean skin after you cleanse and before your moisturizer.
Because vitamin C is an acid, you shouldn't combine it with other skin-care acids such as alpha-hydroxy acids (AHAs) like salicylic acid, and beta-hydroxy acids (BHAs) like lactic and glycolic acids. “Mixing with other acids at the same time can change the vitamin C's pH and render it useless,” Dr. Chiu says.
Though clinical trials have not shown high-dose intravenous vitamin C to produce negative side effects, it should be administered only with close monitoring and avoided in those with kidney disease and hereditary conditions like hemochromatosis and glucose 6-phosphate dehydrogenase deficiency.
(You'll want to apply your retinol product before applying your moisturizer, leaving around 10 to 20 minutes in between.) If you have dry skin, you can seal in your skincare products by topping them off with a facial oil.
Mix your retinol with your moisturizer, or apply your moisturizer first and then your retinol. Always use sunscreen the morning after you apply retinol. Your skin will be especially sensitive to sunlight, so it's important to protect it.
The immediate side effects of retinol treatment can take the form of a surge in acne, blackheads, whiteheads, and rashes. This is termed retinol purging. It lasts for about 2-6 weeks depending on the quality of the skin, following which the positive effects ramp up.