What Happens to Your Skin When You Use Vitamin C and Retinol Together

Vitamin C and retinol (a form of vitamin A) are two of the most common ingredients in modern skin care products, largely due to their anti-aging effects. When applied to the face, either vitamin can reduce wrinkles, correct dark spots, and increase collagen production, helping skin appear plumper and healthier.

You can choose to purchase a skincare product that contains both vitamin C and retinol, or layer individual products. It’s important to know how ingredients interact, how their benefits and side effects may increase when used together, and how to incorporate them into your routine.

Vitamin C and retinol are both active ingredients. Topical vitamin C is more helpful in lightening skin and preventing sun damage, while retinol is generally more powerful and effective in stimulating cell turnover and keeping skin youthful.

Products that mix these ingredients might be just what you’re looking for, although results regarding their combined effects are mixed.

In one study, researchers looked at the effects of a skin care routine involving a 0.5% retinol treatment and a 30% vitamin C moisturizer on people with hyperpigmentation and photodamage. Participants saw improvements in tone and texture at 4, 8, and 12 weeks of the study, with only some initial dryness as a side effect.

Another study found that a skin peel combined with retinol and vitamin C increased the amount of skin lipids (fats) in postmenopausal women. Menopause often causes dry skin, and increasing skin lipids can improve the skin barrier and keep skin hydrated and healthy.

Expected results and timeline

The two studies mentioned above looked at the effects of a retinol-vitamin C combination treatment after 12 weeks and both found improvements in skin tone and texture.

In the study using 0.5% retinol and a moisturizer containing 30% vitamin C, participants had fewer signs of photoaging, which typically includes dark spots, wrinkles, loss of elasticity, and uneven skin tone.

In the study using a retinol and vitamin C skin peel, participants experienced an increase in skin lipids in the areas of the forehead, cheeks, nose, chin, and neck. This likely means they saw an overall strengthening of the skin in those areas. The lipid layer is responsible for providing a barrier against damage and infection and preventing moisture loss.

The combination of these ingredients can irritate your skin, so it’s best to introduce it slowly.

Anyone with sensitive skin who is considering trying a new skincare product, especially one containing an active ingredient like vitamin C or retinol, should introduce the product slowly. Perform a patch test on a small area of ​​skin, applying the product twice daily for 7 to 10 days.

Once you begin incorporating the product into your routine, consider using it every other day or 2-3 times per week and gradually increase your frequency of use to avoid excessive irritation.

Vitamin C is generally safe for most skin types. Some people may experience mild tingling, redness or rash, or dry skin after using vitamin C. Applying a moisturizer after the vitamin C product can reduce some of this irritation.

Retinol is considered safe for most people, but most often causes mild side effects, especially with higher doses and prolonged use. Typical side effects include excessive dryness, redness, itching, and peeling.

People with sensitive skin, conditions that make them prone to redness or inflammation, or untreated acne may need to choose a gentler product. No retinoid products are currently considered safe for use during pregnancy.

Some people may use retinol and vitamin C at the same time, either layering them one after the other or using a product that contains both ingredients. However, skin care experts generally don’t recommend it because it could cause irritation. Instead, consider using vitamin C as part of your morning skincare routine and retinol in the evening.

Vitamin C has protective effects against light damage, so applying it in the morning is particularly beneficial, especially if you also use daily sunscreen.

Topical vitamin C is often available in serum form. You can apply serums after cleansing and toning but before moisturizing. Some toners and moisturizers also contain vitamin C in their formulation, so you won’t need to use a serum.

Retinol is usually recommended as part of a nighttime skincare routine because it can make your skin more sensitive to the sun. Applying retinol at night protects your skin from UV exposure while it is absorbed. However, it is still important to use a broad-spectrum sunscreen (or limit sun exposure) the next day.