Vitamin C serum is typically applied once or twice per day. A good rule of thumb is to cleanse, tone, apply vitamin C serum, and then moisturize. It can be safely used with other active ingredients, although using alongside niacinamide may make vitamin C less effective.
Always allow your serum to absorb for 60-90 seconds, to ensure it has time to penetrate the skin. Follow up with a moisturizer to lock in the goodness of your serum, and bolster your skin's protective lipid barrier.
In terms of when you should use it in your routine, Corinthian suggests a three-step system of cleansing, treating, and moisturizing. That second step would be vitamin C application, followed by moisturizer, unless you have oilier skin and prefer to use a serum on its own.
Use a water based or non comedogenic moisturizer which means it doesnt clog your pores. AcneOC is a good one which is light, non-greasy and non comedogenic.
Serum and Moisturizer: 1 minute
Goldenberg's go-to recommendation for timing between serums and moisturizers is about one minute. This wait has the same reasoning: Sixty seconds — give or take — gives each product a moment to delve into your pores.
To allow serums to fully absorb, apply and wait 5 minutes before moisturizing. Take note: Well-formulated serums absorb quickly and disappear into your skin. If they leave an oily or sticky residue, they're not doing their job well.
In most cases, it makes sense to apply serum before moisturizer. This is because serum is usually more lightweight, whereas moisturizer tends to be thicker. Applying serum first can also give the skin more opportunity to absorb the active ingredients. In many skin care routines, moisturizer is the last step.
Ultimately, face serum and moisturizer are both necessary for a holistic skin care routine and to ensure that your skin doesn't dry out during the day. Face serum can't replace moisturizer, and moisturizer doesn't give your skin the extra vitamins and nutrients it needs to succeed and look great for years to come.
“I recommend using vitamin C products twice daily for maximum benefits,” Dr. Chang said. “If used in serum or essence forms, it should be applied after cleansing and before your thicker moisturizers and creams.”
Once your vitamin C serum has dried down, apply moisturizer. This order is crucial because applying moisturizer before your serum could block your skin from absorbing all of its goodness. If applying in the morning, follow with a broad-spectrum sunscreen with an SPF 30 or higher.
Vitamin C serum benefits
If you're wondering when to apply a vitamin C serum, the answer is both morning and night, after cleansing and toning. One study even recommends applying a vitamin C serum every eight hours, or twice daily for the pinnacle of protection.
AHAs and BHAs, such as glycolic, salicylic, and lactic acids should never be used with Vitamin C. Vitamin C is an acid, too, and is unstable, so the pH balance will be thrown off by layering these ingredients together and might as well be useless.
A thick moisturizer with hyaluronic acid would be applied after a vitamin C serum, but a hyaluronic acid serum will come before a face cream with vitamin C in its formula. In the case that you have two separate serums, it still comes down to thickness. Apply whichever is thinner first.
For those with sensitive, reactive skin, certain forms of vitamin C can be shockingly irritating, leading to dryness, peeling, and redness. But you shouldn't bin your vitamin C serums or moisturizers right after reading that.
If your skin's happy with serum alone, you can skip moisturizer. But only a lucky few with normal and super oily skin can get away with this, in my experience. So, don't be too disappointed if your skin needs both.
Vitamin C serum (leave to absorb for 1-2 minutes)
Dr Khan explains: “With vitamin C, you want to get the most out of the product by not diluting it. A couple of minutes should be an adequate time for the product to dry down before you go in with your next step.”
As a rule, serums should be the first products that touch your skin after cleansing and exfoliating in order to get the best results. Never apply them after your moisturizer as thicker creams and oils create a protective layer over your skin and hinder absorption.
A Vitamin C serum should be used in your bedtime routine and a couple of drops of it should suffice. Tap it on your skin using your fingertips and leave it on overnight. Wash your face in the morning and apply SPF to avoid any skin irritation.
Don't Mix: Retinol with vitamin C, benzoyl peroxide, and AHA/BHA acids. AHA and BHA acids are exfoliating, which can dry out skin and cause further irritation if your skincare routine already includes retinol.
Retinoids and serums can be used together, especially if the serum is soothing or hydrating. Be careful using very aggressive face oil serums with retinoids.
And wearing antioxidants at night still helps you fight sun damage the next day. "Your body builds up a storage of antioxidants as you use them," says Zeichner, "so using vitamin C serum at night will help guarantee your body has enough ready to go in the morning when you need them most."
No, it does not. It may stain your skin but it cannot darken your skin. It is important to know the difference between staining and darkening the skin. Staining is where the product reacts with your dead skin cells and leads to a change in the color of those dead cells.
Some of the most common side effects include: itching. redness. skin irritation.