So you’ve researched what skincare products to buy and finally made your purchase. But did you know that if you use different skincare products at the same time you could actually cancel out the benefits of the very ingredients you purchased the product for?
Don’t mix copper peptides and vitamin C – using the two together, even if they are in separate products, just cancels out the effects of both.
Don’t mix retinol and benzoyl peroxide – both ingredients are great for fighting acne but if they are used at the same time they simply counteract one another.
Don’t mix retinoids or hydroquinone with glycolic acid – once again if you mix these ingredients they become inactive.
Hydroquinone and retinoids can only be combined together in specially formulated products like Tri-Luma (which is used to fight hyperpigmentation).
And sometimes too much of certain ingredients is just bad for your skin:
Be alert to signs of redness, irritation, or excessive and prolonged peeling if you use products with AHA (alpha hydroxy acids like lactic, glycolic, malic, etc.), vitamin C, and retinol all at once. For instance all in one day you may use a cleanser with glycolic acid, a moisturizer with vitamin C, and a retinol cream or serum at night. You may find that your skin becomes sensitive to the use of so many potent ingredients. If that is the case cut out one or more of the products with the strong ingredients or stagger the use of the products (skip a day or use a product just once a week).
Source and Further Reading:
- Ingredients You Shouldn’t Combine New Beauty Spring-Summer 2009, page 40
- 5 Skincare Mistakes That Will Make You Look Older The Skin Guru blog, January 6, 2010