1. Vitamin C + AHAs or BHAs
This is a recipe for disaster.
Since all of them are acids, combining them can irritate your skin, especially if your skin tends to be on the drier side. Start by using them at separate times of the day. If you have very tolerant skin, then sure, go ahead. It is technically safe to use them together, but do a test patch first to see if your skin can take it.
2. Benzoyl Peroxide + Retinol
Using both of these ingredients together deactivates the effect of the other. Applying benzoyl peroxide, which is an infamous acne treatment, along with retinol, will oxidise the retinol, hence reducing its effectiveness.
Benzoyl Peroxide will oxidise Vitamin C the same way, hence, I highly advise to use these ingredients on alternate days.
3. Benzoyl Peroxide + Chemical Exfoliants
I don’t think I even need to explain why this is a bad idea. Please don’t do it. Benzoyl Peroxide dries out your skin and removes the top layer of the skin. Mixing chemical exfoliants here will do nothing but irritate your skin and damage the skin’s barrier.
4. Retinol + Exfoliants (physical or chemical)
Retinoids do a great job exfoliating your skin as they help speed up the renewal process. If you add another layer of exfoliation on top, you’re preparing yourself for some serious tomato redness, and not the kinds that will disappear overnight. They can be used the same day, but at different times. You can apply retinol at night and exfoliate in the morning (but never forget sunscreen!).
5. Exfoliants + Sonic Brush
Same reason as above. Exfoliating once or twice a week is sufficient.
6. Salicylic Acid + Glycolic Acid
Two words – very drying. Use them separately to keep your skin healthy.
7. Water-based and oil-based skincare
These two can definitely be used together, however, you should be careful about the order in which you use them. Apply your water-based products before the oil-based products. If not, penetration of the water-based products will be limited.
I hope you learned something new and can hopefully avoid some serious skincare faux pas. Is there any other skincare combination that you know of that should be avoided at all costs? Let me know in the comments below!
Featured photo: The Zoe Report