This Ingredient Is More Potent Than Retinol — Should You Be Using It?

And then there are those that fall somewhere in between—ever wished there was a middle ground? Well, you're in luck: Retinaldehyde may be the answer.

"Retinaldehyde is a type of vitamin A and is the strongest form of over-the-counter retinoids," board-certified dermatologist Marisa Garshick, M.D., FAAD, tells mbg. Retinol in general is a precursor to retinoic acid, meaning it converts to retinoic acid when applied topically. However, retinaldehyde requires fewer steps to be converted to retinoic acid as compared to retinol, which is why it's considered more potent. "[Retinaldehyde] only requires one step to be converted to retinoic acid in order for it to have its effect on the skin," Garshick explains. 

Many people look to prescription-strength retinoids for acne treatment, and for a good reason: These formulas (most notably tretinoin) are stronger than OTC options. But some people, especially those with sensitive skin, may not be able to tolerate prescription-strength products, as they can be drying and irritating. For many, retinaldehyde functions as a strong (yet not too strong) middle ground. 

Say you've used OTC products but haven't seen the results you're looking for—in this case, retinaldehyde may be a great option to bump up the potency just a bit. On the other hand, if you've used prescription-grade retinoids and found that they irritate your skin, this ingredient may be a better option for you to test as well. "While it can be used by all skin types, [retinaldehyde] is especially great for someone who is unable to tolerate a prescription retinoid, as may be the case for someone with dry or sensitive skin," Garshick explains. 

That being said, any form of vitamin A may cause irritation, especially if used incorrectly. If you haven't used any form of retinol before, it's best to start with a more gentle product and work your way up. "If you 'start low and go slow' (start with a gentle retinoid and slowly work your way up to a stronger one), most people will be able to have a long and happy relationship with retinoids that will keep their skin looking fresh and smooth," Marcus says. Meaning, retinaldehyde may not be for you if you haven't tried any form of retinol before. If this is the case, it's best to start with a super-gentle retinol serum. 

In addition, make sure you're limiting other active ingredients in your nighttime routine when using retinaldehyde. "Avoid mixing other acids, such as vitamin C or AHAs, in the same product or even in different products used at the same time," Marcus says. Don't worry: You can still use your favorite exfoliating serums, just not on the same night. (Here's a derm-approved skin-cycling routine if you need help shuffling through your actives.) You don't have to ditch your vitamin C serum either—simply use it in the morning. 

After you apply the serum, always follow up with a moisturizer. Also be sure to avoid slugging (aka, applying a highly occlusive moisturizer to the face) after using any form of retinoids, as it can increase irritation. And remember: You should be extra diligent about wearing SPF daily when using retinoids, as they can make your skin more sensitive to the sun. 

If you've hit a wall with your OTC retinol products or find that your skin can't tolerate prescription-grade products, retinaldehyde is a great middle ground. This ingredient can help increase cell turnover and prevent clogged pores, leading to smoother skin and fewer breakouts—but as with any vitamin A derivative, it's best to start slowly and increase your use of retinaldehyde as your skin tolerates it. If you're not an experienced retinol user, don't fret: There are tons of classic retinol serums to help you along the path to using stronger, more potent forms of vitamin A, if you fancy.