What does retinol serum do for your face

Here are answers to commonly asked questions regarding retinol and retinoids.

What Are Retinoids Used For? 

Retinoids are used for promoting healthy, younger-looking skin. Studies have shown the ingredient can reduce the appearance of wrinkles and clear up breakouts.

Is Retinol a Retinoid? 

Yes, retinol is a type of retinoid. According to Saedi, retinols are a weaker version of retinoids. Retinols are available over the counter, while retinoids typically require a prescription.

Is Retinoid Better Than Retinol?

It depends on what you’re looking for. In terms of strength, retinoids win. They’re more potent than retinols, which are generally available over the counter. But since they are more potent, there’s also a greater risk of negative side effects.

What Is the Best Retinol Product?

Consider product strength, type, and ingredients when choosing the product for you. Shah warns to watch out for ingredients that sound like retinol, such as “pro-retinols” or “retinyl propionate.” They’re not as effective, he says. Choose a gel if you have acne-prone skin (the drying quality reduces breakouts) or a cream for normal or dry skin, Shah says. Most over-the-counter products offer retinol in the following concentrations: 1, 0.5, 0.3, and 0.25 percent. Start out with a low concentration to see how your skin reacts, Saedi says.

Do Retinoids Really Work?

Yes, research shows they’re effective at clearing up breakouts and reducing the appearance of wrinkles, according to the American Academy of Dermatology and the aforementioned study published in the Journal of Cosmetic Dermatology.

What Are Examples of Retinoids?

Tretinoin, retinyl palmitate, retinaldehyde, isotretinoin, and tazarotene are examples of retinoids, according to UW Health.

Is Salicylic Acid a Retinoid?

No. Salicylic acid is another popular skin-care ingredient that fights acne, but it’s not a retinoid, according to MedlinePlus.

What Is the Strongest Retinoid?

Isotretinoin is the strongest retinoid, and it's generally used to treat severe acne, according to UW Health.

Are There Side Effects to Retinol?

Yes. Retinol can result in redness, burning, and scaling, according to the Journal of Cosmetic Dermatology study. That’s why most dermatologists recommend starting slow and then ramping up to daily use once the skin becomes used to it.

Can You Put Moisturizer on Over Retinol?

Yes, but you may not need to. Most retinol products have moisturizer built in, which helps minimize the risk of a negative reaction, according to Saedi.

Can You Put Moisturizer on Under Retinol?

Yes, you can put moisturizer on your skin before applying retinol. Shah says this will minimize irritating effects and won’t interfere with retinol absorption.

Are Retinols and Retinoids Safe to Use During Pregnancy?

It’s not recommended. There’s a possibility that retinol and retinoid use can increase the risk of birth defects. The study in Canadian Family Physician mentioned above recommended more research involving larger sample sizes, but most doctors say it’s best for pregnant women to avoid the ingredient during those nine months.

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One Last Thing About Adding a Retinoid or Retinol to Your Skin-Care Routine

Retinols and retinoids can effectively help the skin fight acne and signs of aging. “They're great to use. We have so much science behind them, and there's a formulation that works for everyone,” Saedi says.

Retinoids are stronger than retinols and are available by prescription only, whereas retinols can be purchased at a drugstore. Both versions produce results — it just takes a bit longer to notice the changes with a low-potency retinol.

“The bottom line is that retinoids in the form of a nonprescription will be less irritating than retinoids in a prescription form until someone builds up a tolerance to the ingredient,” Solomon says.

• The benefits of retinol for your skin include fighting acne and reducing wrinkles and dark spots.
• Retinol helps reduce the appearance of acne by increasing cell turnover and decreasing oil.
• It also boosts blood flow to the skin, which increases the production of collagen.

Retinol is a form of vitamin A that is commonly used to treat acne and reduce wrinkles. It is one of the many types of retinoids — an umbrella term used for all vitamin A derivatives. 

Retinoids come in a variety of strengths and are known by different names, but Retinol is the most common type. Retinol is weaker than most retinoids and usually added to over-the-counter products. These are readily accessible and don't need a prescription for use, unlike more potent forms of retinoids. 

Here's what you need to know about how retinol works and the benefits it can have for your skin. 

How does retinol work? 

Retinol works by triggering the skin cells of the outermost layer of the skin to turnover faster so that new skin cells can generate. This results in smoother and more even-looking skin. 

It increases the production of natural chemicals like hyaluronic acid in the skin. These chemicals help to keep the skin moist and plump. Retinol also boosts collagen production and prevents the breakdown of collagen that already exists. 

"Retinol doesn't become biologically active until it is transformed into retinoic acid once it's inside the skin," says Suzanne Friedler, MD, a board-certified dermatologist who is a clinical Instructor at Mount. Sinai Medical Center and on the dermatology faculty at St. John's Episcopal Medical Center. 

1. Improves the appearance of acne

According to research published in the Journal of Clinical Dermatology and Therapy, clinical data from thousands of people shows that retinol is highly effective in treating both inflammatory and non-inflammatory acne. It was proven to reduce the visibility of pimples on the skin and also stop the development of new pimples and acne blemishes.

One way retinol can improve the appearance of acne is by encouraging cell turnover, says Lindsey Bordone, MD a Dermatologist at Columbia Doctors and Assistant Professor of Dermatology at Columbia University Irving Medical Center. Acne develops when a combination of dead skin cells and oil collects inside hair follicles on your face. With retinol, those cells are shed and replaced more quickly. 

"It also decreases oil production in these cells by binding to the specific receptors for retinol within the cells of the skin," says Bordone. Decreased oil production prevents oil from blocking your pores and helps to prevent acne.

"To make sure you clear up your acne and keep it clear, we usually recommend three months of use to get to your optimal results," says Bordone. 

2. Is an anti-aging treatment 

Retinol works as an anti-aging treatment in three major ways. It reduces the appearance of fine lines and wrinkles, helps with sun damage, and gets rid of dark spots. 

Collagen is a protein made by our body that keeps our skin looking smooth. Wrinkles and fine lines are caused by a decrease in collagen production. Retinol works to reduce the appearance of these fine lines and wrinkles by boosting blood flow to the skin, which increases the production of collagen. This helps to improve the appearance of wrinkles, by thickening the inner layer of the skin. 

It helps with sun damage and dark spots by encouraging skin cell turnover, allowing you to shed discolored skin cells. But retinol also makes you more susceptible to sun damage. This is why retinol products should only be used at night, alongside a broad-spectrum sunscreen each morning, even when you are indoors. 

A 2000 study, published in the Journal of Investigative Dermatology, studied the effect of applying retinol on aged skin in 53 participants who were aged 80 or above. Researchers observed that retinol application for 7 days, led to a reduction in the breakdown of collagen and an increase in collagen production. They concluded that this showed that retinol should be effective as an anti-aging treatment.

If you are using retinol for its anti-aging properties, continuous use is encouraged. "With anti-aging, retinol use should be a continual process, because you are constantly trying to turn back the hands of time. It can help with sunspots, fine lines, and wrinkles, but it's something you want to continue using for years, to stay on top of an anti-aging regime," says Bordone. It might take three to six months of regular use to see an improvement in wrinkles. 

3. Brightens dull skin 

Retinol also helps to brighten dull skin. Dull skin can be caused by several things including pregnancy, stress, sun damage, poor lifestyle habits like smoking and drinking alcohol in excess, or environmental pollution. 

Retinol works by calming down the skin cells that produce melanin, a dark pigment. These cells are responsible for skin conditions like melasma, which causes discoloration of the skin. Retinol causes the skin cells to turn over, so the skin becomes healthier and looks brighter.

A 2016 study published in the Journal of Drugs in Dermatology studied the effect of a product which contained 0.5% retinol on 25 people with mild to moderate hyperpigmentation. By week 4 participants showed an improvement in their hyperpigmentation. Researchers determined that the product worked well for skin brightening, especially when used with a complimentary skincare routine that includes sunscreen. 

While mild flaking and redness occurred early in the study, by week 10, participants reported no stinging, itching, dryness, or tingling.

Insider's takeaway

Retinol has many skincare benefits. However, it can be drying and irritating for people with sensitive skin. If this is you, start with a product that has a low concentration of retinol, and use it once or twice a week. As your skin grows more tolerant, you can up the frequency at which you use and try out products with a higher concentration of retinol. 

Toketemu Ohwovoriole is a freelance writer for Insider. 

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