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What Is An Active Ingredient

Updated: Mar 3, 2021

Using products that contain active ingredients can be the difference between achieving your skin goals and falling short. But what ingredients are actually classified as active? I explain below.

The term “active ingredient” is thrown around a lot in the skin care sphere but, in many cases, it isn’t being used correctly. Considering just how much there is to know about skin care products, formulations, and ingredients at large, I wanted to take the time to outline what active ingredients are, how to determine whether a product contains an active ingredient, and why inactive ingredients still matter.

What Is an Active Ingredient?

Simply put, the term “active ingredient” refers to a chemical that actively targets a specific skin concern — such as acne, pigmentation, or fine lines — and creates a physical change in your skin.

These ingredients have scientific data showing their efficacy so there is a good chance you’ll benefit from including them in your skin care regimen. This makes sense because otherwise we wouldn’t have concrete proof an ingredient caused a physical changes in the skin. 

In the US, active ingredients are regulated by the U.S. Food and Drug Administration (FDA) and are technically considered “drugs.” We recognize that not all countries abide by the same rule set, which means the definition of an active ingredient varies across the board. That’s partly why the term has become so confusing, and why it’s been adapted colloquially to mean any ingredient that has a notable effect on the skin.


A List of Common Skin Care Actives

The most common active ingredients found in skin care are as follows: 

  • Zinc Oxide (found in sunscreen): This is one of the best sunblock ingredients available because it blocks 100% of UVB rays and 90% of UVA. Some of the better products are micronized so they rub in completely into the skin and can be a cosmetically elegant option even for skin of colour. 

  • Avobenzone (found in sunscreen):  another prized ingredient found in sunscreen that blocks both UVB and UVA rays. 

  • Salicylic Acid (BHA) — A strong exfoliating acid that causes the skin to shed and peel to reveal brighter, clearer, smoother skin. It’s one of the most common acne-fighting ingredient! Salicylic Acid can come in many strengths.

  • Benzoyl Peroxide — This active ingredient is great at killing bacteria and decreasing oil production, leading to improvement in acne as well as whiteheads and blackheads.

  • Retinoids (vitamin A) — This anti-aging, exfoliating antioxidant helps stimulates collagen production and helps with fine lines, reduce pore size, acne, and pigmentation. With consistent use, it can make skin softer, smoother, and clearer.

  • Vitamin C — An antioxidant superhero that wards off free radical damage. It helps exfoliate the skin, improving tone and texture and it also helps with pigmentation. It also stimulates collagen production and helps improve fine lines. Aim for 10% or higher concentration. 

  • Glycolic Acid — One of the most common alpha hydroxy acids (AHAs). In addition to exfoliating the skin to improve texture and tone, it can also foster collagen production. It’s commonly used to treat hyperpigmentation and acne.

Note that the above isn’t a comprehensive list of all active ingredients that follow the FDA’s definition.

How to Identify Actives on a Product Label


Typically, active ingredients will be the first one to five ingredients that are listed first on the product label. They’re usually listed in decreasing order of importance and/or concentration, and the ingredient should produce an effect when used. Regarding marketing, many products over-promise and under-deliver. The product label may look promising, but if the actives aren’t the first few ingredients then they’re not likely to do much.

Concentration is big issue, and that without enough of the active ingredient, you’re not likely to see much improvement. On that note, the FDA actually stipulates that active products have their active ingredients clearly labeled on the packaging along with its quantity, kind, and proportion of any alcohol.

Why Inactive Ingredients Still Matter

The bottom line is that inactive ingredients matter because formulation matters. In terms of inactive ingredients found in a product along with active ingredients, they should play a supporting role in the efficacy of the active ingredient. 

How a product is formulated can impact how well the active ingredient is absorbed into your skin, how potent in remains over time, and how your skin reacts. For example, a poorly formulated vitamin C product can degrade in a matter of weeks, and a poorly formulated retinoid can leave your skin especially raw and sensitive. 

Additionally, products formulated solely with inactive ingredients are wonderful and necessary complements to the active products in your regimen. They generally help nourish, hydrate, plump, soothe, and restore. 


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