Reference
Skincare ingredients glossary
A plain-English guide to the actives you see on skincare labels — what each one does, who it suits, and how to use it. Not medical advice; introduce new actives one at a time, and treat persistent burning, rash, acne scarring, or changing spots as a reason to see a dermatologist rather than another shopping problem.[1]
Product examples are drawn from our catalog; qualifying Amazon purchases may earn us a commission. They are examples, not a substitute for choosing by your skin and tolerance.
Niacinamide
A form of vitamin B3 used in products for oiliness, uneven tone, and barrier support. It is usually well tolerated, but it is not an instant pore eraser; judge it over weeks and pair it with sunscreen when tone is the target.[2]
Product example: The Ordinary Niacinamide 10% + Zinc 1% ↗
Retinol & retinoids
Vitamin A derivatives used for acne, texture, fine lines, and photoaging. They are commonly introduced at night and gradually; sun protection matters while using them. Avoid retinoids during pregnancy unless your clinician specifically clears them.[3][4]
Product example: CeraVe Skin Renewing Retinol Serum ↗
Salicylic acid (BHA)
An oil-soluble beta hydroxy acid used for clogged pores, blackheads, and oily or acne-prone skin. Because it can be drying, it works best as one part of a routine that still includes moisturizer. Do not stack it immediately with every other acne active when your skin is new to treatment.[5]
Product example: Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant ↗
Hyaluronic acid (HA)
A humectant that binds water for lightweight hydration and a plumper look. Apply it to slightly damp skin, then seal with moisturizer, especially in dry weather. Hyaluronic acid can help with dehydration but does not replace the barrier support very dry skin may need.[6]
Vitamin C
An antioxidant used for dullness, uneven tone, and photoprotection support. It is commonly used in the morning under sunscreen, but it can sting sensitive skin, especially in low-pH ascorbic acid formulas. If vitamin C irritates you, a simpler routine is often more useful than forcing it.[7][8]
Product example: The Ordinary Ascorbyl Glucoside Solution 12% ↗
Benzoyl peroxide
An acne active that reduces acne-causing bacteria. It can help with inflamed breakouts, but it can also dry skin and bleach towels, pillowcases, or clothing. Introduce it slowly and keep moisturizer in the routine.[5][9]
Product example: PanOxyl 10% Benzoyl Peroxide Acne Foaming Wash ↗
AHAs (glycolic, lactic acid)
Water-soluble alpha hydroxy acids that exfoliate the surface to smooth texture and brighten dull skin. Overuse can cause stinging, flaking, and barrier trouble. Use sunscreen consistently when exfoliating, and avoid strong acids on irritated skin.
Product example: AmLactin Daily Nourish Body Lotion 12% Lactic Acid ↗
Ceramides
Lipids that are part of the skin barrier. Moisturizers with ceramides can be useful when the routine is trying to reduce dryness, sensitivity, or active-related irritation.[10]
Product example: CeraVe Moisturizing Cream ↗
Broad-spectrum SPF
Sunscreen that protects against both UVA and UVB. For daily skincare, look for broad-spectrum SPF 30 or higher, apply enough, and reapply during extended outdoor exposure. Sun protection is an important part of routines for photoaging and hyperpigmentation.[11][12]
Product example: EltaMD UV Clear Face Sunscreen SPF 46 ↗
Azelaic acid
A multi-tasking ingredient used for acne, redness-prone skin, and post-inflammatory hyperpigmentation. It can be a useful option when someone wants tone support without the same irritation profile as stronger acids, though tingling and dryness can still happen.[13]
Petrolatum
An occlusive ingredient that helps reduce water loss. It can be useful for very dry patches, lips, and compromised barriers; acne-prone users may prefer using it only on dry areas rather than across the whole face.[1]
Product example: Aquaphor Healing Ointment Advanced Therapy ↗
Fragrance-free
A label that can matter for dry, sensitive, eczema-prone, or allergy-prone skin. “Unscented” is not always the same thing; a product can smell neutral because masking fragrance was added. If products sting or rashes repeat, fragrance-free basics and patch testing are better than guessing.[14][1]
Product example: Vanicream Gentle Facial Cleanser ↗
Mineral sunscreen
Sunscreen that uses mineral UV filters such as zinc oxide or titanium dioxide. Mineral formulas are often suggested for sensitive skin, but any sunscreen that is broad-spectrum, SPF 30 or higher, and comfortable enough to use consistently can be an effective choice.[15]
Product example: CeraVe Hydrating Mineral Sunscreen SPF 30 Face Sheer Tint ↗
Explore the next step
Understand the ingredient
- Salicylic Acid for Oily, Acne-Prone Skin
When salicylic acid helps clogged pores, how to choose a cleanser or leave-on format, where it fits in a routine and when a gentle alternative makes sense.
- Niacinamide for Oily Skin: Is a Serum Worth It?
Understand niacinamide’s oil-control evidence, concentration limits, cleanser versus serum formats and how to use it without duplicating your routine.
- Retinol for Beginners: Choose, Start & Adjust
A beginner’s guide to cosmetic retinol: how it differs from acne retinoids, what to check on the label, nighttime use, moisturizer and irritation signs.
- Azelaic Acid for Dark Spots & Redness: The Limits
How azelaic acid relates to post-acne discoloration and some redness concerns, cosmetic versus prescription formulas, routine placement and irritation risks.
- Hyaluronic Acid for Dehydrated Skin: Serum or Cream?
Learn what a hyaluronic-acid serum adds, why moisturizer still matters, how to layer it and when an oily or dry face can skip the extra step.
Place it in your routine
- Retinol Before or After Moisturizer? Both Can Work
Use retinol before moisturizer when directed, or consider moisturizer first for buffering. Learn the exceptions, dry-skin guidance and irritation signs.
- Vitamin C Before or After Moisturizer? Check the Format
Most watery vitamin C serums go before moisturizer. Learn how oil-based formulas and creams differ, where SPF fits and what to do about pilling or stinging.
- Sunscreen Before or After Moisturizer? Apply SPF Last
Apply a separate sunscreen after moisturizer and before makeup. Understand mineral and chemical SPF, combined moisturizers, pilling and reapplication.
References
- American Academy of Dermatology. “How to test skin care products.” aad.org. View source ↗
- Bissett DL, et al. “Niacinamide: a B vitamin that improves aging facial skin appearance.” Dermatologic Surgery. 2005. View source ↗
- Mukherjee S, et al. “Retinoids in the treatment of skin aging: an overview of clinical efficacy and safety.” Clinical Interventions in Aging. 2006. View source ↗
- DermNet. “Topical retinoids.” dermnetnz.org. View source ↗
- American Academy of Dermatology. “Acne: Diagnosis and treatment.” aad.org. View source ↗
- Papakonstantinou E, et al. “Hyaluronic acid: A key molecule in skin aging.” Dermato-endocrinology. 2012. View source ↗
- Pullar JM, Carr AC, Vissers MCM. “The roles of vitamin C in skin health.” Nutrients. 2017. View source ↗
- Telang PS. “Vitamin C in dermatology.” Indian Dermatology Online Journal. 2013. View source ↗
- American Academy of Dermatology. “Guidelines of care for the management of acne vulgaris.” Journal of the American Academy of Dermatology. 2024. View source ↗
- Coderch L, et al. “Ceramides and skin function.” American Journal of Clinical Dermatology. 2003. View source ↗
- American Academy of Dermatology. “How to decode sunscreen labels.” aad.org. View source ↗
- U.S. Food and Drug Administration. “Sunscreen: How to help protect your skin from the sun.” fda.gov. View source ↗
- DermNet. “Azelaic acid.” dermnetnz.org. View source ↗
- American Academy of Dermatology. “Dermatologists’ top tips for relieving dry skin.” aad.org. View source ↗
- American Academy of Dermatology. “Sunscreen FAQs.” aad.org. View source ↗
Sources are dermatology organizations and peer-reviewed research. Find My Skin Routine is informational and is not a substitute for personalized advice from a board-certified dermatologist.