Guides
Short, sourced answers to the questions people search most.
How often
- Can I use Retinol every day?
- Can I use Tretinoin every day?
- Can I use Adapalene every day?
- Can I use Vitamin C every day?
- Can I use Niacinamide every day?
- Can I use Glycolic Acid every day?
- Can I use Lactic Acid every day?
- Can I use Salicylic Acid every day?
- Can I use Benzoyl Peroxide every day?
- Can I use Azelaic Acid every day?
- Can I use Hyaluronic Acid every day?
- Can I use Ceramides every day?
- Can I use Peptides every day?
- Can I use Copper Peptides every day?
- Can I use Bakuchiol every day?
- Can I use Vitamin E every day?
- Can I use Ferulic Acid every day?
- Can I use AHA/BHA Peel every day?
- Can I use Sunscreen every day?
How to layer
- How to layer Retinol
- How to layer Tretinoin
- How to layer Adapalene
- How to layer Vitamin C
- How to layer Niacinamide
- How to layer Glycolic Acid
- How to layer Lactic Acid
- How to layer Salicylic Acid
- How to layer Benzoyl Peroxide
- How to layer Azelaic Acid
- How to layer Hyaluronic Acid
- How to layer Ceramides
- How to layer Peptides
- How to layer Copper Peptides
- How to layer Bakuchiol
- How to layer Vitamin E
- How to layer Ferulic Acid
- How to layer AHA/BHA Peel
- How to layer Sunscreen
With makeup
- Can you use Retinol under makeup?
- Can you use Tretinoin under makeup?
- Can you use Adapalene under makeup?
- Can you use Vitamin C under makeup?
- Can you use Niacinamide under makeup?
- Can you use Glycolic Acid under makeup?
- Can you use Lactic Acid under makeup?
- Can you use Salicylic Acid under makeup?
- Can you use Benzoyl Peroxide under makeup?
- Can you use Azelaic Acid under makeup?
- Can you use Hyaluronic Acid under makeup?
- Can you use Ceramides under makeup?
- Can you use Peptides under makeup?
- Can you use Copper Peptides under makeup?
- Can you use Bakuchiol under makeup?
- Can you use Vitamin E under makeup?
- Can you use Ferulic Acid under makeup?
- Can you use AHA/BHA Peel under makeup?
- Can you use Sunscreen under makeup?
Pregnancy
- Can you use Retinol while pregnant or breastfeeding?
- Can you use Tretinoin while pregnant or breastfeeding?
- Can you use Adapalene while pregnant or breastfeeding?
- Can you use Vitamin C while pregnant or breastfeeding?
- Can you use Niacinamide while pregnant or breastfeeding?
- Can you use Glycolic Acid while pregnant or breastfeeding?
- Can you use Lactic Acid while pregnant or breastfeeding?
- Can you use Salicylic Acid while pregnant or breastfeeding?
- Can you use Benzoyl Peroxide while pregnant or breastfeeding?
- Can you use Azelaic Acid while pregnant or breastfeeding?
- Can you use Hyaluronic Acid while pregnant or breastfeeding?
- Can you use Ceramides while pregnant or breastfeeding?
- Can you use Peptides while pregnant or breastfeeding?
- Can you use Copper Peptides while pregnant or breastfeeding?
- Can you use Bakuchiol while pregnant or breastfeeding?
- Can you use Vitamin E while pregnant or breastfeeding?
- Can you use Ferulic Acid while pregnant or breastfeeding?
- Can you use AHA/BHA Peel while pregnant or breastfeeding?
- Can you use Sunscreen while pregnant or breastfeeding?
Wait times
- How long should you wait between Retinol and Vitamin C?
- How long should you wait between Retinol and Niacinamide?
- How long should you wait between Vitamin C and Niacinamide?
- How long should you wait between Retinol and Tretinoin?
- How long should you wait between Retinol and Salicylic Acid?
- How long should you wait between Retinol and Hyaluronic Acid?
- How long should you wait between Tretinoin and Vitamin C?
- How long should you wait between Tretinoin and Niacinamide?
- How long should you wait between Vitamin C and Salicylic Acid?
- How long should you wait between Vitamin C and Hyaluronic Acid?
- How long should you wait between Niacinamide and Salicylic Acid?
- How long should you wait between Niacinamide and Hyaluronic Acid?
- How long should you wait between Retinol and Glycolic Acid?
- How long should you wait between Retinol and Benzoyl Peroxide?
- How long should you wait between Retinol and Sunscreen?
- How long should you wait between Tretinoin and Salicylic Acid?
- How long should you wait between Tretinoin and Hyaluronic Acid?
- How long should you wait between Vitamin C and Glycolic Acid?
- How long should you wait between Vitamin C and Benzoyl Peroxide?
- How long should you wait between Vitamin C and Sunscreen?
- How long should you wait between Niacinamide and Glycolic Acid?
- How long should you wait between Niacinamide and Benzoyl Peroxide?
- How long should you wait between Niacinamide and Sunscreen?
- How long should you wait between Salicylic Acid and Hyaluronic Acid?
- How long should you wait between Retinol and Adapalene?
- How long should you wait between Retinol and Azelaic Acid?
- How long should you wait between Tretinoin and Glycolic Acid?
- How long should you wait between Tretinoin and Benzoyl Peroxide?
- How long should you wait between Tretinoin and Sunscreen?
- How long should you wait between Adapalene and Vitamin C?
- How long should you wait between Adapalene and Niacinamide?
- How long should you wait between Vitamin C and Azelaic Acid?
- How long should you wait between Niacinamide and Azelaic Acid?
- How long should you wait between Glycolic Acid and Salicylic Acid?
- How long should you wait between Glycolic Acid and Hyaluronic Acid?
- How long should you wait between Salicylic Acid and Benzoyl Peroxide?
- How long should you wait between Salicylic Acid and Sunscreen?
- How long should you wait between Benzoyl Peroxide and Hyaluronic Acid?
- How long should you wait between Hyaluronic Acid and Sunscreen?
- How long should you wait between Retinol and Lactic Acid?
Product layering
- How to layer The Ordinary Niacinamide 10% + Zinc 1%
- How to layer The Ordinary Retinol 0.5% in Squalane
- How to layer CeraVe Resurfacing Retinol Serum
- How to layer The Ordinary Retinol 1% in Squalane
- How to layer Differin Adapalene Gel 0.1%
- How to layer Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant
- How to layer SkinCeuticals C E Ferulic
- How to layer PanOxyl Acne Creamy Wash 4% Benzoyl Peroxide
- How to layer The Ordinary Ascorbic Acid 8% + Alpha Arbutin 2%
- How to layer The Ordinary Glycolic Acid 7% Exfoliating Toner
- How to layer The Ordinary AHA 30% + BHA 2% Peeling Solution
- How to layer The Ordinary Azelaic Acid Suspension 10%
- How to layer The Ordinary Vitamin C Suspension 23% + HA Spheres 2%
- How to layer CeraVe SA Smoothing Cleanser
- How to layer Drunk Elephant T.L.C. Framboos Glycolic Night Serum
- How to layer The Inkey List Retinol Serum
- How to layer The Ordinary Multi-Peptide + Copper Peptides 1% Serum
- How to layer The Ordinary Hyaluronic Acid 2% + B5
- How to layer The Ordinary Buffet
- How to layer The Ordinary Granactive Retinoid 2% Emulsion