Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

REN Clean Skincare Radiance Glow Daily Vitamin C Gel Cream Versus Paula's Choice Resist Super Antioxidant Serum

REN Clean Skincare Radiance Glow Daily Vitamin C Gel Cream Versus Paula's Choice Resist Super Antioxidant Serum Detailed comparison of REN Clean Skincare Radiance Glow Daily Vitamin C Gel Cream versus Paula's Choice Resist Super Antioxidant Serum. This brighte

This source-based comparison does not add ratings or recommend a winner.

REN Clean Skincare Radiance Glow Daily Vitamin C Gel Cream Versus Paula's Choice Resist Super Antioxidant Serum Detailed comparison of REN Clean Skincare Radiance Glow Daily Vitamin C Gel Cream versus Paula's Choice Resist Super Antioxidant Serum. This brightening moisturizer is formulated around Ascorbyl Glucoside and Hippophae Rhamnoides Oil to brighten dull-looking skin and fade the look of dark spots. This anti-aging serum is formulated around Tetrahexyldecyl Ascorbate and Palmitoyl Tripeptide-5 to soften the look of wrinkles and brighten dull-looking skin. Water Cetearyl Ethylhexanoate Glycerin Lauryl Laurate Cetearyl Alcohol Tapioca Starch Ascorbyl Glucoside Hydroxyacetophenone Carbomer Phenoxyethanol Cetearyl Glucoside Citrus Grandis Peel Oil Glycogen Hippophae Rhamnoides Oil Citrus Aurantium Dulcis Flower Oil Parfum Tocopherol Citrus Nobilis Peel Oil Citrus Tangerina Peel Oil Magnesium Ascorbyl Phosphate Diglucosyl Gallic Acid Ammonium Bicarbonate Glucose Helianthus Annuus Seed Oil Rosmarinus Officinalis Leaf Extract Sodium Hydroxide Citral Limonene Linalool Water, Cetearyl Ethylhexanoate, Glycerin, Lauryl Laurate, Cetearyl Alcohol, Tapioca Starch, Ascorbyl Glucoside, Hydroxyacetophenone, Carbomer, Phenoxyethanol, Cetearyl Glucoside, Citrus Grandis Peel Oil, Glycogen, Hippophae Rhamnoides Oil, Citrus Aurantium Dulcis Flower Oil, Parfum, Tocopherol, Citrus Nobilis Peel Oil, Citrus Tangerina Peel Oil, Magnesium Ascorbyl Phosphate, Diglucosyl Gallic Acid, Ammonium Bicarbonate, Glucose, Helianthus Annuus Seed Oil, Rosmarinus Officinalis Leaf Extract, Sodium Hydroxide, Citral, Limonene, Linalool Cyclopentasiloxane Dimethicone Tetrahexyldecyl Ascorbate Palmitoyl Tripeptide-5 Ceramide NP Tocotrienols Ubiquinone Thioctic Acid Tocopheryl Acetate Ferulic Acid Beta-Glucan Superoxide Dismutase Epigallocatechin Gallate Ergothioneine Glutathione Xanthophylls Glycine Soja Seed Extract Arctostaphylos Uva Ursi Leaf Extract Lupinus Albus Seed Extract Curcuma Longa Root Elaeis Guineensis Oil Cyclopentasiloxane, Dimethicone, Tetrahexyldecyl Ascorbate, Palmitoyl Tripeptide-5, Ceramide NP, Tocotrienols, Tocopherol, Ubiquinone, Thioctic Acid, Tocopheryl Acetate, Magnesium Ascorbyl Phosphate, Ferulic Acid, Beta-Glucan, Superoxide Dismutase, Epigallocatechin Gallate, Ergothioneine, Glutathione, Xanthophylls, Glycine Soja Seed Extract, Glycerin, Arctostaphylos Uva Ursi Leaf Extract, Lupinus Albus Seed Extract, Curcuma Longa Root, Elaeis Guineensis Oil, Phenoxyethanol Be the first to review These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum. Topically, glycerin does several things at once: Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3. Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin. This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products. Just know very high concentrations (>40%) can feel tacky in low humidity. Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine. Magnesium Ascorbyl Phosphate (MAP) is a water-soluble form of Vitamin C. It is used in skincare because it tends to be more formulation friendly than pure vitamin C (ascorbic acid). According to research, MAP has three major benefits: While MAP is gentler on the skin than ascorbic acid, it is thought to be less easily absorbed into the skin. In a well-known absorption study, pure vitamin C increased skin vitamin C levels when formulated correctly, but derivatives like MAP did not in that experiment. This suggests MAP may not always convert into active vitamin C in the skin. Due to MAP's stability up to a pH level of 7, it is more stable to air and sunlight exposure than ascorbic acid. The best pH range for MAP is between 5 and 6. Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!). It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome. On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive. Another perk of this ingredient is that it stays functional across a wide pH range (3-10). You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own. Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU. Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages. Adverse systemic effects only showed up in animal studies at exposures roug