Kiehl's Better Screen UV Serum SPF 50+ Facial Sunscreen With Collagen Peptide Versus Boots SPF+ Niacinamide Moisturising Lotion SPF50

Kiehl's Better Screen UV Serum SPF 50+ Facial Sunscreen With Collagen Peptide Versus Boots SPF+ Niacinamide Moisturising Lotion SPF50 Detailed comparison of Kiehl's Better Screen UV Serum SPF 50+ Facial Sunscreen With Collagen Peptide versus Boots SPF+ Niacinamide Moisturising Lotion SPF50. This chemical sunscreen covers most of the UV range, lighter on the deep UVA that drives aging. This chemical sunscreen covers the full UV range and blocks ~98% of UVB at SPF 50. Butyl Methoxydibenzoylmethane 3% Homosalate 7% Ethylhexyl Salicylate 5% Octocrylene 7% Water Glycerin C15-19 Alkane Propanediol C12-22 Alkyl Acrylate/Hydroxyethylacrylate Copolymer Tocopherol Sodium Stearoyl Glutamate Butylene Glycol Cetearyl Alcohol Sclerotium Gum Hydroxyacetophenone Caprylyl Glycol Sodium Starch Octenylsuccinate Glyceryl Stearate Jojoba Esters Helianthus Annuus Seed Wax Hydroxypropyl Starch Phosphate Trisodium Ethylenediamine Disuccinate Carbomer Sodium Lactate Sodium Hydroxide Polysorbate 20 Polyglycerin-3 Palmitoyl Tripeptide-1 Palmitoyl Tetrapeptide-7 Butyl Methoxydibenzoylmethane 3%, Homosalate 7%, Ethylhexyl Salicylate 5%, Octocrylene 7%, Water, Glycerin, C15-19 Alkane, Propanediol, C12-22 Alkyl Acrylate/Hydroxyethylacrylate Copolymer, Tocopherol, Sodium Stearoyl Glutamate, Butylene Glycol, Cetearyl Alcohol, Sclerotium Gum, Hydroxyacetophenone, Caprylyl Glycol, Sodium Starch Octenylsuccinate, Glyceryl Stearate, Jojoba Esters, Helianthus Annuus Seed Wax, Hydroxypropyl Starch Phosphate, Trisodium Ethylenediamine Disuccinate, Carbomer, Sodium Lactate, Sodium Hydroxide, Polysorbate 20, Polyglycerin-3, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7 Octocrylene Dibutyl Adipate Butyl Methoxydibenzoylmethane Ethylhexyl Salicylate Phenylbenzimidazole Sulfonic Acid Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine Coco-Caprylate/Caprate Aminomethyl Propanol Cellulose Niacinamide Panthenol Silica Tocopheryl Acetate Acrylates/C10-30 Alkyl Acrylate Crosspolymer Caprylhydroxamic Acid Xanthan Gum Disodium EDTA Water, Octocrylene, Dibutyl Adipate, Propanediol, Butyl Methoxydibenzoylmethane, Ethylhexyl Salicylate, Phenylbenzimidazole Sulfonic Acid, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Cetearyl Alcohol, Coco-Caprylate/Caprate, Aminomethyl Propanol, Cellulose, Caprylyl Glycol, Sodium Stearoyl Glutamate, Niacinamide, Panthenol, Silica, Tocopheryl Acetate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Caprylhydroxamic Acid, Glycerin, Xanthan Gum, Disodium EDTA 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. Also known as Avobenzone, this ingredient is an oil-soluble used to absorb the full spectrum of UVA rays (peak 357 nm). It's one of the most effective UVA filters available but has a major caveat of photostability: avobenzone is susceptible to photodegradation. This means it can lose efficacy when exposed to sunlight without the help of a stabilizing agent. Studies show antioxidants (like vitamin E or vitamin C) and some UV filters (like octocrylene and Tinosorb S) can meaningfully improve its stability in a formulation. The maximum allowable concentration according to regulation is 3% in the US + Canada, and 5% in the EU, Australia, China, Korea, and ASEAN countries. It has a well-support safety profile: a comprehensive 2025 review found minimal toxicity with no evidence of carcinogenicity. Overall, avobenzone is a safe and regulated ingredient used in sunscreen for over 40 years. Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created. Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin. Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on). Cetearyl alcohol is a waxy mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is an emollient and emulsifier. Despite having "alcohol" in its name, it has nothing to do with drying solvent alcohols; the FDA also allows "alcohol-free" products to contain fatty alcohols like this ingredient. It plays several roles in a formula: Typical use levels for this ingredient sit around 1-10% and the Cosmetic Ingredient Review Expert Panel has affirmed safety at concentrations up to 25% in leave-on products. Multiple assessments have found it to be non-irritating and non-sensitizing to most people. However, there have been some cases of allergic contact dermatitis in patients with chronically compromised skin barriers. Cetearyl alcohol has a comedogenic rating of 2 and irritancy rating of 1. Both of these numbers come from the 1989 study that used rabbit ears; a "2" means mildly comedogenic and a "1" means low irritancy. Here's the catch: rabbit skin is more sensitive than human skin and throws a lot of false positives. A 1996 reappraisal found that ingredients rated 1-2 in the rabbit ear tests are generally safe for humans. Remember comedogenic ratings are unable to assess the entire formula of a product or how it will react on your skin. Just be sure to patch test if you are unsure about certain ingredients. This ingredient is not fungal acne safe. Cetearyl alcohol is a fatty alcohol with chain lengths that fall within the range that Malassezia can metabolize. A 2019 study has also observed Malassezia growth in the presence of this ingredient, confirming it to be not-fungal acn