Ishizawa Labs Shigaisen Yohou Moisturizing UV Serum SPF 50+ Versus Paula's Choice Resist Youth-Extending Daily Hydrating Fluid SPF 50
Updated on July 14, 2025
Overview
What they are
These products are both fungal acne (malassezia) safe sunscreens. They have a total of 4 ingredients in common
Cool Features
They both contain exfoliants, SPF and Vitamin E
Suited For
They're both likely to be good for anti aging, dry skin, sensitive skin, reducing pores and scar healing
Free From
They both do not contain any parabens or sulfates
What's Inside
They both contain fragrances
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Ishizawa Labs Shigaisen Yohou Moisturizing UV Serum SPF 50+ 28 ingredients
Paula's Choice Resist Youth-Extending Daily Hydrating Fluid SPF 50 29 ingredients
What's inside
What's inside
At a glance
Click on any of the items below to learn more
Ishizawa Labs Shigaisen Yohou Moisturizing UV Serum SPF 50+ 28 ingredients
Paula's Choice Resist Youth-Extending Daily Hydrating Fluid SPF 50 29 ingredients
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningEthylhexyl Methoxycinnamate
UV Absorber
Butylene Glycol
Humectant
Diethylamino Hydroxybenzoyl Hexyl Benzoate
UV Filter
Pentylene Glycol
Skin Conditioning3-O-Ethyl Ascorbic Acid
Skin Conditioning
Ceramide AP
Skin Conditioning
Ceramide 2
Skin Conditioning
Ceramide 3
Skin Conditioning
Arbutin
Antioxidant
Hydrolyzed Grape Fruit Extract
HumectantSalvia Officinalis Extract
Antimicrobial
Sodium Acetylated Hyaluronate
Humectant
Scutellaria Baicalensis Root Extract
AstringentRhus Glabra Bark/Berry/Root Extract
AntiseborrhoeicAnthemis Nobilis Flower Extract
Masking
Malpighia Emarginata Fruit Extract
Skin ConditioningHydrolyzed Collagen
Emollient
Aloe Barbadensis Leaf Extract
Emollient
Citrus Aurantium Dulcis Peel Oil
Masking
Caprylic/Capric Triglyceride
Masking
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingHydrogenated Poly(C6-20 Olefin)
Abrasive
Sodium Hydroxide
BufferingTocopherol
Antioxidant
Disodium EDTA
Hdi/Trimethylol Hexyllactone Crosspolymer
Phenoxyethanol
Preservative
Water, Ethylhexyl Methoxycinnamate, Butylene Glycol, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Pentylene Glycol, 3-O-Ethyl Ascorbic Acid, Ceramide AP, Ceramide 2, Ceramide 3, Arbutin, Hydrolyzed Grape Fruit Extract, Salvia Officinalis Extract, Sodium Acetylated Hyaluronate, Scutellaria Baicalensis Root Extract, Rhus Glabra Bark/Berry/Root Extract, Anthemis Nobilis Flower Extract, Malpighia Emarginata Fruit Extract, Hydrolyzed Collagen, Aloe Barbadensis Leaf Extract, Citrus Aurantium Dulcis Peel Oil, Caprylic/Capric Triglyceride, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Hydrogenated Poly(C6-20 Olefin), Sodium Hydroxide, Tocopherol, Disodium EDTA, Hdi/Trimethylol Hexyllactone Crosspolymer, Phenoxyethanol
Butyl Methoxydibenzoylmethane 2%
UV Absorber
Ethylhexyl Methoxycinnamate 7.5%
UV Absorber
Ethylhexyl Salicylate 5%
UV Absorber
Octocrylene 2%
UV Absorber
Water
Skin ConditioningGlycerin
Humectant
Silica
Abrasive
Dimethicone
Emollient
Tocopherol
Antioxidant
Chamomilla Recutita Flower Extract
Masking
Vitis Vinifera Seed Extract
Antimicrobial
Camellia Sinensis Leaf Extract
Antimicrobial
Camellia Oleifera Leaf Extract
AstringentPeucedanum Graveolens Extract
TonicSambucus Nigra Fruit Extract
AstringentAvena Sativa Bran Extract
Abrasive
Punica Granatum Extract
AstringentLycium Barbarum Fruit Extract
Astringent
Hydrogenated Lecithin
Emulsifying
Titanium Dioxide
Cosmetic Colorant
Dimethicone/Vinyl Dimethicone Crosspolymer
Skin Conditioning
Diethylhexyl Syringylidenemalonate
Skin ProtectingHydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Emulsion StabilisingXanthan Gum
EmulsifyingSodium Carbomer
Emulsion StabilisingBenzyl Alcohol
Perfuming
Sodium Benzoate
Masking
Potassium Sorbate
Preservative
Phenoxyethanol
Preservative
Butyl Methoxydibenzoylmethane 2%, Ethylhexyl Methoxycinnamate 7.5%, Ethylhexyl Salicylate 5%, Octocrylene 2%, Water, Glycerin, Silica, Dimethicone, Tocopherol, Chamomilla Recutita Flower Extract, Vitis Vinifera Seed Extract, Camellia Sinensis Leaf Extract, Camellia Oleifera Leaf Extract, Peucedanum Graveolens Extract, Sambucus Nigra Fruit Extract, Avena Sativa Bran Extract, Punica Granatum Extract, Lycium Barbarum Fruit Extract, Hydrogenated Lecithin, Titanium Dioxide, Dimethicone/Vinyl Dimethicone Crosspolymer, Diethylhexyl Syringylidenemalonate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Xanthan Gum, Sodium Carbomer, Benzyl Alcohol, Sodium Benzoate, Potassium Sorbate, Phenoxyethanol
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Ethylhexyl Methoxycinnamate is an organic compound that provides UVB protection. It often goes by the more common name of octinoxate. It is created from methoxycinnamic acid and 2-ethylhexanol.
Ethylhexyl Methoxycinnamate absorbs UVB rays with wavelengths between 280-320 nm. UV absorbers protect your skin by using chemical reactions to convert UV rays into heat and energy.
UVB (290-320 nm) rays emit more energy than UVA rays. They are capable of damaging DNA, causing sunburns and are thought to be linked to skin cancer.
The state of Hawaii has banned sunscreens containing octinoxate due to its potential impact on coral reefs. More research is needed to bridge gaps in this research. The European Union allows higher levels of octinoxate in sunscreens than the US and Australia.
Ethylhexyl Methoxycinnamate is oil soluble. It is not stable and may lose efficacy when exposed to sunlight.
Learn more about Ethylhexyl MethoxycinnamatePhenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.
It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.
Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.
Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.
Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.
You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.
There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.
Learn more about TocopherolWater. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Ishizawa Labs Shigaisen Yohou Moisturizing UV Serum SPF 50+ 28 ingredients
Paula's Choice Resist Youth-Extending Daily Hydrating Fluid SPF 50 29 ingredients
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Ishizawa Labs Shigaisen Yohou Moisturizing UV Serum SPF 50+ 28 ingredients
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