Shigaisen Yohou Moisturizing UV Serum SPF 50+
The Ishizawa Labs Shigaisen Yohou Moisturizing UV Serum SPF 50+ is a sunscreen. Our analysis of its 28 ingredients (16 low-risk) rates it Excellent (97/100). Based on its ingredients, it looks well-suited to oily / acne-prone, dry, and sensitive skin.
The Ishizawa Labs Shigaisen Yohou Moisturizing UV Serum SPF 50+ is a sunscreen. Our analysis of its 28 ingredients (16 low-risk) rates it Excellent (97/100). Based on its ingredients, it looks well-suited to oily / acne-prone, dry, and sensitive skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
Dry Skin
6/2
Oily/Acne-Prone Skin
1/0
Sensitive Skin
4/4
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
1
|
|
Water
(Solvent) |
|
6
|
|
Ethylhexyl Methoxycinnamate
(Uv Absorber, Uv Filter) |
Bad for Oily Skin
Bad for Sensitive Skin
|
|
1
|
A
|
Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling) |
Good for Dry Skin
|
|
2
|
|
Diethylamino Hydroxybenzoyl Hexyl Benzoate
(Uv Absorber, Uv Filter) |
|
|
1
|
A
|
Pentylene Glycol
(Skin Conditioning, Solvent) |
|
|
|
3-O-ETHYL ASCORBIC ACID
(Skin Conditioning) |
|
|
|
|
Ceramide AP
(Hair Conditioning, Skin Conditioning) |
|
|
|
|
Ceramide NS
(Hair Conditioning, Skin Conditioning) |
|
|
1
|
|
Ceramide NP
(Hair Conditioning, Skin Conditioning) |
|
|
1
|
|
Arbutin
(Antioxidant, Skin Conditioning) |
Good for Dry Skin
|
|
|
|
Vitis Vinifera Fruit Extract
(Skin Conditioning) |
|
|
|
|
Salvia Officinalis Extract
(Anti Seborrheic, Antimicrobial, Antioxidant, Astringent, Cleansing, Deodorant, Skin Conditioning, Skin Protecting, Soothing, Tonic) |
|
|
1
|
|
Sodium Acetylated Hyaluronate
(Humectant) |
|
|
1
|
|
Scutellaria Baicalensis Root Extract
(Astringent, Humectant, Soothing) |
|
|
|
|
Morus Alba Extract
(Antifoaming, Astringent, Humectant, Skin Conditioning) |
|
|
1
|
|
Anthemis Nobilis Flower Extract
(Masking, Perfuming, Skin Conditioning) |
Good for Sensitive Skin
Good for Dry Skin
|
|
|
|
Malpighia Emarginata Fruit Extract
(Hair Conditioning, Skin Conditioning) |
|
|
1
|
A
|
Hydrolyzed Collagen
(Hair Conditioning, Nail Conditioning Agent, Skin Conditioning, Antistatic Agent, Emollient, Film Forming, Humectant) |
|
|
1
3
|
B
|
Aloe Barbadensis Leaf Extract
(Emollient, Humectant, Oral Care Agent, Skin Conditioning) |
Good for Sensitive Skin
|
|
|
|
citrus aurantium dulcis peel oil
(Fragrance, Skin Conditioning) |
|
|
1
|
A
|
Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent) |
|
|
1
|
|
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
(Emulsion Stabilising, Film Forming, Viscosity Controlling) |
|
|
|
|
Hydrogenated Poly(C6-20 Olefin)
(Abrasive, Viscosity Controlling) |
|
|
3
|
B
|
Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
|
|
|
|
TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning) |
|
|
1
|
A
|
Disodium EDTA
(Chelating Agent, Viscosity Controlling) |
|
|
1
|
A
|
HDI/Trimethylol Hexyllactone Crosspolymer
(Anticaking Agent) |
|
|
4
|
A
|
Phenoxyethanol
(Fragrance, Preservative) |
Paraben
|
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How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
Trust & honesty
The concentrations these actives are typically effective at in research — not a measurement of this product.
L-ascorbic acid is usually used at 5–20% (around 10–15% is common). Above ~20% adds little and tends to irritate more; it also needs a low pH to work.
3-O-ETHYL ASCORBIC ACID
INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.
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