BIOTHERM Waterlover Sun Milk SPF 50+
Works for
Sun protectionSPF 50 · 5 UV filtersBroad spectrum
This product offers a good level of protection against both UVB and UVA rays.
This sunscreen uses organic (so-called "chemical") sunscreen filters. Organic, or "chemical" filters usually provide reliable sun protection and rarely leave a white cast. Sunscreens with organic filters can sting eyes.
This product can be considered "reef safe" because it does not contain the UV filters (oxybenzone and octinoxate) that can be harmful to coral reefs when present in the water in high concentrations.
Anti-agingSide benefit · TocopherolWorks well
This product can help prevent early signs of skin aging because it offers a good level of broad spectrum sun protection. Sun damage is the main cause of premature skin aging, and protecting your skin from the sun is the best anti-aging strategy.
Evens skin toneSide benefit · No ingredient credited for this claimWorks well
This product offers broad spectrum sun protection. It means that it can prevent hyperpigmentation and help keep the skin tone even (sun damage is the main factor causing age spots, darkening of post-acne marks and other discolorations).
MoisturizingSide benefit the brand mentions · C12-15 alkyl benzoate, Isopropyl myristate + 8 moreWorks
“Sun milk is rich in Biotech Plankton™* and glycerin for deep hydration and skin regeneration benefits.”
This product can help improve hydration of the skin with the two types of ingredients.
The first type is called “humectants”:
these ingredients help attract water.
When humectants are on the surface of the skin, they “pull in” the moisture from the outside environment, or from
within deeper layers of the skin. The following ingredients in this product do the job:
arginine, glycerin.
This product also contains ingredients called “occlusives”. They help reduce the speed with which our skin loses moisture to the outside environment. These ingredients also help soften the upper layer of the skin, so it feels less tight and nicer to the touch. The following ingredients in this product do the job: arginine, isopropyl myristate.
Can it cause trouble?
Irritancy2 strong irritants: Alcohol denat., ParfumMedium risk
Comedogenic2 ingredients rated 2 or more on the 0–5 pore-clogging scale2 flagged
User reviews
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Ingredients
Filter by role to see what each ingredient is doing.
Water~45–55%
Dicaprylyl ether~6.6–8%
- Irritation risk
- Low
Helps soften the upper layer of the skin while creating a non-greasy feel on the skin. Helps to dissolve other ingredients
More about Dicaprylyl etherC12-15 alkyl benzoate~4.4–5.4%
- Irritation risk
- Low
Enhances the product texture and makes it more spreadable. Helps reduce water loss from the outer layer of skin. Extands the shelf life by preventing bacteria growth
More about C12-15 alkyl benzoateAlcohol denat.~3.3–4%
- Irritation risk
- High
Produces temporary toning effect. Can help dissolve other ingredients or preserve products
More about Alcohol denat.Diethylamino hydroxybenzoyl hexyl benzoate~3.3–4%
- Irritation risk
- Medium
Uvinul A Plus. A new generation broad spectrum sunscreen that offers an effective protection especially in the UVA range. It is stable in formulations. Unfortunately, is not approved by the FDA (US) yet
More about Diethylamino hydroxybenzoyl hexyl benzoateIsopropyl myristate~2.1–2.6%
- Irritation risk
- Low
- Comedogenicity
- 3/5
An emollient that helps soften the skin. Could be comedogenic
More about Isopropyl myristatePhenylbenzimidazole sulfonic acid~2.3–2.8%
- Irritation risk
- Medium
Ensulizole. A UV filter that is effective against UVB rays. Does not protect against UVA light. It is photostable and can be used to help stabilize other sunscreen ingredients. It is water-soluble meaning that it can help create lighter sunscreen formulations
More about Phenylbenzimidazole sulfonic acidPropanediol~1.5–1.8%
- Irritation risk
- Low
Acts as a solvent for other ingredients. Speeds up the absorption of other ingredients into the skin
More about PropanediolGlycerin~1.3–1.6%
- Irritation risk
- Low
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
More about GlycerinArginine~0.95–1.15%
- Irritation risk
- Low
An amino acid that is naturally present in skin and helps keep it hydrated. When used together with AHAs, it can reduce their irritating effect on the skin
More about ArginineBis-ethylhexyloxyphenol methoxyphenyl triazine~1.2–1.4%
- Irritation risk
- Medium
Tinosorb S. One of the most effective broad spectrum sunscreen ingredients. Protects from both UVA and UVB rays. It is photostable. Approved by the US FDA in 2026 (listed as bemotrizinol on US labels).
More about Bis-ethylhexyloxyphenol methoxyphenyl triazineZea mays starch~0.6–0.85%
- Irritation risk
- Medium
- Comedogenicity
- 3/5
Used to thicken the product's consistency
More about Zea mays starchDrometrizole trisiloxane~0.75–1.1%
- Irritation risk
- Medium
Mexoryl XL. A UV filter. Effective in the UVB and UVA range. It is stable. Unfortunately, not approved in the US yet
More about Drometrizole trisiloxaneCopernicia cerifera cera~0.55–0.8%
- Irritation risk
- Low
Brazilian palm wax. Helps soften the upper layer of the skin
More about Copernicia cerifera ceraParfum~0.4–0.65%
- Irritation risk
- High
An aromatic blend of unspecified and possibly irritating ingredients
More about ParfumEthylhexyl triazone~0.6–0.9%
- Irritation risk
- Medium
Uvinul T. A UV filter. Effective against UVB rays. It is photostable. Can increase water resistance properties of the sunscreen. Unfortunately, not approved by the FDA (US) yet
More about Ethylhexyl triazoneBehenyl alcohol~0.5–0.7%
- Irritation risk
- Low
Non-drying alcohol that helps water and oil mix together. Also serves as an emollient
More about Behenyl alcoholSodium stearoyl glutamate~0.45–0.7%
- Irritation risk
- Medium
Helps oil and water mix together
More about Sodium stearoyl glutamateCaprylyl glycol~0.35–0.6%
- Irritation risk
- Medium
Helps preserve products and creates a nice product texture
More about Caprylyl glycolDextrin palmitate~0.25–0.5%
- Irritation risk
- Medium
Helps water and oil mix together
More about Dextrin palmitateAmmonium acryloyldimethyltaurate/vp copolymer~0.25–0.45%
- Irritation risk
- Low
Increases thickness of a product. Texture enhancer for oil-in-water emulsions
More about Ammonium acryloyldimethyltaurate/vp copolymerXanthan gum~0.2–0.4%
- Irritation risk
- Low
Used to create a thicker product consistency
More about Xanthan gumSclerotium gum~0.2–0.35%
- Irritation risk
- Low
Used to create gel-like formulas and stabilize emulsions
More about Sclerotium gumLecithin~0.2–0.4%
- Irritation risk
- Low
Used mostly for creating emulsions - helping oil and water mix together. Helps soften the upper layer of the skin
More about LecithinPullulan~0.15–0.3%
- Irritation risk
- High
Creates a thin drying film on the skin resulting in a short-term tightening effect
More about PullulanSilica~0.25–0.45%
T-butyl alcohol~0.1–0.15%
- Irritation risk
- Medium
Used to dissolve other ingredients and to improve smell of products. It could be irritating
More about T-butyl alcoholTocopherol~0.1–0.15%
- Irritation risk
- Low
Pure form of vitamin E. Can help moisturise and protect the skin from free radicals. Often used to help stabilise other ingredients or the formula itself
More about TocopherolVitreoscilla ferment~0.05–0.15%
- Irritation risk
- Low
Ingredient list view
Water, Dicaprylyl ether, C12-15 alkyl benzoate, Alcohol denat., Diethylamino hydroxybenzoyl hexyl benzoate, Isopropyl myristate, Phenylbenzimidazole sulfonic acid, Propanediol, Glycerin, Arginine, Bis-ethylhexyloxyphenol methoxyphenyl triazine, Zea mays starch, Drometrizole trisiloxane, Copernicia cerifera cera, Parfum, Ethylhexyl triazone, Behenyl alcohol, Sodium stearoyl glutamate, Caprylyl glycol, Dextrin palmitate, Ammonium acryloyldimethyltaurate/vp copolymer, Xanthan gum, Sclerotium gum, Lecithin, Pullulan, Silica, T-butyl alcohol, Tocopherol, Vitreoscilla ferment
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Worth comparing, line by line.
Match % combines shared ingredients, the first five ingredients, shared actives and hero ingredients, irritancy (lower counts in the alternative's favour), texture and body area. Only products in the same routine step are compared.
| BIOTHERMWaterlover Sun Milk SPF 50+YOUR PRODUCT | RITUALSThe Ritual of Namaste SPF 50 Daily Sun Protection | SVRFluide Photo-Age SPF50+ | TypologyCrème Solaire Corps SPF 30 à l'Aloe Vera | |
|---|---|---|---|---|
| Match | — | 45% | 41% | 41% |
| Price | — | $40.02 | $29.73 | $19.90 |
| Shared key ingredients | — | 6 of 9 | 5 of 9 | 5 of 9 |
| Key difference | — | Panthenol | Niacinamide | Butyrospermum Parkii Butter |
| Irritancy | Medium | Low | Low | Low |
| SPF | SPF 50 | SPF 50 | SPF 50 | SPF 30 |
| Drying alcohol | Contains drying alcohol | Contains drying alcohol | — | — |
| View product | Shop | Shop | Shop |
More alternatives: Ultrasun Sun Protection Extreme Very High Sun Protection for Sensitive Skin SPF50+Nø Cosmetics Glowy Sunfluid LSF50
Product summary
The ingredient list suggests that "BIOTHERM - Waterlover Sun Milk SPF 50+" can provide reliable sun protection. We love that it can protect from both UVA and UVB rays (not all sunscreens with SPF ratings give UVA protection. UVA rays do not cause sunburn, but still damage our skin and lead to early aging).
Because it includes good moisturizing ingredients, it can also work as a hydrating day cream. Like all broad-spectrum sunscreens, this product has an anti-aging benefit.
Sunscreen filters
This sunscreen uses so-called "chemical", or organic UV filters (organic simply means that their molecules contain atoms of carbon). These filters typically give good sun protection and rarely leave a white cast, but they can be irritating for sensitive skin. The UV filters in this sunscreen are: tinosorb s 2.00% - 2.40%, uvinul a plus 2.20% - 2.60%, mexoryl xl 0.45% - 0.70%, uvinul t 1.10% - 1.40% and ensulizole 1.50% - 1.80%.
Irritation risk
There are some common irritants in this product, including ingredients that do not have benefits for the skin. We assess the overall irritancy of this product to be medium. For a detailed overview of all potential irritants: click here
You can see the detailed formula review with the breakdown of all actives in the product and the full ingredient list with estimated concentrations in the tables below.
Sources cited in this review
Every concentration estimate and effectiveness label is anchored to one of these 5 studies and safety reviews.
- 1
- 2
- 3
- 4Vitamin E in dermatologyncbi.nlm.nih.gov
- 5Vitamin E and Skin Healthlpi.oregonstate.edu
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