Peter Thomas Roth Instant Mineral Broad Spectrum SPF 45 Sunscreen
Works for
1 of 1 advertised claim delivered
Sun protectionSPF 45 · 2 UV filtersBroad spectrum
This product offers a good level of protection against both UVB and UVA rays.
It is a mineral sunscreen. In other words, it contains non-organic UV filters. It will probably not sting your eyes but might leave a white cast.
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.
Evens skin toneNot advertised by the brand · 1 ingredient credited for this claimStrong support
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).
Can it cause trouble?
Irritancy1 strong irritant: Retinyl palmitateMedium risk
ComedogenicClean of flagged comedogenic ingredientsNone flagged
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Ingredients
Filter by role to see what each ingredient is doing.
Zinc oxide19.6%
- Irritation risk
- Low
A broad spectrum sunblock (protects from both UVA and UVB rays). Is suitable for most sensitive skins. In small concentrations, can be used as a colorant
More about Zinc oxideSilica~25–38%
Aluminum hydroxide~6.3–9.4%
- Irritation risk
- Low
Is used to add opaque (non-transparent) appearance to formulations. Can be used to coat other ingredients for even dispersion. This is a different ingredient compared to the ones used in antipersperants (aluminium chloride and aluminium chlorohydrate)
More about Aluminum hydroxideStearic acid~3.9–5.8%
- Irritation risk
- Low
Helps oil and water mix together and works as an emollient
More about Stearic acidPolymethylsilsesquioxane~2.7–4%
- Irritation risk
- Low
A silicone that improves product texture and helps dissolve other ingredients. Can form a non-greasy film on the skin to prevent moisture loss
More about PolymethylsilsesquioxaneTriethoxycaprylylsilane~2–3%
- Irritation risk
- Low
A type of silicone that helps oil and water mix well together. Helps to disperse other ingredients, e.g. pigments, evenly in a formulation
More about TriethoxycaprylylsilaneRetinyl palmitate~1.6–2.4%
- Irritation risk
- High
Three steps removed from the active form of vitamin A - retinoic acid. To have an effect in the skin, it first needs to be converted twice to become the retinoic acid. This means it is less potent than retinol, but could also be less irritating. Once converted to the retinoic acid in the skin, it helps against all signs of aging, improves skin cell turnover and helps fight blemishes and clogged pores. However, in many cosmetic formulations, it is used in a concentration that is too low to have the full effect
More about Retinyl palmitateTocopheryl acetate~1.3–2%
- Irritation risk
- Medium
A more stable but less bio-available form of vitamin E compared to Tocopherol. Might help moisturize and protect the skin from free radicals, but mostly used in low concentrations to stabilize other ingredients.
More about Tocopheryl acetateAscorbyl palmitate~1.1–1.7%
- Irritation risk
- Medium
Being a lipid soluble form of vitamin C, it is more stable and can penetrate the skin better than L-Ascorbic acid. It is effective in protecting the skin from free radicals, as well as evening the skin tone, but is less effective in stimulating collagen production compared to L-Ascorbic acid.
More about Ascorbyl palmitateSalix alba bark extract~0.9–1.35%
- Irritation risk
- High
A plant extract that can help neutralize free radicals in skin. It contains a compound salicin that can theoretically be converted into salicylic acid that, in turn, helps reduce inflammation in skin, but the evidence of effectiveness in skin is lacking and the extract is usually not used in a concentration that would enable an exfoliating effect
More about Salix alba bark extractWater~0.6–1.35%
Butylene glycol~0.5–1.1%
- Irritation risk
- Low
Used to create a nice product texture and help delivery of other ingredients. Might be somewhat helpful in attracting water to the upper layer of the skin
More about Butylene glycolChlorphenesin~0.16–0.32%
Potassium sorbate~0.3–0.6%
Tetrasodium edta~0.2–0.75%
Mica~0.2–0.7%
- Irritation risk
- Low
Creates an illusion of smoother and more radiant skin tone. Adds shimmer to the skin by reflecting light
More about MicaIron oxides~0.15–0.55%
- Irritation risk
- Low
An umbrella term for the following three colorants: CI 77491, CI 77492, CI 77499. They might be able to offer some protection against visible light, but the degree of the protection is not clear
More about Iron oxidesTitanium dioxide20.75%
- Irritation risk
- Low
Works as a UV filter when used in high concentrations. It is photostable and is effective mostly against the UVB light, with some protection in the UVA range. In small concentrations, used for its ability to improve the color of cosmetic products. Is usually well tolerated by the skin
More about Titanium dioxideCi 77742~0.05–0.25%
Ci 77163~0.05–0.15%
Chromium oxide greens~0.01–0.1%
- Irritation risk
- Low
Chromium hydroxide green~0.01–0.05%
Ingredient list view
Zinc oxide, Silica, Aluminum hydroxide, Stearic acid, Polymethylsilsesquioxane, Triethoxycaprylylsilane, Retinyl palmitate, Tocopheryl acetate, Ascorbyl palmitate, Salix alba bark extract, Water, Butylene glycol, Chlorphenesin, Potassium sorbate, Tetrasodium edta, Mica, Iron oxides, Titanium dioxide, Ci 77742, Ci 77163, Chromium oxide greens, Chromium hydroxide green
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Product summary
We assess that "Peter Thomas Roth - Instant Mineral Broad Spectrum SPF 45 Sunscreen" can provide reliable sun protection based on the ingredient list. It can protect from both UVA and UVB rays. This is great news because 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).
Sunscreen filters
This sunscreen is a mineral sunscreen. It uses titanium dioxide and zinc oxide for sun protection. Both titanium dioxide and zinc oxide almost never irritate even the most sensitive skin and eyes, but can leave a white cast.
Irritation risk
This product contains actives that can be irritating. We assess the overall irritancy of it 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.
Price
The product retails for 81.11A$ in Australia and from 21.54$ up to 48.97$ in the United States.
For a detailed price comparison: click here.
Sources cited in this review
Every concentration estimate and effectiveness label is anchored to one of these 8 studies and safety reviews.
- 1A review of inorganic UV filters zinc oxide and titanium dioxideonlinelibrary.wiley.com
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