PRODUCT REVIEW
Peter Thomas Roth Potent-C™ Vitamin C Power Serum
Works for:
based on ingredients and %- Anti-aging
- Evens skin tone
- Moisturizing
- Anti-oxidation
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Can it cause trouble?
Buy from Amazon US $73.50
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Price as of 12/9/2024 7:23 GMT.
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What can the product work for?
Works for
Anti-aging
What does the product description say?
Ultra-stable scientific breakthrough form of vitamin C that is 50 times more powerful than traditional vitamin C. . Vitamin E 3% and Ferulic Acid 2%.
tetrahexyldecyl ascorbate
9.2% -
11.2%
Irritation risk:
Concentration: Effectiveness: HIGH
Being a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.
ferulic acid
1.4% -
1.7%
Irritation risk:
Concentration: Effectiveness:
MEDIUM
A potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%
Evens skin tone
What does the product description say?
Dark Spots, Dullness, and Uneven Texture Formulation.
tetrahexyldecyl ascorbate
9.2% -
11.2%
Irritation risk:
Concentration: Effectiveness: HIGH
Being a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.
ferulic acid
1.4% -
1.7%
Irritation risk:
Concentration: Effectiveness:
MEDIUM
A potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%
Moisturizing
What does the product description say?
Packed with a jaw-dropping concentration of 20 percent THD ascorbate vitamin C, this serum’s performance is boosted by two ultra-powerful antioxidants to help hydrate and improve the look of fine lines, wrinkles, firmness, uneven skin tone, texture, and brightness.
glycerin
0.5% -
0.7%
Irritation risk:
Concentration: Effectiveness: HIGH
One of the best moisturizing ingredients. Naturally present in skin. It attracts water to the upper layer of the skin working as a humectant
sodium hyaluronate
0.7% -
1.05%
Irritation risk:
Concentration: Effectiveness: HIGH
One of the best moisturizing ingredients. Attracts water into the upper layer of the skin
squalane
1.3% -
1.5%
Irritation risk:
Concentration: Effectiveness: HIGH
An oil naturally present in skin. Works as an emollient to soften the skin and form a protective layer on its surface without a greasy feeling.
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Anti-oxidation
ferulic acid
1.4% -
1.7%
Irritation risk:
Concentration: Effectiveness: HIGH
A potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%
tetrahexyldecyl ascorbate
9.2% -
11.2%
Irritation risk:
Concentration: Effectiveness: HIGH
Being a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.
tocopheryl acetate
2.2% -
2.7%
Irritation risk:
Concentration: Effectiveness:
LOW
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.
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Honesty check
How honest is this product?
| Promise | Can it deliver? |
|---|---|
| Anti-aging | |
| Evens skin tone | |
| Moisturizing |
Total Promises Fulfilled score:
91/100.
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Can it cause trouble?
- Overall product irritation risk
- Acne & comedogenic risk ingredients: 0
Potential irritants
zingiber officinale root extract
0.6% -
0.95%
Irritation risk:
Works for:
Anti-oxidation
A plant extract that can contain an irritating essential oil. Might have some anti-oxidant effect, but evidence is lacking
curcuma longa root extract
0.55% -
0.85%
Irritation risk:
Works for:
Anti-inflammatory
A plant extract that can contain an active compound curcumin, that may have some anti-inflammatory properties when applied to the skin, but solid research is lacking and the typical concentration used in skincare products is too low. Can be an irritant
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Comodogenic ingredients
No comodogenic ingredients detected
User reviews (0)
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| Irritancy | IRRITANCY
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Ingredients & concentrations
All ingredients
Key Actives
ferulic acid
1.4% -
1.7%
Irritation risk:
Works for:
Anti-oxidation,
Evens skin tone,
Anti-inflammatory,
Anti-aging
A potent anti-oxidant that has been shown to be effective in neutralizing free radicals in skin. There seem to have a synergetic effect of ferulic acid, vitamin E and C, meaning that when the ingredients are used together, they enhance each other's ability protect the skin against free radicals. Ferulic acid also helps to stabilize other ingredients - including vitamins C and E. It can help to even out the skin tone. Ferulic acid is approved for use as a sunscreen ingredient in Japan in concentrations up to 10%
tetrahexyldecyl ascorbate
9.2% -
11.2%
Irritation risk:
Works for:
Anti-aging,
Anti-oxidation,
Evens skin tone
Being a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.
Show more
Potential irritants
zingiber officinale root extract
0.6% -
0.95%
Irritation risk:
Works for:
Anti-oxidation
A plant extract that can contain an irritating essential oil. Might have some anti-oxidant effect, but evidence is lacking
curcuma longa root extract
0.55% -
0.85%
Irritation risk:
Works for:
Anti-inflammatory
A plant extract that can contain an active compound curcumin, that may have some anti-inflammatory properties when applied to the skin, but solid research is lacking and the typical concentration used in skincare products is too low. Can be an irritant
Show more
Comodogenic ingredients
We couldn't find any comodogenic ingredients in this product
All ingredients
tetrahexyldecyl ascorbate
9.2% -
11.2%
Irritation risk:
Works for:
Anti-aging,
Anti-oxidation,
Evens skin tone
Being a lipid soluble form of vitamin C, it is more stable than ascorbic acid, but still degrades quickly and needs to be stabilized in a formulation with another ingredient. It is claimed to penetrate skin better than pure vitamin C and have the the similar benefits, but solid studies of its effectiveness are lacking. Is likely to require a higher concentration in a product than pure vitamin C to be effective. It might be able to help reduce pore clogging.
butylene glycol
4.9% -
5.9%
Irritation risk:
Works for:
Moisturizing
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
Show more
Ingredient list view
Water, Tetrahexyldecyl ascorbate, Butylene glycol, C9-12 alkane, Caprylyl methicone, Tocopheryl acetate, C10-18 triglycerides, Polyglyceryl-6 distearate, Ferulic acid, Squalane, Hydrogenated lecithin, Propanediol, Sodium hyaluronate, Zingiber officinale root extract, Curcuma longa root extract, Panax ginseng root extract, Jojoba esters, Leuconostoc/radish root ferment filtrate, Coco-caprylate/caprate, Glycerin, Cetyl alcohol, Polyglyceryl-3 beeswax, Xanthan gum, Disodium edta, Mica, Ethylhexylglycerin, Potassium sorbate, Sodium benzoate, Phenoxyethanol
Sources
- Double-blind, half-face study comparing topical vitamin C and vehicle for rejuvenation of photodamage
- Application of tetra-isopalmitoyl ascorbic acid in cosmetic formulations: Stability studies and in vivo efficacy
- Ferulic Acid: Therapeutic Potential Through Its Antioxidant Property
- Ferulic acid stabilizes a solution of vitamins C and E and doubles its photoprotection of skin
- Antioxidant Properties of Ferulic Acid and Its Possible Application
- Hyaluronic acid: A key molecule in skin aging
- Hyaluronan (Hyaluronic Acid): a natural moisturizer for skin care
- Some phytochemical, pharmacological and toxicological properties of ginger (Zingiber officinale Roscoe): A review of recent research
- Vaughn, A. R., Branum, A., & Sivamani, R. K. (2016). Effects of Turmeric (Curcuma longa) on Skin Health: A Systematic Review of the Clinical Evidence. Phytotherapy Research, 30(8), 1243–1264. doi:10.1002/ptr.5640
- Ginseng in Dermatology: A Review
- Antiaging effects of the mixture of Panax ginseng and Crataegus pinnatifida in human dermal fibroblasts and healthy human skin
- Safety Assessment of Alkyl Esters as Used in Cosmetics
- Glycerol and the skin: holistic approach to its origin and functions