PRODUCT REVIEW
sk.in flash | repair shot
Works for:
based on ingredients and %- Anti-blemish
- Anti-aging
- Evens skin tone
- Moisturizing
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Can it cause trouble?
Buy from Amazon CA CA$0.00
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Price as of 7/12/2025 0:30 GMT.
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What can the product work for?
Works for
Anti-blemish
What does the product description say?
in flash also targets and treats oily or acne-prone skin by reducing sebum production and pore size.
hydroxypinacolone retinoate
0.65% -
0.95%
Irritation risk:
Concentration: Effectiveness: HIGH
A derivative of the most potent form of vitamin A, retinoic acid. The ingredient can be sold under name Granactive Retinoid. Note that if a skincare brand discloses the concentration of Granactive Retinoid in a product, the concentration refers to a diluted form of Hydroxypinacolone Retinoate: 1% of Granactive Retinoid corresponds to 0.1% of Hydroxypinacolone Retinoate. Hydroxypinacolone Retinoate (HPR) is a unique derivative of retinoic acid because it can directly work in the skin and does not require additional conversion steps. According to studies done by the manufacturer on models of human skin (not real people), this derivative is more effective than other cosmetic versions of retinoids (such as retinol, retinaldehyde, and retinyl palmitate), and, at the same time, causes less irritation. It has been also demonstrated to be more stable than retinol which makes formulating with easier and increases the chances that a product with it will maintain its effectiveness after opening. The packaging should still ideally be air-tight. HPR is available over the counter in the EU, UK, Asia, Australia and New Zealand, but is only with a prescription in Canada.
Anti-aging
What does the product description say?
in flash products are designed to deliver a potent repair shot and counteract the signs of UV sun damage and intrinsic skin ageing.
hydroxypinacolone retinoate
0.65% -
0.95%
Irritation risk:
Concentration: Effectiveness: HIGH
A derivative of the most potent form of vitamin A, retinoic acid. The ingredient can be sold under name Granactive Retinoid. Note that if a skincare brand discloses the concentration of Granactive Retinoid in a product, the concentration refers to a diluted form of Hydroxypinacolone Retinoate: 1% of Granactive Retinoid corresponds to 0.1% of Hydroxypinacolone Retinoate. Hydroxypinacolone Retinoate (HPR) is a unique derivative of retinoic acid because it can directly work in the skin and does not require additional conversion steps. According to studies done by the manufacturer on models of human skin (not real people), this derivative is more effective than other cosmetic versions of retinoids (such as retinol, retinaldehyde, and retinyl palmitate), and, at the same time, causes less irritation. It has been also demonstrated to be more stable than retinol which makes formulating with easier and increases the chances that a product with it will maintain its effectiveness after opening. The packaging should still ideally be air-tight. HPR is available over the counter in the EU, UK, Asia, Australia and New Zealand, but is only with a prescription in Canada.
ascorbyl tetraisopalmitate
4.4% -
5.4%
Irritation risk:
Concentration: Insufficient!
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
Evens skin tone
What does the product description say?
in flash minimizes pore size, increases collagen production, diminishes pigmentation, and improves fine lines and wrinkles.
hydroxypinacolone retinoate
0.65% -
0.95%
Irritation risk:
Concentration: Effectiveness: HIGH
A derivative of the most potent form of vitamin A, retinoic acid. The ingredient can be sold under name Granactive Retinoid. Note that if a skincare brand discloses the concentration of Granactive Retinoid in a product, the concentration refers to a diluted form of Hydroxypinacolone Retinoate: 1% of Granactive Retinoid corresponds to 0.1% of Hydroxypinacolone Retinoate. Hydroxypinacolone Retinoate (HPR) is a unique derivative of retinoic acid because it can directly work in the skin and does not require additional conversion steps. According to studies done by the manufacturer on models of human skin (not real people), this derivative is more effective than other cosmetic versions of retinoids (such as retinol, retinaldehyde, and retinyl palmitate), and, at the same time, causes less irritation. It has been also demonstrated to be more stable than retinol which makes formulating with easier and increases the chances that a product with it will maintain its effectiveness after opening. The packaging should still ideally be air-tight. HPR is available over the counter in the EU, UK, Asia, Australia and New Zealand, but is only with a prescription in Canada.
ascorbyl tetraisopalmitate
4.4% -
5.4%
Irritation risk:
Concentration: Insufficient!
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
Moisturizing
What does the product description say?
Specifically designed for improving skin texture and hydration, sk.
sodium hyaluronate
0.95% -
1.15%
Irritation risk:
Concentration: Effectiveness: HIGH
One of the best moisturizing ingredients. Attracts water into the upper layer of the skin
glycerin
3.1% -
3.8%
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
dimethicone
0.5% -
0.7%
Irritation risk:
Concentration: Effectiveness: HIGH
A silicone that helps to reduce water loss from the surface of the skin. Can temporarily "fill in" lines and wrinkles, absorb oil, and create a nice product finish
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Honesty check
How honest is this product?
| Promise | Can it deliver? |
|---|---|
| Anti-aging | |
| Evens skin tone | |
| Anti-blemish | |
| Moisturizing |
Total Promises Fulfilled score:
93/100.
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Can it cause trouble?
- Overall product irritation risk
- Acne & comedogenic risk ingredients: 0
Potential irritants
hydroxypinacolone retinoate
0.65% -
0.95%
Irritation risk:
Works for:
Anti-blemish,
Anti-aging,
Evens skin tone,
Exfoliation
A derivative of the most potent form of vitamin A, retinoic acid. The ingredient can be sold under name Granactive Retinoid. Note that if a skincare brand discloses the concentration of Granactive Retinoid in a product, the concentration refers to a diluted form of Hydroxypinacolone Retinoate: 1% of Granactive Retinoid corresponds to 0.1% of Hydroxypinacolone Retinoate. Hydroxypinacolone Retinoate (HPR) is a unique derivative of retinoic acid because it can directly work in the skin and does not require additional conversion steps. According to studies done by the manufacturer on models of human skin (not real people), this derivative is more effective than other cosmetic versions of retinoids (such as retinol, retinaldehyde, and retinyl palmitate), and, at the same time, causes less irritation. It has been also demonstrated to be more stable than retinol which makes formulating with easier and increases the chances that a product with it will maintain its effectiveness after opening. The packaging should still ideally be air-tight. HPR is available over the counter in the EU, UK, Asia, Australia and New Zealand, but is only with a prescription in Canada.
ascorbyl tetraisopalmitate
4.4% -
5.4%
Irritation risk:
Works for:
Anti-oxidation,
Evens skin tone,
Anti-aging,
Moisturizing
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
Show more
Comodogenic ingredients
No comodogenic ingredients detected
User reviews (0)
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| WIMJ similarity score |
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| Irritancy | IRRITANCY
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LOW
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MEDIUM
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HIGH
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MEDIUM
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HIGH
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HIGH
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HIGH
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HIGH
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Ingredients & concentrations
All ingredients
Key Actives
ascorbyl tetraisopalmitate
4.4% -
5.4%
Irritation risk:
Works for:
Anti-oxidation,
Evens skin tone,
Anti-aging,
Moisturizing
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
hydroxypinacolone retinoate
0.65% -
0.95%
Irritation risk:
Works for:
Anti-blemish,
Anti-aging,
Evens skin tone,
Exfoliation
A derivative of the most potent form of vitamin A, retinoic acid. The ingredient can be sold under name Granactive Retinoid. Note that if a skincare brand discloses the concentration of Granactive Retinoid in a product, the concentration refers to a diluted form of Hydroxypinacolone Retinoate: 1% of Granactive Retinoid corresponds to 0.1% of Hydroxypinacolone Retinoate. Hydroxypinacolone Retinoate (HPR) is a unique derivative of retinoic acid because it can directly work in the skin and does not require additional conversion steps. According to studies done by the manufacturer on models of human skin (not real people), this derivative is more effective than other cosmetic versions of retinoids (such as retinol, retinaldehyde, and retinyl palmitate), and, at the same time, causes less irritation. It has been also demonstrated to be more stable than retinol which makes formulating with easier and increases the chances that a product with it will maintain its effectiveness after opening. The packaging should still ideally be air-tight. HPR is available over the counter in the EU, UK, Asia, Australia and New Zealand, but is only with a prescription in Canada.
Show more
Potential irritants
hydroxypinacolone retinoate
0.65% -
0.95%
Irritation risk:
Works for:
Anti-blemish,
Anti-aging,
Evens skin tone,
Exfoliation
A derivative of the most potent form of vitamin A, retinoic acid. The ingredient can be sold under name Granactive Retinoid. Note that if a skincare brand discloses the concentration of Granactive Retinoid in a product, the concentration refers to a diluted form of Hydroxypinacolone Retinoate: 1% of Granactive Retinoid corresponds to 0.1% of Hydroxypinacolone Retinoate. Hydroxypinacolone Retinoate (HPR) is a unique derivative of retinoic acid because it can directly work in the skin and does not require additional conversion steps. According to studies done by the manufacturer on models of human skin (not real people), this derivative is more effective than other cosmetic versions of retinoids (such as retinol, retinaldehyde, and retinyl palmitate), and, at the same time, causes less irritation. It has been also demonstrated to be more stable than retinol which makes formulating with easier and increases the chances that a product with it will maintain its effectiveness after opening. The packaging should still ideally be air-tight. HPR is available over the counter in the EU, UK, Asia, Australia and New Zealand, but is only with a prescription in Canada.
ascorbyl tetraisopalmitate
4.4% -
5.4%
Irritation risk:
Works for:
Anti-oxidation,
Evens skin tone,
Anti-aging,
Moisturizing
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
Show more
Comodogenic ingredients
We couldn't find any comodogenic ingredients in this product
All ingredients
dimethyl isosorbide
7.2% -
8.8%
Irritation risk:
Used to dissolve other ingredients in a product and can enhance their ability to penetrate the skin
ascorbyl tetraisopalmitate
4.4% -
5.4%
Irritation risk:
Works for:
Anti-oxidation,
Evens skin tone,
Anti-aging,
Moisturizing
A vitamin C derivative. Studies show that is might be effective in reducing hyperpigmentation, but there are no studies confirming that it is effectively converted into the bioavailable form of Vitamin C in skin. It is not clear how this derivative compares in effectiveness to the topical application of bioavailable form of vitamin C (L-ascorbic acid)
Show more
Ingredient list view
Water, Dimethyl isosorbide, Ascorbyl tetraisopalmitate, Glycerin, Peg-8, Peg-8/smdi copolymer, Palmitoyl myristyl serinate, Sodium polyacrylate, Hydroxypinacolone retinoate, Sodium hyaluronate, Isohexadecane, Tocopheryl acetate, Ammonium polyacryloyldimethyl taurate, Polysorbate 20, Dimethicone, Cyclopentasiloxane, Polysilicone-11, Polysorbate 80, Disodium edta, Phenoxyethanol, Ethylhexylglycerin, Sodium metabisulfite, Trimethoxybenzylidene pentanedione, Silicon
Sources
- Activity enhancement of ferulic acid with dimethyl isosorbride in cosmetic compositions
- Assessment of penetration of Ascorbyl Tetraisopalmitate into biological membranes by molecular dynamics
- Stability evaluation of tocopheryl acetate and ascorbyl tetraisopalmitate in isolation and incorporated in cosmetic formulations using thermal analysis
- A new lipophilic pro-vitamin C, tetra-isopalmitoyl ascorbic acid (VC-IP), prevents UV-induced skin pigmentation through its anti-oxidative properties
- New lipophilic pro-vitamin C, tetra-isopalmitoyl ascorbic acid (VC-IP), suppresses senile lentigo through controlling of melanocytes-keratinocytes interaction
- Glycerol and the skin: holistic approach to its origin and functions
- Antiaging effects of retinoid hydroxypinacolone retinoate on skin models. (2018). Journal of the American Academy of Dermatology, 79(3), AB44. doi:10.1016/j.jaad.2018.05.215
- Treatment of mild to moderate acne with a fixed combination of hydroxypinacolone retinoate, retinol glycospheres and papain glycospheres
- Hyaluronic acid: A key molecule in skin aging
- Hyaluronan (Hyaluronic Acid): a natural moisturizer for skin care
- Safety Assessment of Acryloyldimethyltaurate Polymers as Used in Cosmetics
- Dimethicone as a protective ingredient in topical medications
- Final Report on the Safety Assessment of Dimethicone Copolyol