111SKIN Y Theorem Repair Serum NAC Y2 Review

111SKIN Y Theorem Repair Serum NAC Y2
5.0
/ 10
Moisturizing
10.0 Humectancy icon Humectancy
0.0 Occlusivity icon Occlusivity
0.4Anti-wrinkle icon/ 10
Anti-wrinkle
Rich
in Antioxidants
Rich Skin Soothing icon
in Skin Soothers
Ingredients

111SKIN Y Theorem Repair Serum NAC Y2 Ingredients

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Full Ingredient List (INCI):

Glycerin, Water, Sorbitol, Isopropyl Myristate, Aloe Barbadensis Extract, Calendula Officinalis Extract, Alcohol, Phenoxyethanol, Carbomer, Sodium Hydroxide, Aesculus Hippocastanum (Horse Chestnut) Seed Extract, Sodium Ascorbyl Phosphate, Ethylhexylglycerin, Acetyl Cysteine, Panthenol, Niacinamide, Thiamine HCl, Riboflavin, Pyridoxine, Cyanocobalamin, Disodium EDTA, Fragrance
Review

Does 111SKIN Y Theorem Repair Serum NAC Y2 Work?

 
According to CreamScan's analysis of the ingredient list, here’s what 111SKIN Y Theorem Repair Serum NAC Y2 has to offer:
 
✅ Strong humectant moisturizing. This lightweight, humectant-rich product, ideal for oily skin, has a moisturizing rating of 5.0 out of 10.
✅ Slight anti-wrinkle effect: 111SKIN Y Theorem Repair Serum NAC Y2 has an anti-wrinkle rating of 0.4 out of 10, so you may expect a positive, although insignificant, effect on wrinkles.
✅ Soothing: 111SKIN Y Theorem Repair Serum NAC Y2 contains a high concentration of soothing ingredients, which may help to reduce irritation and calm the skin.
✅ Antioxidant protection

  

Key Benefits of 111SKIN Y Theorem Repair Serum NAC Y2

 
These are the key benefits you can expect from using 111SKIN Y Theorem Repair Serum NAC Y2:
 

🔵 Lightweight Purely Humectant Moisturizing, Ideal for Oily Skin

According to CreamScan analysis, 111SKIN Y Theorem Repair Serum NAC Y2 is quite moisturizing, with a moisturizing rating of 5.0 out of 10.

Is it more humectant or occlusive? It is purely humectant. It has zero occlusivity (we didn't find any occlusive ingredients on the ingredient list) and a maximum humectancy of 10 out of 10, primarily due to the high content of Glycerin (est. ≈45.0%), Sorbitol (est. ≈11.0%) and Aloe Barbadensis Extract (est. ≈4.0%).

This humectant-rich product, when used alone as a moisturizer, is ideal for oily skin, providing significant hydration in a lightweight, fast-absorbing formula without any occlusive ingredients.

📌 Certain studies suggest that humectants alone may not effectively moisturize the skin. If you use this product as your only moisturizer, we recommend following it with one that contains at least some occlusive ingredients.

💧 A Humectant Boost for Any Skincare Routine

But it’s not limited to oily skin - such a humectant boost will also positively contribute to the moisturizing efficacy of any skincare routine when used as a step before applying the main moisturizer. This type of formulation is typically used in serums, where a light, fast-absorbing texture is key.

Please refer to the Ratings section below for details of the moisturizing rating calculation.

🟣 Slight Anti-Wrinkle Efficacy

According to CreamScan analysis, 111SKIN Y Theorem Repair Serum NAC Y2 has a slight anti-wrinkle rating of 0.4 out of 10.

It contains one ingredient with proven anti-wrinkle efficacy: Niacinamide (est. ≈0.3%),
 one of the most effective and well-researched anti-wrinkle ingredients. A clinical study involving 30 participants (Kawada et al.) confirmed that a cream with 4% niacinamide reduced the average depth of wrinkles around the eyes by 9% after 8 weeks of use, compared to a vehicle (the same formulation without niacinamide).
 
Among others, 111SKIN Y Theorem Repair Serum NAC Y2 also contains Sodium Ascorbyl Phosphate, an ingredient often marketed as effective in reducing wrinkles. However, the studies supporting the anti-wrinkle claims of Sodium Ascorbyl Phosphate provide insufficient evidence of its efficacy according to CreamScan Research Evaluation Standards.
 
While this does not categorically rule out the possibility that Sodium Ascorbyl Phosphate may reduce wrinkles, its efficacy is not supported by convincing, vehicle-controlled, double-blind clinical studies - at least none that were available to the CreamScan team at the time of publication.
 
Therefore, this ingredient does not contribute to the anti-wrinkle rating.
 
📌 Moisturizers, when used regularly, are proven to prevent wrinkle formation and even reduce existing wrinkles. Therefore, this product, like any other moisturizer, can deliver some additional anti-wrinkle effects through its moisturizing action.
 

Please refer to the Ratings section below for details of the anti-wrinkle rating calculation.

🍀 Rich in Skin-Protecting Antioxidants

We estimate that 111SKIN Y Theorem Repair Serum NAC Y2 is rich (> 3%) in antioxidants, specifically Aloe Barbadensis Extract (est. ≈4.0%) and Calendula Officinalis Extract (est. ≈3.0%).

A key benefit of antioxidants is their ability to reduce oxidative stress caused by free radicals and therefore prevent accelerated skin aging. Studies also show that antioxidants can protect against environmental damage such as UV radiation and pollution, and help reduce inflammation and skin redness.

🔴 Skin Soothing and Calming Potential

Based on the ingredient list analysis, 111SKIN Y Theorem Repair Serum NAC Y2 is rich (> 5%) in soothing ingredients, particularly Aloe Barbadensis Extract (est. ≈4.0%) and Calendula Officinalis Extract (est. ≈3.0%).

When applied to the skin, compounds of soothing ingredients, such as triglycerides, phospholipids, fatty acids, phenolic compounds, and antioxidants, work together to soothe the skin through various mechanisms: reducing inflammation, promoting wound healing, repairing the skin barrier, and providing antimicrobial and antioxidant activities.

📌 Please note that this is not a complete list of benefits. We are in the process of enhancing our model to incorporate anti-pigmentation, exfoliation and anti-acne ratings.

Things to Be Aware Of: 111SKIN Y Theorem Repair Serum NAC Y2

 
CreamScan identified a few things to consider before adding 111SKIN Y Theorem Repair Serum NAC Y2 to your skincare routine:
 

⚠️ If It’s Your Only Moisturizer, It Needs to Be Paired with Some Occlusives

While humectants are highly effective at attracting water to the skin, studies (J. N. Kraft, C. W. Lynde) suggest they may not be efficient when used alone.

One major drawback of purely humectant moisturization is that the water attracted by humectants to the upper layers of the skin can evaporate completely into the environment through transepidermal water loss (TEWL). Adding occlusive ingredients helps seal this moisture into the skin and prevent further water loss.

If you’re using 111SKIN Y Theorem Repair Serum NAC Y2 as your only moisturizer, consider pairing it with one that contains at least some occlusive ingredients, such as oils, butters, or silicones. These work alongside humectants to create a protective barrier, locking in hydration and ensuring longer-lasting moisturization. The amount of occlusive needed depends on your skin type - the drier the skin, the more occlusives it requires.

If this product is used not as a standalone moisturizer but as part of your skincare routine, such as a toner or serum, it should be applied before your main moisturizer (unless it's a sunscreen), which will provide the necessary occlusivity on top of it.

Pros & Cons of 111SKIN Y Theorem Repair Serum NAC Y2

 
Here’s an overview of the pros and cons of 111SKIN Y Theorem Repair Serum NAC Y2 to help you decide if it’s the right choice for your skincare routine:
 

🟩 Pros:

✅ When used alone: Provides humectant-rich moisturizing ideal for oily skin
✅ As part of a routine: A humectant moisturizing boost, beneficial for any skin type
✅ Lightweight texture
Provides slight anti-wrinkle efficacy
✅ Rich in antioxidants that combat oxidative stress associated with accelerated skin aging and defend against environmental damage
✅ Potentially soothing, as it contains a high concentration of soothing ingredients like Aloe Barbadensis Extract and Calendula Officinalis Extract
 

⭕ Cons: 

⚠️ Only if used as a standalone moisturizer - it needs to be paired with occlusives to seal in humectants
   

Summary: 111SKIN Y Theorem Repair Serum NAC Y2

 
Based on the ingredient list analysis, CreamScan AI suggests that 111SKIN Y Theorem Repair Serum NAC Y2
, when used alone, delivers lightweight, humectant-rich moisturizing, making it ideal for oily skin. As part of a moisturizing routine, it provides a humectant boost, beneficial for all skin types.
 
111SKIN Y Theorem Repair Serum NAC Y2 contains ingredients with proven evidence of anti-wrinkle efficacy that may offer a slight anti-wrinkle effect. As a result, you can expect a positive, though relatively minimal, impact on wrinkles.
 
 
Rich in antioxidants, 111SKIN Y Theorem Repair Serum NAC Y2 helps protect against free radical damage and offers multiple benefits for all skin types, including preventing premature aging, defending against environmental damage, and calming inflammation. This product is also formulated with a high concentration of soothing ingredients, offering the potential to calm and comfort irritated skin. Whether you’re experiencing redness, irritation, or general sensitivity, its soothing properties may help restore balance and provide relief.
 
That said, there are some things about 111SKIN Y Theorem Repair Serum NAC Y2 worth noting.
 
Looking at its moisturizing profile, we found that it doesn’t contain any occlusive ingredients, potentially allowing the moisture attracted to the skin by humectants to evaporate. Therefore, if it’s used as the only moisturizer in a routine, it’s recommended to pair it with one that contains at least some occlusive ingredients, such as oils, butters, or silicones.
 
📌 Fact check. At CreamScan, we are committed to accuracy and fairness. If you spot any errors or something that doesn’t seem right, please click here to let us know. We regularly update the ingredient lists and monitor the latest research on ingredient efficacy to ensure that our information remains as complete and precise as possible. The information provided here is for informational purposes only and does not substitute professional advice. We do not guarantee the efficacy or safety of any product, as individual results may vary.

 

Ingredient Breakdown

Est. % Ingredient Origin Functions
45
22
11
6
4
3
2
1
1
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Est. %
Glycerin
Function:
Origin:
Water
Function:
Origin:
Sorbitol
Function:
Origin:
Isopropyl Myristate
Function:
Origin:
Aloe Barbadensis Extract
Function:
Origin:
Calendula Officinalis Extract
Function:
Origin:
Alcohol
Function:
Origin:
Phenoxyethanol
Function:
Origin:
Carbomer
Function:
Origin:
Sodium Hydroxide
Function:
Origin:
Aesculus Hippocastanum (Horse Chestnut) Seed Extract
Function:
Origin:
Sodium Ascorbyl Phosphate
Function:
Origin:
Ethylhexylglycerin
Function:
Origin:
Acetyl Cysteine
Function:
Origin:
Panthenol
Function:
Origin:
Niacinamide
Function:
Origin:
Thiamine HCl
Function:
Origin:
Riboflavin
Function:
Origin:
Pyridoxine
Function:
Origin:
Cyanocobalamin
Function:
Origin:
Disodium EDTA
Function:
Origin:
Fragrance
Function:
Origin:

Ratings

All humectants
60.9
45
11
4
0.3
0.3
0.3
Benchmark
10
All occlusives
0.0
None
Benchmark
20
Moisturizing rating
5.0
Ingredient Est. % Benchmark Raiting
Humectancy All humectants 60.9 10
10.0
45
11
4
0.3
0.3
0.3
Occlusivity All occlusives 0.0 20
0.0
None
Moisturizing rating
5.0
Ingredient Est. % Benchmark Humectancy
45
11
4
0.3
0.3
0.3
All humectants 60.9 10
10
All humectants
60.9
45
11
4
0.3
0.3
0.3
Benchmark
10
Ingredient Est. % Benchmark Occlusivity
None
All occlusives 0.0 20
0.0
All occlusives
0.0
None
Benchmark
20
Ingredient
Ingredient anti-wrinkle power
when present at, %
in this formula est. %
Rating
6 /10 4 0.3 0.4
n/a
- 0.3 -
Total
0.4
Niacinamide
0.4
Ingredient anti-wrinkle power
6 /10
when present at, %
4
in this formula, est. %
0.3
Sodium Ascorbyl Phosphate
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Anti-wrinkle rating
0.4
Ingredient Est. % Benchmark
Rich in Antioxidants
4
3
0.3
0.3
0.3
0.3
0.3
All antioxidants 8.5 3 Rich in antioxidants
All antioxidants
8.5
Aloe Barbadensis Extract
4
Calendula Officinalis Extract
3
Niacinamide
0.3
Aesculus Hippocastanum (Horse Chestnut) Seed Extract
0.3
Sodium Ascorbyl Phosphate
0.3
Acetyl Cysteine
0.3
Riboflavin
0.3
Benchmark
3
Ingredient Est. % Benchmark
Rich in Soothing
4
3
0.3
0.3
0.3
0.3
All soothing 8.2 5 Rich in soothing
All soothing
8.2
4
3
0.3
0.3
0.3
0.3
Benchmark
5

Ingredients explained

Glycerin
Est. %45
Function
Origin
Glycerin

The most popular moisturizing ingredient in the world. It is a powerful humectant – cheap yet very effective.

Water
Est. %22
Function
Origin
WaterThe most used ingredient in skincare. Its concentration defines the product texture: rich creams may have about 50% of water while a light jelly about 90%. Water doesn’t moisturize the skin by itself and is used in skincare as a solvent for other ingredients.
Sorbitol
Est. %11
Function
Origin
SorbitolA sweet-tasting alcohol derived from glucose. Aside from its sweet taste (for which it is used as a very common sweetener), Sorbitol is also very good at retaining water and is used in skincare as a humectant.
Isopropyl Myristate
Est. %6
Function
Origin
Isopropyl MyristateA fast-spreading, cost-effective, non-greasy emollient that is typically used for lubrication, spreadability, or to remove “tackiness” from a product. Isopropyl Myristate is listed as a common comedogenic ingredient by acne.org.
Aloe Barbadensis Extract
Est. %4
Function
Origin
Aloe Barbadensis ExtractAn antioxidant extract from the gelatinous pulp of Aloe vera leaves with humectant moisturizing polysaccharide mucilage. It is suitable for irritated or eczema-prone skin.
Calendula Officinalis Extract
Est. %3
Function
Origin
Calendula Officinalis ExtractA soothing extract derived from the marigold plant. It is rich in anti-inflammatory and antioxidant carotenoids, flavonoids, and triterpenes.
Alcohol
Est. %2
Function
Origin
AlcoholAn effective antimicrobial ingredient that kills bacteria, fungi, and even some viruses. It is also an excellent solvent and astringent. Alcohol helps to create lighter and less viscous products. It can, however, be dehydrating and skin-sensitizing.
Phenoxyethanol
Est. %1
Function
Origin
PhenoxyethanolThe most frequently used preservative in skincare. It is a clear, oil-like liquid synthetic substance that protects products from harmful bacteria and yeast, whilst still leaving skin microflora unharmed. It is confirmed by research to be harmless.
Carbomer
Est. %1
Function
Origin
CarbomerA synthetic ingredient with the ability to gel water. When used in emulsions, such as lotions and creams, carbomer can also act as an emulsion stabilizer.
Sodium Hydroxide
Est. %0.3
Function
Origin
Sodium Hydroxide

An ingredient that is able to bring the pH of a product up, thereby making it less harsh on the skin.

Aesculus Hippocastanum (Horse Chestnut) Seed Extract
Est. %0.3
Function
Origin
Aesculus Hippocastanum (Horse Chestnut) Seed ExtractDerived from horse chestnut seeds, this soothing extract contains an anti-inflammatory mixture called Aescin. It is suitable for inflamed and irritated skin.
Sodium Ascorbyl Phosphate
Est. %0.3
Function
Origin
Sodium Ascorbyl PhosphateThe most researched derivative of vitamin C. It boosts collagen synthesis, thereby improving skin structure and elasticity. SAP is effective in the treatment of inflamed acne lesions and has a weak but positive effect on pigmentation issues.
Ethylhexylglycerin
Est. %0.3
Function
Origin
EthylhexylglycerinA preservative booster derived from glycerin. It is commonly paired with other preservatives to improve their efficacy. Ethylhexylglycerin is also a humectant due to its chemical base of glycerin.
Acetyl Cysteine
Est. %0.3
Function
Origin
Acetyl Cysteine
Panthenol
Est. %0.3
Function
Origin
PanthenolA popular soothing and moisturizing derivative of vitamin B5. Panthenol is particularly beneficial for dry, flaking, burned, or damaged skin. It is used to alleviate the symptoms of a rash, dermatitis, eczema, chapped lips, and sunburn.
Niacinamide
Est. %0.3
Function
Origin
Niacinamide

Also known as vitamin B3, this ingredient is a true superstar with confirmed moisturizing, anti-acne, hyperpigmentation, and antioxidant benefits. Two studies confirm its significant anti-wrinkle efficacy.

Thiamine HCl
Est. %0.3
Function
Origin
Thiamine HClAlso known as vitamin B1, the benefits of this ingredient in skincare are not yet clear. It may have some benefits to energy metabolism, but this hasn't been confirmed. It has a typical, sulfur-like smell.
Riboflavin
Est. %0.3
Function
Origin
RiboflavinRiboflavin, also known as Vitamin B2, is used in skincare as a coloring agent due to its bright, brilliant orange-yellow color. The research shows that it is a good antioxidant and can protect the skin from UV-induced damage.
Pyridoxine
Est. %0.3
Function
Origin
PyridoxinePyridoxine, also known as vitamin B6, is required by the body to produce amino acids, carbohydrates, and lipids. Its benefits in skincare have not been researched as of yet.
Cyanocobalamin
Est. %0.3
Function
Origin
CyanocobalaminA product of bacterial fermentation that may have soothing and rejuvenating skin effects.
Disodium EDTA
Est. %0.3
Function
Origin
Disodium EDTAA synthetic chelator that helps to maintain the look and smell of a product by 'locking up' troublesome metal ions.
Fragrance
Est. %0.3
Function
Origin
FragranceUnder trade secret law, manufacturers have the right not to disclose what exactly went into the fragrance and use the unspecific word Fragrance or Parfum instead. Many fragrances are highly allergenic.