Royues Watermelon Niacinamide Serum Review

Royues Watermelon Niacinamide Serum
5.0
/ 10
Moisturizing
10.0 Humectancy icon Humectancy
0.0 Occlusivity icon Occlusivity
0.4Anti-wrinkle icon/ 10
Anti-wrinkle
Review

Does Royues Watermelon Niacinamide Serum Work?

 
According to CreamScan AI's analysis of the ingredient list, here’s what Royues Watermelon Niacinamide Serum 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: Royues Watermelon Niacinamide Serum has an anti-wrinkle rating of 0.4 out of 10, so you may expect a positive, although insignificant, effect on wrinkles.

  

Key Benefits of Royues Watermelon Niacinamide Serum

 
These are the key benefits you can expect from using Royues Watermelon Niacinamide Serum:
 

🔵 Lightweight Purely Humectant Moisturizing, Ideal for Oily Skin

According to CreamScan analysis, Royues Watermelon Niacinamide Serum 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 Propylene Glycol (est. ≈45.0%), Glycerin (est. ≈22.0%) and Glycereth-26 (est. ≈11.0%).

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, Royues Watermelon Niacinamide Serum 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, Royues Watermelon Niacinamide Serum also contains Beta-Glucan, an ingredient often marketed as effective in reducing wrinkles. However, the studies supporting the anti-wrinkle claims of Beta-Glucan provide insufficient evidence of its efficacy according to CreamScan Research Evaluation Standards.
 
While this does not categorically rule out the possibility that Beta-Glucan 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.

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

Things to Be Aware Of: Royues Watermelon Niacinamide Serum

 
CreamScan AI identified a few things to consider before adding Royues Watermelon Niacinamide Serum 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 Royues Watermelon Niacinamide Serum 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 Royues Watermelon Niacinamide Serum

 
Here’s an overview of the pros and cons of Royues Watermelon Niacinamide Serum 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
 

⭕ Cons: 

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

Summary: Royues Watermelon Niacinamide Serum

 
Based on the ingredient list analysis, CreamScan AI suggests that Royues Watermelon Niacinamide Serum
, 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.
 
Royues Watermelon Niacinamide Serum 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.
 
 
That said, there are some things about Royues Watermelon Niacinamide Serum 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.

 

Ingredients

Est. % Ingredient Origin Functions
45
22
11
6
4
3
2
1.5
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. %
Propylene Glycol
Function:
Origin:
Glycerin
Function:
Origin:
Glycereth-26
Function:
Origin:
Maltooligosyl Glucoside
Function:
Origin:
Ethylhexyl Palmitate
Function:
Origin:
Water
Function:
Origin:
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Function:
Origin:
Triethanolamine
Function:
Origin:
Phenoxyethanol
Function:
Origin:
Hydrogenated Starch Hydrolysate
Function:
Origin:
Cetearyl Alcohol
Function:
Origin:
Glyceryl Stearate
Function:
Origin:
Caprylyl Glycol
Function:
Origin:
PEG-100 Stearate
Function:
Origin:
Coco-Glucoside
Function:
Origin:
Methylparaben
Function:
Origin:
Niacinamide
Function:
Origin:
Fragrance
Function:
Origin:
Sodium Hyaluronate
Function:
Origin:
1,2-Hexanediol
Function:
Origin:
Beta-Glucan
Function:
Origin:
Ethylhexylglycerin
Function:
Origin:

Ratings

All humectants
79.8
45
22
11
0.3
0.3
0.3
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 79.8 10
10.0
45
22
11
0.3
0.3
0.3
0.3
0.3
0.3
Occlusivity All occlusives 0.0 20
0.0
None
Moisturizing rating
5.0
Ingredient Est. % Benchmark Humectancy
45
22
11
0.3
0.3
0.3
0.3
0.3
0.3
All humectants 79.8 10
10
All humectants
79.8
45
22
11
0.3
0.3
0.3
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
Beta-Glucan
-
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
0.3
0.3
0.3
All antioxidants 0.9 3 No
All antioxidants
0.9
Niacinamide
0.3
Sodium Hyaluronate
0.3
Beta-Glucan
0.3
Benchmark
3
Ingredient Est. % Benchmark
Rich in Soothing
0.3
0.3
All soothing 0.6 5 No
All soothing
0.6
0.3
0.3
Benchmark
5

Ingredients explained

Propylene Glycol
Est. %45
Function
Origin
Propylene GlycolA clear, thick, odorless liquid of synthetic origin. Its main function is to stabilize cosmetic products exposed to varying temperatures. It is also a moderately strong humectant with similar properties to glycerin.
Glycerin
Est. %22
Function
Origin
Glycerin

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

Glycereth-26
Est. %11
Function
Origin
Glycereth-26

A glycerin-based ingredient with humectant moisturizing properties. It is an excellent emulsifier and thickener.

Maltooligosyl Glucoside
Est. %6
Function
Origin
Maltooligosyl Glucoside
Ethylhexyl Palmitate
Est. %4
Function
Origin
Ethylhexyl PalmitateA rich emollient without the oily after-feel, making it a popular replacement for mineral oil. It is derived from natural sources such as palm oil and palm kernel oil. Ethylhexyl palmitate is listed as a common comedogenic ingredient by acne.org.
Water
Est. %3
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.
Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Est. %2
Function
Origin
Acrylates/C10-30 Alkyl Acrylate CrosspolymerA synthetic ingredient that is used to thicken water and alcohol. It results in a more lightweight formula and is commonly found in gel products.
Triethanolamine
Est. %1.5
Function
Origin
TriethanolamineA clear, colorless, and highly viscous liquid, this ingredient is an excellent pH adjuster. When it is necessary to neutralize an acidic solution or to generally increase the pH of a product, triethanolamine is a common choice.
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.
Hydrogenated Starch Hydrolysate
Est. %0.3
Function
Origin
Hydrogenated Starch HydrolysateA starch-based syrup that binds to water and helps to form a film on the skin’s surface.
Cetearyl Alcohol
Est. %0.3
Function
Origin
Cetearyl AlcoholA blend of cetyl alcohol and stearyl alcohol, the fatty alcohols that are derived from palm oil. It helps to create emulsions that give off a soft and silky emollient feel and also increase product thickness.
Glyceryl Stearate
Est. %0.3
Function
Origin
Glyceryl StearateAn emollient and emulsifier typically derived from vegetable sources through a chemical reaction with glycerin. It provides stability, texture, and consistency to formulations. Its main function is to allow oil and water to mix.
Caprylyl Glycol
Est. %0.3
Function
Origin
Caprylyl GlycolAn emollient that improves product spreadability and offers a silky feel on the skin. It also acts as a preservative booster that improves the efficacy of other preservatives. According to the manufacturer, it is also a humectant moisturizer.
PEG-100 Stearate
Est. %0.3
Function
Origin
PEG-100 StearateThis surfactant is more specifically classified as an emulsifier that produces oil-in-water emulsions. PEG-100 stearate can also be used as a cleansing agent.
Coco-Glucoside
Est. %0.3
Function
Origin
Coco-GlucosideA mild cleansing and foaming agent. It can be used on its own as a gentle cleanser in a skin cleansing product or can be combined with more powerful cleansing agents, called anionic surfactants, to make them milder on the skin.
Methylparaben
Est. %0.3
Function
Origin
MethylparabenA preservative that keeps a product unspoiled. There has been a lot of controversy surrounding parabens, although the concentrations found in cosmetic formulations are generally considered to be safe.
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.

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.
Sodium Hyaluronate
Est. %0.3
Function
Origin
Sodium Hyaluronate

A sodium salt of famous hyaluronic acid. A potent humectant that hydrates the skin, supports collagen function, and fills out small wrinkles. Sodium hyaluronate also offers soothing and antioxidant properties.

1,2-Hexanediol
Est. %0.3
Function
Origin
1,2-HexanediolA multi-functional formula helper. It is a well-studied preservtive against bacteria and can help pigments and fragrances disperse evenly in a formula.
Beta-Glucan
Est. %0.3
Function
Origin
Beta-GlucanA special polysaccharide obtained from cereals, mushrooms, yeast, bacteria, and some species of seaweed. It is a promising anti-wrinkle, wound healing, antioxidant, and moisturizing ingredient.
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.