K-Secret Seoul 1988 Serum Retinal Liposome 2% + Black Ginseng Versus Cos De BAHA Retinol 2.5% Facial Serum With Vitamin E
Updated on May 18, 2025
Overview
What they are
These products are both cruelty-free and reef safe serums. They have a total of 3 ingredients in common
Cool Features
They both contain niacinamide, retinoid and Vitamin E
Suited For
They're both likely to be good for fighting acne, anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any harsh alcohols, fragrances, parabens, silicones or sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
K-Secret Seoul 1988 Serum Retinal Liposome 2% + Black Ginseng 41 ingredients
Cos De BAHA Retinol 2.5% Facial Serum With Vitamin E 14 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
K-Secret Seoul 1988 Serum Retinal Liposome 2% + Black Ginseng 41 ingredients
Cos De BAHA Retinol 2.5% Facial Serum With Vitamin E 14 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservatives
Niacinamide is a multitasking form of vitamin B3 that strengthens the skin barrier, reduces pores and dark spots, regulates oil, and improves signs of aging.
And the best part? It's gentle and well-tolerated by most skin types, including sensitive and reactive skin.
You might have heard of "niacin flush", or the reddening of skin that causes itchiness. Niacinamide has not been found to cause this.
In very rare cases, some individuals may not be able to tolerate niacinamide at all or experience an allergic reaction to it.
If you are experiencing flaking, irritation, and dryness with this ingredient, be sure to double check all your products as this ingredient can be found in all categories of skincare.
When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration.
When you apply niacinamide to your skin, your body converts it into nicotinamide adenine dinucleotide (NAD). NAD is an essential coenzyme that is already found in your cells as "fuel" and powers countless biological processes.
In your skin, NAD helps repair cell damage, produce new healthy cells, support collagen production, strengthen the skin barrier, and fight environmental stressors (like UV and pollution).
Our natural NAD levels start to decline with age, leading to slower skin repair, visible aging, and a weaker skin barrier. By providing your skin niacinamide, you're recharging your skin's NAD levels. This leads to stronger, healthier, and younger looking skin.
Another name for vitamin B3 is nicotinamide. This vitamin is water-soluble and our bodies don't store it. We obtain Vitamin B3 from either food or skincare. Meat, fish, wheat, yeast, and leafy greens contain vitamin B3.
The type of niacinamide used in skincare is synthetically created.
Learn more about NiacinamideDisodium EDTA plays a role in making products more stable by aiding other preservatives.
It is a chelating agent, meaning it neutralizes metal ions that may be found in a product.
Disodium EDTA is a salt of edetic acid and is found to be safe in cosmetic ingredients.
Learn more about Disodium EDTAIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
K-Secret Seoul 1988 Serum Retinal Liposome 2% + Black Ginseng 41 ingredients
Cos De BAHA Retinol 2.5% Facial Serum With Vitamin E 14 ingredients


Reviews
Here's what our community thinks
K-Secret Seoul 1988 Serum Retinal Liposome 2% + Black Ginseng 41 ingredients
Worked almost right away, by smoothing my skin, giving me smaller pores and improved fine lines. Definitely a staple.
been struggling a lot with closed comedones and acne. this product has helped reduced that and improves texture pretty fast
EDIT: i used it for 4 months and while it did get rid of cc and hormonal acne, I noticed that any pimples that remained on my face was fungal acne (i used to struggle with fa in highschool but haven't in 5 yrs) i know the product is not fa safe but most otc retinoids Show more
Cos De BAHA Retinol 2.5% Facial Serum With Vitamin E 14 ingredients
UPDATE: their homepage actually says that it’s not retinol 2.5% but only 0.13%. That low percentage does nothing for your skin 😂 For me it’s misleading advertising and I have read they do that a lot with their products. Hence I m not buying anything more from them. Also in Germany a product that contains over 1% Retinol is considered medical care and usually needs prescription (EU regulations). So Show more
This was genuinely one of those products that I'm not sure if I noticed any results. Aside from the uncertainty of this product and the ingredients. I also did not enjoy the consistency of this serum. It felt as if it never fully absorbed and made my skin feel rather oily. Not sure about the other products from this brand, but I feel unlikely to repurchase this.