Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

Nø Cosmetics All-In Barrier Cream Versus Q + A Collagen Face Cream

Nø Cosmetics All-In Barrier Cream Versus Q + A Collagen Face Cream This barrier-repair moisturizer is formulated around Butyrospermum Parkii Butter and Panthenol to strengthen the skin barrier and calm redness. This anti-aging moisturizer is formulated around

Nø Cosmetics All-In Barrier Cream Versus Q + A Collagen Face Cream

This barrier-repair moisturizer is formulated around Butyrospermum Parkii Butter and Panthenol to strengthen the skin barrier and calm redness.

This anti-aging moisturizer is formulated around Tripeptide-29 to soften the look of wrinkles.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Butyrospermum Parkii Butter

Panthenol

Cetearyl Alcohol

Simmondsia Chinensis Seed Oil

Dicaprylyl Ether

Glycerin

Glyceryl Stearate

Prunus Armeniaca Kernel Oil

C13-15 Alkane

Propanediol

Pentylene Glycol

Cetearyl Olivate

Argania Spinosa Kernel Oil

Diglycerin

Ectoin

Ceramide EOP

Ceramide Ns

Ceramide NP

Ceramide As

Ceramide AP

Cholesterol

Hydrogenated Lecithin

Sucrose Distearate

Heterotheca Inuloides Flower Extract

Dipropylene Glycol

Sorbitan Olivate

Sea Water

Laminaria Digitata Extract

Chlorella Vulgaris Extract

Saccharide Isomerate

Xanthan Gum

Hydroxyacetophenone

Phenoxyethanol

Ethylhexylglycerin

Lactic Acid

Citric Acid

Water, Butyrospermum Parkii Butter, Panthenol, Cetearyl Alcohol, Simmondsia Chinensis Seed Oil, Dicaprylyl Ether, Glycerin, Glyceryl Stearate, Prunus Armeniaca Kernel Oil, C13-15 Alkane, Propanediol, Pentylene Glycol, Cetearyl Olivate, Argania Spinosa Kernel Oil, Diglycerin, Ectoin, Ceramide EOP, Ceramide Ns, Ceramide NP, Ceramide As, Ceramide AP, Cholesterol, Hydrogenated Lecithin, Sucrose Distearate, Heterotheca Inuloides Flower Extract, Dipropylene Glycol, Sorbitan Olivate, Sea Water, Laminaria Digitata Extract, Chlorella Vulgaris Extract, Saccharide Isomerate, Xanthan Gum, Hydroxyacetophenone, Phenoxyethanol, Ethylhexylglycerin, Lactic Acid, Citric Acid

Helianthus Annuus Seed Oil

Theobroma Cacao Seed Butter

Cera Alba

Sodium Stearoyl Glutamate

Sucrose Stearate

Collagen

Tripeptide-29

Magnesium PCA

Lonicera Caprifolium Flower Extract

Lonicera Japonica Flower Extract

Linum Usitatissimum Seed Oil

Zingiber Officinale Root Extract

Olea Europaea Fruit Oil

Coco-Glucoside

Benzyl Alcohol

Coconut Alcohol

Aloe Barbadensis Leaf Juice Powder

Tocopherol

Dehydroacetic Acid

Sodium Hyaluronate

Leuconostoc/Radish Root Ferment Filtrate

Sodium Ascorbyl Phosphate

Water, Helianthus Annuus Seed Oil, Butyrospermum Parkii Butter, Glyceryl Stearate, Theobroma Cacao Seed Butter, Cera Alba, Glycerin, Sodium Stearoyl Glutamate, Sucrose Stearate, Collagen, Tripeptide-29, Lactic Acid, Magnesium PCA, Lonicera Caprifolium Flower Extract, Lonicera Japonica Flower Extract, Linum Usitatissimum Seed Oil, Zingiber Officinale Root Extract, Olea Europaea Fruit Oil, Coco-Glucoside, Benzyl Alcohol, Coconut Alcohol, Aloe Barbadensis Leaf Juice Powder, Tocopherol, Dehydroacetic Acid, Sodium Hyaluronate, Leuconostoc/Radish Root Ferment Filtrate, Sodium Ascorbyl Phosphate, Xanthan Gum, Citric Acid

Reviews

Be the first to review

Alternatives

Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

This ingredient is also known as shea butter. It is a plant-derived extract from the nuts of the Africa shea tree and one of the most well-studied emollients.

Because it has a high concentration of fatty acids (primarily oleic, stearic, and linoleic) it is able to form a protective barrier on the skin's surface. This helps seal in moisture and prevents transepidermal water loss (TEWL).

In vitro research found an increase in skin hydration by 58% and a decrease in TEWL by 37.8% after 24 hours of applying this ingredient (pretty impressive for a single ingredient!).

Besides hydration, shea butter also contains triterpenes that have anti-inflammatory potential. In particule, lupeol cinnamate has shown the highest anti-inflammatory activity in vivo.

Shea butter also contains vitamins A and E which may contribute to antioxidant activity.

While Shea Butter has an SPF rating of about 3-4, it is not a sunscreen replacement.

This ingredient may not be fungal acne safe because its fatty acids fall within the C11-C24 range that the Malassezia yeast can metabolize.

Citric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes.

Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath.

However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products.

Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH.

In skincare formulas, citric acid can:

While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants.

Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations.

Rosacea skin has a lower threshold for acids generally, with 62.5% of rosacea subjects in one study reacting to lactic acid in a sting test. This is why we mark citric acid as a potential rosacea trigger.

However, this ingredient shows up as a pH adjuster or chelator at roughly 0.1-1% in many products. These low levels are unlikely to be an issue for rosacea skin and becomes a potential trigger at exfoliating concentrations (20%). Because everybody's skin is unique, we recommend a patch test if you are unsure.

Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.

Topically, glycerin does several things at once:

Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.

Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.

This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.

Just know very high concentrations (>40%) can feel tacky in low humidity.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Glyceryl Stearate is made by reacting glycerin with stearic acid (typically sourced from plant oils like palm or coconut). It's an emulsifier, emollient, and mild occlusive.

Emulsifiers help ingredients like oil and water stay mixed so your formula stays nicely blended and uniform in texture.

This ingredient is typically used in concentrations between 1-10%. Studies have found it to be non-sensitizing, non-phototoxic, and non-photoallergenic.

A close cousin of this ingredient is Glyceryl Stearate SE ("self-emulsifying"). This just has a small amount of sodium or potassium stearate added so it can emulsify without a co-emulsifier.

Since this ingredient is an ester of a C18 fatty acid, it may not be fungal acne safe. The Malassezia yeast can potentially metabolize within the C11-C24 range.

Fun fact: The human body also creates Glyceryl Stearate naturally.

Lactic Acid is another well-loved alpha hydroxy acid (AHA). It is gentler than glycolic acid but still highly effective.

Its main role is to exfoliate the surface of the skin by loosening the “glue” that holds dead skin cells together. Shedding those old cells leads to smoother, softer, and more even-toned skin.

Because lactic acid molecules are larger than glycolic acid, they don’t penetrate as deeply. This means they’re less likely to sting or irritate, making it a great choice for beginners or those with sensitive skin.

Like glycolic acid, it can:

Lactic acid also acts as a humectant (like hyaluronic acid). It can draw water into the skin to improve hydration and also plays a role in the skin's natural moisturizing factor (NMF) in the form of sodium lactate.

Studies show it can boost ceramide production to strengthen the skin barrier and even help balance the skin’s microbiome.

To get results, choose products with a pH between 3-4.

Lower strengths (5-12%) focus on surface exfoliation; higher strengths (12% and up) can reach deeper in the dermis (deeper, supportive layer) to improve skin texture and firmness over time.

Though it was originally derived from milk, most modern lactic acid used in skincare is vegan. It is made through non-dairy fermentation to create a bio-identical and stable form suitable for all formulations.

When lactic acid shows up near the end of an ingredient list, it usually means the brand added just a tiny amount to adjust the product’s pH.

Legend has it that Cleopatra used to bathe in sour milk to help reduce wrinkles.

Lactic acid is truly a gentle multitasker: it exfoliates, hydrates, strengthens, and brightens. It's a great ingredient for giving your skin a smooth, glowing, and healthy look without the harshness of stronger acids.

Read more about some other popular AHA's here:

Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.

So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.

You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!

Xanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.

On the technical side of things, xanthan gum is a polysaccharide - a combination consisting of multiple sugar molecules bonded together.

Xanthan gum is a pretty common and great ingredient. It is a natural, non-toxic, non-irritating ingredient that is also commonly used in food products.

Similar Comparisons

The reference edit

Ingredients, questions
& further reading.

Connected source records selected through this article’s public topic index.

01

Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Explained

  1. 01Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
  2. 02So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
  3. 03You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated!
  4. 04Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
  5. 05Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
  6. 06Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
  7. 07Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.
  8. 08It’s often used to:
  9. 09Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
  10. 10Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
  11. 11Topically, glycerin does several things at once:
  12. 12Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
  13. 13Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
  14. 14This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
  15. 15Just know very high concentrations (>40%) can feel tacky in low humidity.
  16. 16Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
  17. 17Pentylene Glycol (1,2-pentanediol) is a multitasking little diol with three main roles in a formula:
  18. 18Research on alkanediols (the family pentylene glycol belongs to) show they work by disrupting microbial cell membranes. This disruption helps the primary preservative system in a product work more effectively at lower doses.
  19. 19On the safety side, the Cosmetic Ingredient Review Expert Panel has concluded this ingredient to be safe as used in current cosmetic practices + concentrations.
  20. 20Typical use levels in a formula run about 1-5%.
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side