Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

First Aid Beauty Ingrown Hair Pads with BHA & AHA Versus Truly Barbie Bikini Serum

First Aid Beauty Ingrown Hair Pads with BHA & AHA Versus Truly Barbie Bikini Serum What's inside Key Ingredients Benefits Concerns Ingredients Side-by-side Water Polysorbate 20 Glycerin Hamamelis Virginiana Water Glycolic Acid Salicylic Acid Sodium Hydroxide C

First Aid Beauty Ingrown Hair Pads with BHA & AHA Versus Truly Barbie Bikini Serum

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Polysorbate 20

Glycerin

Hamamelis Virginiana Water

Glycolic Acid

Salicylic Acid

Sodium Hydroxide

Camellia Sinensis Leaf Extract

Glycyrrhiza Glabra Root Extract

Chrysanthemum Parthenium Extract

Aloe Barbadensis Leaf Juice

Sodium PCA

Bisabolol

Phenoxyethanol

Potassium Sorbate

Sodium Benzoate

Benzoic Acid

Tetrasodium EDTA

Citric Acid

Water, Polysorbate 20, Glycerin, Hamamelis Virginiana Water, Glycolic Acid, Salicylic Acid, Sodium Hydroxide, Camellia Sinensis Leaf Extract, Glycyrrhiza Glabra Root Extract, Chrysanthemum Parthenium Extract, Aloe Barbadensis Leaf Juice, Sodium PCA, Bisabolol, Phenoxyethanol, Potassium Sorbate, Sodium Benzoate, Benzoic Acid, Tetrasodium EDTA, Citric Acid

Caprylic/Capric Triglyceride

Xanthan Gum

Aluminum Calcium Sodium Silicate

Tocopheryl Acetate

Simmondsia Chinensis Seed Oil

Melaleuca Alternifolia Leaf Oil

Calophyllum Inophyllum Seed Oil

Chamomilla Recutita Flower Extract

Tin Oxide

Parfum

Cinnamal

Water, Glycerin, Caprylic/Capric Triglyceride, Xanthan Gum, Aluminum Calcium Sodium Silicate, Tocopheryl Acetate, Simmondsia Chinensis Seed Oil, Melaleuca Alternifolia Leaf Oil, Calophyllum Inophyllum Seed Oil, Aloe Barbadensis Leaf Juice, Chamomilla Recutita Flower Extract, Tin Oxide, Phenoxyethanol, Parfum, Cinnamal

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.

Aloe Barbadensis Leaf Juice is the filtered, stabilized liquid pressed from the inner gel of the aloe vera leaf.

In cosmetics, it shows up as either soothing active or a water-replacement base. It is roughly 98-99% water and the last 1-2% is an interesting mix of polysaccharides, amino acids, vitamins, minerals, and enzymes.

The polysaccharides do most of the work: they bind water at the skin surface for a light, non-greasy hydration boost. And one of the polysaccharides, glycomannan, is linked to fibroblast stimulation + collagen synthesis. This is also why aloe has such a long track record in wound and burn healing.

This ingredient is also calming with anti-inflammatory and mild antimicrobial activity, making it a great pick for sensitive, irritated, or post-sun skin.

Realistic expectations matter though; the solid evidence is mostly limited to hydration, soothing, and wound support. Deeper claims about anti-aging or sun protection are not well backed, and science reviews note it does not prevent radiation-induced skin injury.

Because it plays well with almost everything, it's commonly used as a base alongside other actives like niacinamide or vitamin C.

Typical usage concentrations range from 0.5% (where hydration benefits already show up) all the way to 90%+ (where it replaces water as the main base).

The safety for this ingredient is well-establish as well. Overall, this is a great supporting ingredient for those who want a boost in hydration.

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.

Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!).

It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome.

On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive.

Another perk of this ingredient is that it stays functional across a wide pH range (3-10).

You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own.

Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU.

Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a preservative at up to 1%, including for children of all ages.

Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon.

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!

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 Side-by-side

  1. 01Water
  2. 02Sodium Lauroyl Sarcosinate
  3. 03Cocamidopropyl Betaine
  4. 04Glycerin
  5. 05Acrylates/Steareth-20 Methacrylate Copolymer
  6. 06PEG-120 Methyl Glucose Dioleate
  7. 07Dipropylene Glycol
  8. 08Camellia Sinensis Leaf Extract
  9. 09Chrysanthemum Parthenium Extract
  10. 10Glycyrrhiza Glabra Root Extract
  11. 11Bisabolol
  12. 12Rosmarinus Officinalis Leaf Extract
  13. 13Allantoin
  14. 14Acrylates/C10-30 Alkyl Acrylate Crosspolymer
  15. 15Panthenol
  16. 16Illite
  17. 17Caprylyl Glycol
  18. 18Potassium Hydroxide
  19. 19Disodium EDTA
  20. 20Mica
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side