Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

First Aid Beauty Brighten + Glow Facial Radiance Pads With Glycolic + Lactic Acids Versus Thayers Astringent Pads

First Aid Beauty Brighten + Glow Facial Radiance Pads With Glycolic + Lactic Acids Versus Thayers Astringent Pads This smoothing exfoliating pad uses a pre-saturated pad with Lactic Acid and Glycolic Acid to refine skin texture and brighten dull-looking skin.

First Aid Beauty Brighten + Glow Facial Radiance Pads With Glycolic + Lactic Acids Versus Thayers Astringent Pads

This smoothing exfoliating pad uses a pre-saturated pad with Lactic Acid and Glycolic Acid to refine skin texture and brighten dull-looking skin.

This toner pad uses a pre-saturated pad to apply its treatment formula.

What's inside

Key Ingredients

No key ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Aloe Barbadensis Leaf Juice

Cucumis Sativus Fruit Water

Lactic Acid

Glycolic Acid

Hyaluronic Acid

Phyllanthus Emblica Fruit Extract

Citrus Limon Peel Extract

Citrus Nobilis Fruit Extract

Glycerin

Polysorbate 20

Phenoxyethanol

Potassium Sorbate

Sodium Benzoate

Citric Acid

Chlorphenesin

Sodium Hydroxide

Water, Aloe Barbadensis Leaf Juice, Cucumis Sativus Fruit Water, Lactic Acid, Glycolic Acid, Hyaluronic Acid, Phyllanthus Emblica Fruit Extract, Citrus Limon Peel Extract, Citrus Nobilis Fruit Extract, Glycerin, Polysorbate 20, Phenoxyethanol, Potassium Sorbate, Sodium Benzoate, Citric Acid, Chlorphenesin, Sodium Hydroxide

Sd Alcohol 40-B

Parfum

Hamamelis Virginiana Extract

Caprylyl Glycol

Ethylhexylglycerin

Potassium Hydroxide

Water, Sd Alcohol 40-B, Glycerin, Parfum, Hamamelis Virginiana Extract, Aloe Barbadensis Leaf Juice, Phenoxyethanol, Caprylyl Glycol, Ethylhexylglycerin, Citric Acid, Potassium Hydroxide

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.

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.

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 Explained

  1. 01This ingredient is also known as castor oil. It is a skin conditioning ingredient.
  2. 02The star component of castor oil is ricinoleic acid, an unusual fatty acid that makes up ~80-92% of its composition.
  3. 03In skincare, it is an emollient that dries down to a solid film with water-binding properties. This helps keep skin hydrated and helps reduce transepidermal water loss (TEWL).
  4. 04A 2026 dermatology review pulls together its broader uses:
  5. 05Human clinical testing found this ingredient to be non-irritating and non-sensitizing.
  6. 06Because castor oil contains fatty acids in the C11-24 range, this ingredient may not be fungal acne safe.
  7. 07At this time, the literature does not support castor oil in regrowing hair. A 2022 systematic review found no strong evidence that it supports hair growth and only weak evidence that it improves hair shine.
  8. 08Castor oil itself carries "perfuming" and "masking" function tags according to the official CosIng database. This is because of its mild odor and odor-dampening properties.
  9. 09Bis-Diglyceryl Polyacyladipate-2 is a synthetic emollient that works as a lanolin substitute.
  10. 10This ingredient is a great vegan option for those avoiding animal-derived ingredients.
  11. 11It mostly stays on the surface of skin where it helps hydrate due to its large molecular size and low water solubility.
  12. 12Due to it being derived from fatty acids, this ingredient may not be Malassezia or fungal acne safe.
  13. 13Jojoba oil is one of the most well-studied plant-derived ingredients in cosmetics. It is an emollient with a special structure.
  14. 14Because it is made up of 97-98% wax esters, it closely mirrors the linear monoesters found in human sebum. This makes it skin compatible, non-greasy, and lightweight.
  15. 15Unlike other plant oils, jojoba wax doesn't easily penetrate skin. It mostly works in the uppermost layers as an emollient. This just means it forms a light barrier on the skin to help retain moisture.
  16. 16Formulations with jojoba esters up to 90% reduced transepidermal water loss (TEWL) and increased barrier recovery by 81% (outperforming bisabolol at 47%).
  17. 17Besides barrier support, the science also suggests jojoba to have anti-inflammatory effects and potential applications for skin infections, aging, and wound healing.
  18. 18Fun fact: Indigenous cultures have used jojoba as a moisturizer and to help treat burns for centuries.
  19. 19Fungal acne: The Malassezia yeast is known to metabolize fatty acids in the C11-24 range and jojoba's dominant fatty acid components fall into this range. This ingredient may not be fungal acne safe.
  20. 20Euphorbia Cerifera Wax (aka candelilla wax) is a vegan stand-in for beeswax. It is a plant-derived wax that functions as an astringent, emulsion stabilizer, film-former, and skin conditioner.
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side