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Tula Skincare Brightening Treatment Drops Triple Vitamin C Serum Versus Paula's Choice C15 Super Booster

Tula Skincare Brightening Treatment Drops Triple Vitamin C Serum Versus Paula's Choice C15 Super Booster This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Lactococcus Ferment Lysate to brighten dull-looking skin and fade the look of dark

By Peptide Skincare & Beauty Editorial TeamPublished

Tula Skincare Brightening Treatment Drops Triple Vitamin C Serum Versus Paula's Choice C15 Super Booster

This brightening serum is formulated around 3-O-Ethyl Ascorbic Acid and Lactococcus Ferment Lysate to brighten dull-looking skin and fade the look of dark spots.

This brightening serum is formulated around Ascorbic Acid and Ferulic Acid to brighten dull-looking skin and soften the look of wrinkles.

What's inside

Key Ingredients

Benefits

Concerns

No concerns

Ingredients Side-by-side

Water

3-O-Ethyl Ascorbic Acid

Lactococcus Ferment Lysate

Propanediol

1,2-Hexanediol

Ascorbyl Glucoside

Sodium Citrate

Pentylene Glycol

Cichorium Intybus Root Extract

Melia Azadirachta Leaf Extract

Melia Azadirachta Flower Extract

Corallina Officinalis Extract

Curcuma Longa Root Extract

Ocimum Basilicum Flower/Leaf Extract

Lactic Acid

Ocimum Sanctum Leaf Extract

Vaccinium Vitis-Idaea Fruit Extract

Citrus Unshiu Peel Extract

Hippophae Rhamnoides Fruit Extract

Litchi Chinensis Seed Extract

Mangifera Indica Leaf Extract

Gold

Glutathione

Hydroxyacetophenone

Acetyl Cysteine

Sodium Sulfite

Sorbitol

Citric Acid

Sclerotium Gum

Xanthan Gum

Caprylyl Glycol

Ascorbic Acid

Sodium Phytate

Lecithin

Pullulan

Silica

Sodium Chloride

Sodium Benzoate

Water, 3-O-Ethyl Ascorbic Acid, Lactococcus Ferment Lysate, Propanediol, 1,2-Hexanediol, Ascorbyl Glucoside, Sodium Citrate, Pentylene Glycol, Cichorium Intybus Root Extract, Melia Azadirachta Leaf Extract, Melia Azadirachta Flower Extract, Corallina Officinalis Extract, Curcuma Longa Root Extract, Ocimum Basilicum Flower/Leaf Extract, Lactic Acid, Ocimum Sanctum Leaf Extract, Vaccinium Vitis-Idaea Fruit Extract, Citrus Unshiu Peel Extract, Hippophae Rhamnoides Fruit Extract, Litchi Chinensis Seed Extract, Mangifera Indica Leaf Extract, Gold, Glutathione, Hydroxyacetophenone, Acetyl Cysteine, Sodium Sulfite, Sorbitol, Citric Acid, Sclerotium Gum, Xanthan Gum, Caprylyl Glycol, Ascorbic Acid, Sodium Phytate, Lecithin, Pullulan, Silica, Sodium Chloride, Sodium Benzoate

Dipropylene Glycol

Glycerin

Ethoxydiglycol

Sodium Hydroxide

PPG-26-Buteth-26

PEG-40 Hydrogenated Castor Oil

Bisabolol

Ferulic Acid

Decylene Glycol

Tocopherol

Sphingomonas Ferment Extract

Phenoxyethanol

Water, Ascorbic Acid, Dipropylene Glycol, Propanediol, Glycerin, Ethoxydiglycol, Sodium Hydroxide, PPG-26-Buteth-26, PEG-40 Hydrogenated Castor Oil, Bisabolol, Ferulic Acid, Sodium Phytate, Decylene Glycol, Tocopherol, 1,2-Hexanediol, Sphingomonas Ferment Extract, Phenoxyethanol

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Alternatives

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

Ascorbic Acid is is pure Vitamin C and is the biologically active form used directly by skin.

Not only is vitamin C great for your overall health and immune system, but it also has plenty of benefits for your skin. It is best supported by academic literature for:

Topical vitamin C has been shown to help neutralize oxidative stress from UV and pollution, helping to improve photoaging and hyperpigmentation when used consistently.

One clinical study found that using 5% topical vitamin C for six months improved signs of photodamaged skin, both on the surface and in the deeper structural layers of the skin.

While vitamin C doesn’t replace sunscreen, studies show it can boost photoprotection when combined with Vitamin E and ferulic acid. These two ingredients help improve stability and protective effects.

The big downside of this ingredient is formulation difficulty. Vitamin C is prone to oxidation and doesn't penetrate the skin unless formulated correctly. Research found that vitamin C absorbs into the skin best at a low pH (< 3.5) with about 20% being the upper limit for effective absorption.

Skin levels can saturate after repeated application; this means your skin won’t keep absorbing more once it’s full of vitamin C. This is why more isn’t always better with vitamin C and why very high concentrations don’t necessarily give extra benefits.

Ascorbic acid generally works well with many skincare ingredients but can be irritating when combined with other active ingredients. Strong oxidizing acne treatments like benzoyl peroxide can reduce the effectiveness of vitamin C if they are used at the same time; they are often recommended for use at different times of day.

Read more about other types of Vitamin C:

Foods rich with vitamin C include oranges, strawberries, broccoli, bell peppers, and more. When consuming Vitamin C, your skin receives a portion of the nutrients.

Propanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.

It’s often used to:

Propanediol 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.

Sodium Phytate is the synthetic salt form of phytic acid. Phytic acid is an antioxidant and can be found in plant seeds.

Sodium Phytate is a chelating agent. Chelating agents help prevent metals from binding to water. This helps stabilize the ingredients and the product.

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!

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The reference edit

Ingredients, questions
& further reading.

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

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Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Explained

  1. 01These ingredients are found in both products.
  2. 02Ingredients higher up in an ingredient list are typically present in a larger amount.
  3. 03Allantoin is a soothing ingredient known for its protective and moisturizing properties; it's basically a quiet workhorse ingredient you can find in a huge range of cosmetics.
  4. 04Though it can be derived from the comfrey plant, allantoin is produced synthetically for cosmetic products to ensure purity.
  5. 05Research shows it can encourage your skin cells to turn over and renew by stimulating keratinocyte and fibroblast proliferation.
  6. 06It also has mild keratolytic properties to help loosen and shed dead skin cells without being harsh.
  7. 07Studies also suggest allantoin can help calm inflammation by dialing down some of the chemical signals your skin sends out when it is irritated.
  8. 08This ingredient is typically used in the 0.1-0.5% range, and the FDA recognizes it as a skin protectant in OTC products up to 2%.
  9. 09Overall, allantoin is a wonderful addition to most routines; it is stable across a wide pH range (~4-8), works well with other ingredients, and is considered non-sensitizing/non-irritating.
  10. 10Fun fact: Allantoin is naturally occurring in comfrey root, beets, chamomile, and wheat sprouts. Our bodies even produce it as a byproduct of uric acid metabolism.
  11. 11Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
  12. 12Topically, glycerin does several things at once:
  13. 13Your 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.
  14. 14Aquaporin-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.
  15. 15This 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.
  16. 16Just know very high concentrations (>40%) can feel tacky in low humidity.
  17. 17Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
  18. 18Glyceryl 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.
  19. 19Emulsifiers help ingredients like oil and water stay mixed so your formula stays nicely blended and uniform in texture.
  20. 20This ingredient is typically used in concentrations between 1-10%. Studies have found it to be non-sensitizing, non-phototoxic, and non-photoallergenic.
Source · skinsort.com ⟶
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