The Inkey List Tranexamic Acid Serum

Number of Ingredients

More ingredients can mean more potential irritants, but a long list is not automatically worse.

This product: 23 ingredients

Price per Ounce

This compares similar product types using the price and size listed in Airtable.

This product: $15.84 per ounce

Dermatologist’s verdict

Mixed

The Inkey List Tranexamic Acid Serum is gentle and underdosed. 2% sits below the 3 to 5% used in most trials, and the ascorbyl glucoside beside it is weak. Night Treatment oversells it: no retinoid, no exfoliant. Expect help with dullness, not melasma. For melasma, use a 5% serum.

What it is

The Inkey List Tranexamic Acid Serum is a fragrance-free, lightweight pigment serum, around $16 to $18. It is a mild tone product rather than the night treatment its packaging suggests — there is no retinoid and no exfoliating acid in it.

Two actives do the work. Tranexamic acid at 2 percent interrupts a signal that tells pigment cells to switch on, and ascorbyl glucoside at 2 percent is a gentle vitamin C derivative working from a second direction. The rest is water, glycerin and squalane, so it absorbs in seconds and does not sting.

What it does

Pigment is made by melanocytes, cells at the base of the outer layer that pass melanin up to the cells above. Surrounding skin cells send them chemical messages to start, and ultraviolet light and inflammation trigger those messages. Most tone products either block the enzyme that makes melanin or interrupt the message.

Tranexamic acid works on the message. It blocks plasmin activity in skin cells, cutting one of the signals telling melanocytes to produce. It does not remove pigment already in the skin; that has to shed off over months.

The Inkey List Tranexamic Acid Serum delivers 2 percent, plus 2 percent ascorbyl glucoside, a vitamin C derivative that slows the pigment enzyme from the other side. Both are mild, and 2 percent sits below the 3 to 5 percent used in most trials, so this is a gentle nudge rather than a treatment.

What it treats

## Hyperpigmentation | Moderate Pigment cells sit at the base of the outer layer and hand melanin up to the cells above. Tranexamic acid blocks part of the message that starts them, so it slows new pigment rather than bleaching what is there. The mildest way to test whether that helps your skin.

## Post-Inflammatory Hyperpigmentation | Limited Marks left by acne or a rash come from inflammation switching pigment cells on, so a product that irritates makes them worse. Neither active here is likely to provoke anything.

## Melasma | Limited Melasma does respond to tranexamic acid in the research, but most of those studies used 3 to 5 percent. This is 2 percent, so treat it as a starting point alongside daily sunscreen, not a melasma treatment.

## Sensitive Skin | Good fit Neither active needs a low, stinging pH to work, and the ingredient list is short and fragrance-free. If retinoids and acids have all failed you, this is a low-risk way to work on tone.

Best for

**The dose is on the low side:** 2% is the low end of what has been studied. Most trials of topical tranexamic acid used 3–5%. This is likelier to help mild dullness than genuine melasma.

**The name promises more than it holds:** "Night Treatment" oversells it. There is no retinoid and no exfoliant in here.

**The vitamin C form is weak:** ascorbyl glucoside is a weak derivative. Do not expect meaningful antioxidant or collagen benefit from 2% of it.

**Results are slow and small:** results are slow and subtle, which reviewers consistently report.

Texture

Serum A thin, clear serum that absorbs in a few seconds and leaves nothing on the surface.

It does not sting or tingle, and it should not, because neither active needs an acidic pH to work.

It is fragrance-free and has no scent of its own. It layers under moisturizer, sunscreen and makeup without pilling.

How to use it

## How to use it How much: A few drops over the whole face, not dotted onto spots. Pigment fades as a broad area, not spot by spot. Layering: Straight onto clean skin, before moisturizer. It does not clash with retinoids, niacinamide or acids. Careful: Daily sunscreen does most of the work on pigment. Ultraviolet light is the switch that turns pigment cells on, so without it you are undoing your own work. What to expect: Three months before you can judge it, and the change will be subtle. At 2 percent this is the low end of the studied range, so mild dullness responds better than deep patches.

Full ingredient list

Water, Butylene Glycol, Glycerin, Ascorbyl Glucoside, Tranexamic Acid, Euterpe Oleracea Fruit Extract, 1-Methylhydantoin-2-Imide, Sodium Acrylates Copolymer, Phenoxyethanol, Carbomer, Sodium Hydroxide, Cetearyl Olivate, Benzyl Alcohol, Sorbitan Olivate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Lecithin, Squalane, Ethylhexylglycerin, Sodium Gluconate, Polysorbate 60, Dehydroacetic Acid, Lactobacillus Ferment, Sorbitan Isostearate

The rest of the line

AXIS: Strongest on dark spots | Gentlest

The Inkey List sells several single-active serums that all promise a more even tone. They are not equally strong.

**Advanced 0.2% Retinal Serum | the-inkey-list-advanced-0-2-percent-retinal-serum** — Retinal, a fast-acting vitamin A. The strongest here for marks and texture, and the most irritating.

**15% Vitamin C + EGF Serum | the-inkey-list-15-percent-vitamin-c-plus-egf-serum** — Pure vitamin C at a working strength. Brightening, and far more likely to sting than a derivative.

**Glycolic Acid Toner | the-inkey-list-glycolic-acid-toner** — Exfoliates the surface, fading old marks slowly.

**10% Niacinamide Serum | the-inkey-list-10-percent-niacinamide-serum** — Aimed at oil and redness. It helps tone a little, and very few people react.

**Tranexamic Acid Serum (this one)** — 2% tranexamic acid with a gentle vitamin C derivative. The mildest option, and a reasonable place to start.

Similar products

These are the options if you want a higher dose. Gentle is a fair reason to start here, not to stay.

Tranexamic Acid 5% Serum with Niacinamide 5% | more | 5% is the dose most topical research used, with 5% niacinamide for under $20. The sensible step up from 2%. Naturium Tranexamic Topical Acid | more | 5% tranexamic acid with kojic acid, niacinamide and licorice root for about $20. Kojic acid can sensitize. SkinCeuticals Discoloration Defense Serum | less | 3% tranexamic acid with niacinamide and kojic acid at $115, with no head-to-head trial against cheaper serums at the same dose.

Key facts

Key active: Tranexamic acid 2% + ascorbyl glucoside 2% Texture: Lightweight serum Best for: Mild dark spots and dullness Approximate price: $16–$18 Fragrance: Fragrance free Size: 1.01 oz Price: $19.00 Type: Serum

Questions patients ask

Will The Inkey List Tranexamic Acid Serum treat melasma? Unlikely. At 2% it is the low end, better for mild dullness.

Do I need sunscreen with The Inkey List Tranexamic Acid Serum? Yes. Pigment is driven by light, so daily SPF is essential.

Is The Inkey List Tranexamic Acid Serum a strong night treatment? No. Despite the name, no retinoid and no exfoliant.

Is The Inkey List Tranexamic Acid Serum fragrance-free? Yes.

Is The Inkey List Tranexamic Acid Serum good for beginners? Yes. Cheap, gentle and low-risk to try.

References

1. Topical Treatments for Melasma and Their Mechanism of Action (https://pmc.ncbi.nlm.nih.gov/articles/PMC9122278/) — Explains that tranexamic acid works via the plasminogen/plasmin pathway (reducing melanogenic factors) and is well tolerated, and that ascorbic acid (vitamin C) is an effective adjuvant for melasma, supporting the page's mechanism and low-irritation claims. 2. Topical and Systemic Therapies in Melasma: A Systematic Review (https://pmc.ncbi.nlm.nih.gov/articles/PMC10718129/) — States that further large-scale studies are needed to establish the efficacy of topical vitamin C and topical tranexamic acid, while oral TXA has a strong recommendation, backing the claim that a low-dose topical is at the weak end of the evidence for genuine melasma. 3. Effects of ascorbic acid on gingival melanin pigmentation in vitro and in vivo (https://pubmed.ncbi.nlm.nih.gov/19186973/) — Shows that ascorbic acid 2-glucoside (ascorbyl glucoside), a stable vitamin C derivative, inhibits tyrosinase activity and melanin formation and reduces pigmentation in a controlled clinical trial, supporting ascorbyl glucoside's anti-pigment action. 4. Comparative study between topical tranexamic acid alone versus its combination with autologous platelet rich plasma for treatment of melasma (https://doi.org/10.1080/09546634.2020.1781755) — A melasma trial using topical tranexamic acid at 5% that notes topical TXA formulations have limited efficacy, supporting the page's point that most topical TXA trials used higher concentrations (3-5%) than the product's 2%. 5. Melasma treatment: a systematic review (https://doi.org/10.1080/09546634.2021.1914313) — Describes melasma as a chronic, refractory pigmentation disorder with high recurrence and no single universally effective treatment, supporting the caution that a gentle 2% serum is likelier to help mild dullness than genuine melasma. 6. The Inkey List Tranexamic Acid Serum (product page) (https://www.theinkeylist.com/products/tranexamic-acid-night-treatment) — Confirms the product's formulation (2% tranexamic acid + 2% ascorbyl glucoside), its $19 / 30ml price, and that it was formerly sold as a Night Treatment, supporting the price, formulation, and naming facts on the page.