The INKEY List Vitamin C Serum Versus Nip + Fab Vitamin C Fix Tonic

The INKEY List Vitamin C Serum Versus Nip + Fab Vitamin C Fix Tonic

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

This brightening toner is formulated around Lactic Acid and Ascorbic Acid to brighten dull-looking skin and refine skin texture.

What's inside

Key Ingredients

Benefits

Concerns

No concerns

Ingredients Side-by-side

Dimethicone

Ascorbic Acid 30%

Polysilicone-11

PEG-10 Dimethicone

Dimethicone, Ascorbic Acid 30%, Polysilicone-11, PEG-10 Dimethicone

Water

Glycerin

Butylene Glycol

Lactic Acid

Polysorbate 20

Phenoxyethanol

Ascorbic Acid

Benzyl Alcohol

Sodium Hydroxide

Parfum

Disodium EDTA

Panthenol

Sodium Sulfite

Ethylhexylglycerin

1-Methylhydantoin-2-Imide

Dehydroacetic Acid

Limonene

Camellia Sinensis Leaf Extract

Coffea Arabica Seed Extract

Euterpe Oleracea Fruit Extract

Garcinia Mangostana Fruit Extract

Hydrolyzed Lycium Barbarum Fruit Extract

Morinda Citrifolia Fruit Extract

Punica Granatum Fruit Juice

Water, Glycerin, Butylene Glycol, Lactic Acid, Polysorbate 20, Phenoxyethanol, Ascorbic Acid, Benzyl Alcohol, Sodium Hydroxide, Parfum, Disodium EDTA, Panthenol, Sodium Sulfite, Ethylhexylglycerin, 1-Methylhydantoin-2-Imide, Dehydroacetic Acid, Limonene, Camellia Sinensis Leaf Extract, Coffea Arabica Seed Extract, Euterpe Oleracea Fruit Extract, Garcinia Mangostana Fruit Extract, Hydrolyzed Lycium Barbarum Fruit Extract, Morinda Citrifolia Fruit Extract, Punica Granatum Fruit Juice

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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.

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.

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