First Aid Beauty Brighten + Glow Bronzing Drops with Niacinamide vs Kiehl's Ultra Pure High-Potency Serum with 5.0% Niacinamide

First Aid Beauty

Kiehl's

A serum built around Niacinamide and Vitamin E, for barrier repair and pollution defence.

A serum built around Niacinamide and Hyaluronic acid, for hydration and barrier repair.

Serum

18 ingredients

10 ingredients

Brand price

USD 28.00 · checked 26 Sept 2026 · brand's site

Brand price

INR 3200.00 · checked 8 Oct 2026 · brand's site

No retailer listed yet

At a Glance

They come out differently on Fungal-acne-safe and Cruelty-free; those rows are shaded. Tap any answer to see why.

Hyaluronic acid1
Hyaluronic acid and its salts; a humectant that binds water to the skin.
Sodium Hyaluronate
Niacinamide1
Vitamin B3 — supports the barrier and evens tone.
Niacinamide

Hydrating2
Boosts hydration and relieves dry, tight skin.
Caprylic/Capric Triglyceride, Glycerin
Barrier Repair4
Strengthens and restores the skin's natural barrier.
Caprylic/Capric Triglyceride, Caprylyl Glycol, Glycerin, Niacinamide
Redness Reducing1
Soothes visible redness and calms irritation.
Niacinamide
Smoothing2
Refines rough or uneven texture.
Caprylyl Glycol, Niacinamide

Hydrating4
Boosts hydration and relieves dry, tight skin.
Glycerin, Methyl Gluceth-20, Propanediol, Sodium Hyaluronate
Barrier Repair3
Strengthens and restores the skin's natural barrier.
Caprylyl Glycol, Glycerin, Niacinamide
Redness Reducing1
Soothes visible redness and calms irritation.
Niacinamide
Smoothing2
Refines rough or uneven texture.
Caprylyl Glycol, Niacinamide

May Trigger Acne1
Can clog pores or trigger breakouts.
Sorbitan Isostearate
May Worsen Seborrheic Dermatitis1
May feed the yeast involved in seborrheic dermatitis.
Sorbitan Isostearate
May Worsen Keratosis Pilaris1
May clog follicles or strip skin prone to keratosis pilaris.
Sorbitan Isostearate

No concerns found

Show highlights for:

Aqua (in both products)
Solvent
0 / —
Caprylic/Capric Triglyceride
Occlusive
1 / 1
Niacinamide (in both products)
Smoothing
0 / —
- Niacinamide
- Acne Fighting
- Barrier Repair
- Brightening
- Dark Spots
- Even Tone
- Oil Control
- Pore Refining
- Redness Reducing
Pentylene Glycol
Skin Conditioning
0-1 / —
Glycerin (in both products)
Humectant
0 / 0
- Possibly animal-derived
- Hydrating
Mica
Colorant
0-1 / —
Terminalia Ferdinandiana Fruit Extract
Antioxidant
Tocopheryl Acetate
Antioxidant
0 / 0
- Vitamin E
- Antioxidant
Caprylyl Glycol (in both products)
Emollient
0-1 / —
Sorbitan Isostearate
Emulsifying
1-2 / 0
- Fatty esters (glyceryl stearate, PEG-100 stearate)
- May Trigger Acne
- May Worsen Keratosis Pilaris
- May Worsen Seborrheic Dermatitis

Aqua (in both products)
Solvent
0 / —
Niacinamide (in both products)
Smoothing
0 / —
- Niacinamide
- Acne Fighting
- Barrier Repair
- Brightening
- Dark Spots
- Even Tone
- Oil Control
- Pore Refining
- Redness Reducing
Glycerin (in both products)
Humectant
0 / 0
- Possibly animal-derived
- Hydrating
Propanediol
Viscosity Controlling
0-1 / —
- Hydrating
Methyl Gluceth-20
Humectant
Hydroxyacetophenone
Antioxidant
Sodium Hyaluronate
Humectant
0 / 0
- Hyaluronic acid
- Hydrating
Caprylyl Glycol (in both products)
Emollient
0-1 / —
Carbomer
Gel Forming
1 / 0
Sodium Hydroxide
Buffering
0 / —

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Aqua
Solvent
Water
Learn more about Aqua →
Niacinamide
Smoothing
Niacinamide is niacinamide.
Learn more about Niacinamide →
Glycerin
Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care, Perfuming, Humectant, Skin Protecting, Solvent, Viscosity Controlling
Glycerin may be plant, synthetic or animal depending on the supplier.
Learn more about Glycerin →
Caprylyl Glycol
Deodorant, Hair Conditioning, Skin Conditioning, Emollient
Caprylyl Glycol is the diol that conforms to the formula
Learn more about Caprylyl Glycol →