Isntree C Niacin Toning Ampoule Serum 50ml

Isntree C Niacin Toning Ampoule builds its brightening case around 3-O-ethyl ascorbic acid, a more stable vitamin C derivative than pure ascorbic acid, and pairs it with niacinamide so the two work the same angle from different directions. Sea buckthorn fruit extract and turmeric root extract back them up, while bioflavonoids and broccoli extract add further antioxidant support across a formula that leans concentrated rather than watered down.

Why You'll Love It

• 3-O-ethyl ascorbic acid offers a brightening angle without the instability and yellowing issues of pure vitamin C.
• Niacinamide and turmeric root extract work alongside the vitamin C derivative for a fuller brightening approach.
• Panthenol, allantoin and beta-glucan keep the ampoule from feeling drying, a common issue with vitamin C serums.
• Concentrated enough to function as a genuine targeted step rather than a diluted extra.
• Aloe leaf extract and sodium hyaluronate add comfort so the actives do not feel harsh on application.

Key Ingredients

• 3-O-Ethyl Ascorbic Acid: a stable vitamin C derivative chosen for brightening without the oxidation issues of pure ascorbic acid.
• Niacinamide: works alongside the vitamin C derivative to support a more even looking complexion.
• Hippophae Rhamnoides (Sea Buckthorn) Fruit Extract: an antioxidant rich botanical that reinforces the brightening focus of the formula.

Full Ingredients (INCI)

Hippophae Rhamnoides Fruit Extract, Butylene Glycol, Pentylene Glycol, Glycerin, Betaine, Water, Niacinamide, Propanediol, Aloe Barbadensis Leaf Extract, Melia Azadirachta Flower Extract, Melia Azadirachta Leaf Extract, Cucurbita Pepo (Pumpkin) Fruit Extract, Physalis Alkekengi Fruit Extract, Sodium Hyaluronate, Dipotassium Glycyrrhizate, Ocimum Sanctum Leaf Extract, Beta-Glucan, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Brassica Oleracea Italica (Broccoli) Extract, Coccinia Indica Fruit Extract, Moringa Oleifera Seed Oil, Boswellia Serrata Resin Extract, Bioflavonoids, Panthenol, Allantoin, Sodium Polyacrylate, Ammonium Acryloyldimethyltaurate/VP Copolymer, 3-O-Ethyl Ascorbic Acid, Ethyl Hexanediol, Polysorbate 80, 1,2-Hexanediol.

How to Use

Take 2 to 3 drops onto your palm and apply across the face, patting gently until absorbed. Use morning or evening as a targeted step before moisturiser. If used in the morning, follow with a broad spectrum sunscreen, since brightening actives are best supported by daily sun protection.

Suitable For

Skin looking to address dullness or uneven tone with a vitamin C led ampoule, including skin that has found pure ascorbic acid serums too irritating or unstable in the past.

About Brand

Isntree is a Korean skincare brand made in South Korea, formulating its ampoule range around considered active ingredient choices rather than headline concentrations alone. Ingredient transparency runs across the whole brand. See more from the range in our Isntree collection.

FAQ

Q: What is 3-O-ethyl ascorbic acid and how is it different from vitamin C?
Ans: It is a more stable derivative of vitamin C that is less prone to oxidising and turning yellow over time compared with pure ascorbic acid, while still offering a brightening benefit.

Q: Can I use this ampoule with niacinamide products already in my routine?
Ans: Yes, niacinamide is already included in this formula, so it is designed to work as a complete brightening step rather than needing a separate niacinamide product layered on top.

Q: Do I need sunscreen when using this ampoule?
Ans: Daily sunscreen is recommended whenever a brightening active is part of your morning routine, to support and protect the results over time.

Q: How many drops should I use per application?
Ans: Two to three drops is generally enough to cover the full face, applied as a targeted step before moisturiser.

Q: Is this ampoule suitable for sensitive skin?
Ans: Panthenol, allantoin and beta-glucan are included to support comfort, though as with any active ampoule, sensitive skin should patch test before regular use.