Look, at this point, you don't need us to preach the benefits of vitamin C in your skincare regime.

You know that it's one of the most powerful ingredients for fighting the effects of free radicals on the face, for slowing ageing (if that's a priority for you), for repairing damaged skin cells, for calming pigmentation and for reducing scarring.

After all, at this point it's practically common knowledge. 'It was one of the most searched-for ingredients in 2021, and it's not hard to see why,' says Dr Aikaterini Charakida, Consultant Dermatologist & Dermato-Surgeon at EF Medispa.

But here's the thing: spending tonnes of your hard-earned ...overdraft...on vitamin C supplies absolutely goddamn pointless if you're not doing it right. Because, despite incredible benefits, there are a few stumbling blocks along the path to glowing, revitalised skin.

Here's what to watch out for when investing in vitamin C.

Badly packaged products

Sure, never judge a book by the cover, but you can sometimes judge how well a vitamin C product will work for you by its bottle. You might have heard about 'stability' when looking into vitamin C. That's because vitamin C degrades and breaks down over time with exposure to light and air in the outside world, becoming less effective.

'Things that help are a dark bottle [and] airtight containers.' Says Dr Ifeoma Ejikeme, General Medicine Consultant and Expert Aesthetic Physician and CeraVe's resident expert.

Dr Charakida also recommends products kept in airtight packaging. On top of this, she recommends opting for vitamin C products used once daily only, to avoid excessive air exposure.

On the note of stability - some forms of vitamin C are more stable and beneficial than others. For example, you might see vitamin C referred to as 'ascorbic acid' in skincare. To paraphrase Paula Begoun, founder of Paula's Choice - this is currently the most well-researched and stable form of vitamin C.

Along with ascorbic acid, Paula recommends the following derivative forms of vitamin C, (as long as they're appearing alongside ingredients like green tea, niacinamide and retinol):

  • Sodium ascorbic phosphate
  • Ascorbic palmitate
  • Retinyl ascorbate
  • Tetrahexyldecyl ascorbate
  • Magnesium ascorbic phosphate

Incorrect storage

Your packaging may go some way to protect your vitamin C product from degradation, but as advised by Dr Ejikeme, it's also important to keep your products away from heat and direct sunlight (so no shelfies on the window sill - you've been warned).

Ignoring shelf lives

'You may be surprised [to learn that] some formulations last as little as 6 weeks'. I'm told by Dr Ejikeme. 'When you are purchasing a vitamin C flip over the bottle. Underneath you will find how long the bottle will last before it is no longer active.'

Irregular use

As with many things in skincare, consistency is key when it comes to vitamin C, according to Dr. Barbara Sturm.

'Regular usage results in a complexion that’s healthy-looking, fresh and radiant.' That's because vitamin C's ability to defend the skin from aggressors is limited (it has a half-life of 8 hours according to some studies), so applying it at least daily is necessary to maintain the antioxidant benefits.

Vitamin C heroes to try today
THE GOOD C VITAMIN C SERUM
THE GOOD C VITAMIN C SERUM
Now 60% Off
€50 at drsturm.com
Credit: Dr. Barbara Sturm
Vita-C Glycolic Brightening Serum
Murad Vita-C Glycolic Brightening Serum
Credit: Murad
SkinCeuticals C E Ferulic - 30ml
SkinCeuticals C E Ferulic - 30ml
Credit: SkinCeuticals
La Roche-Posay Pure Vitamin C10 Serum 30ml
La Roche-Posay Pure Vitamin C10 Serum 30ml
Credit: La Roche-Posay
Lumene Nordic C [Valo] Glow Boost Essence 30ml
Lumene Nordic C [Valo] Glow Boost Essence 30ml
Credit: Lumene
Medik8 C-Tetra Intense Serum 30ml
Medik8 C-Tetra Intense Serum 30ml
Credit: MediK8
Dr Dennis Gross Skincare C+Collagen Brighten
Dr Dennis Gross Skincare C+Collagen Brighten
Credit: Dr Dennis Gross
Perricone MD Vitamin C Ester Brightening Serum
Perricone MD Vitamin C Ester Brightening Serum
Now 30% Off
Credit: Perricone MD

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From: Cosmopolitan UK