The Ordinary PAO, NIOD & Hylamide

The Ordinary PAO

The Ordinary PAO, Period After Opening, Expiry Date & Shelf Life

What is The Ordinary PAO?

The Ordinary PAO

PAO stands for “period after opening”. You will find the above symbol with 3m, 6m, 9m, 12m etc., somewhere on the product and box. This means that once you have opened your product, it should be used within 3 months, 6 months or 12 months. It’s worth writing the date you opened it on the box or bottle.

The Ordinary PAO (period after opening), expiry date & shelf life will vary from product to product.

The Ordinary PAO Period After Opening

The Ordinary & Deciem Products Expiry Dates

Some of The Ordinary and other Deciem products have expiry dates.

  • The Ordinary Sun Cream
  • Niacinamide Powder
  • L-Ascorbic Acid Powder
  • NIOD CAIL Copper Amino Isolate Lipid
  • There may be some others

The Ordinary, NIOD, Hylamide, The Chemistry Brand PAO

Below are some of the products I currently own, and I have added the PAO for you to see. Please be aware that Deciem updates their formulas regularly, so your PAO may differ depending on when you purchased it.

The Ordinary Peptides PAO Period After Opening

Argireline 12M

The Ordinary Acids PAO Period After Opening

Glycolic Acid 12MAHA 30% 12M
Lactic Acid 10%12MLactic Acid 5%12M
Mandelic Acid12MAzelaic Acid12M
Salicylic Acid Masque6M

The Oils & Hydrators PAO Period After Opening

Squalane Oil 6MNatural Moisturising Factors12M
Hemi Squalane6MHyaluronic Acid
Borage Seed Oil6MMarine Hyaluronics12M
Chia Seed Oil 6MAmino Acids12M
B Oil6M

The Ordinary More Molecules PAO

Niacinamide 10%12MNiacinamide PowderExpiry date (side of box)
Alpha Arbutin12M

The Ordinary Antioxidants PAO

EUK 1346MPycnogenol6M
Resveratrol & Ferulic Acid6M

The Ordinary Vitamin C PAO Period After Opening

Vitamin C 23% 12MVitamin C 30%12M
Ascorbyl Glucoside 12M

The Ordinary Cleanser, Concealer, Foundations, Hair Serum & Primers PAO

Multi-Peptide Hair Serum12MSerum Foundation12M
Squalane Cleanser6MCoverage Foundation12M
High-Adherence Silicone Primer12M

Hylamide PAO

Hylamide C25 6MSub Q Eyes12M
Sub Q Skin12MHydra-Density mist12M
High-Efficiency Face Cleaner12MHA Blur 12M

NIOD PAO Period After Opening


The Chemistry Brand PAO Period After Opening

Hand Chemistry12MHeel Chemistry12M

What is the shelf life of The Ordinary, NIOD, Hylamide

Deciem said that the shelf of…

  • The Ordinary products are 3 years
  • Hyalamide around 2 years
  • NIOD is between 18 and 24 months

From experience, if you purchase copper peptides, I would advise you to use them as soon as possible as we have found they turn black rather than stay the gorgeous blue if you store them for too long.

If you do not buy a complete routine…

  • You will spend more than you actually need to.
  • There will be products that conflict and, therefore, cannot use them together.
  • Too many products can damage your skin.
  • If you do not stick to a regimen, you will not know if it´s working
  • The period after opening on some products is just 3 months.

How long does a bottle of The Ordinary last?

If you use a 30ml bottle at least once every day, then you´re probably looking around 3/4 months. But if you have many products on the go and only use them once or twice a week, you will probably find that you go over the PAO. When it comes to buying masks, particularly the NIOD masques, I recommend purchasing smaller-sized products where possible if you are only going to use them once or twice a week.

Some Tips

  • Write on the bottle or box the date you opened the product.
  • Don’t have too many products on the go at once.
  • Retinol & Retinoids now need to be kept in the fridge and have a PAO of 3 months.
  • Wipe the neck of the bottles. Some products can get quite gloopy, particularly some of the oils and the caffeine.
  • The smaller jars of NIOD may work out more expensive, but I think are better to purchase as you are more likely to use it all up in time.
  • Don´t stock up on Copper Peptide products just because they’re cheap! We have found they don´t stay the gorgeous blue if stored too long.