It will be stable because of the special packaging, at least that's what they say.
Do you know the new Vitamin C24 Cream from Indeed Labs with 22% Vitamin C?
https://www.indeedlabs.com/products/vitamin-c24
yeah, that is what they say,
but hard to know what that really means in practice
mine was a light yellow colour when i got it
and it is a tone darker now,still half full
i don't know if it is now considered 'oxidised',
will need to look into that more
but certainly would not want to buy 4 times at much to see it darken up
i did see Ruth mention this cream in the Bathroom video with Sali Hughes
and will read the review, thank you,
i do though prefer a serum type thing,
it gets a bit too complicated too many mosturisers
when spf is also involved and bb cream
as you probably know
Indeed was Brendan Truaxe's previous company
now he is doing his inventing at Hylamide and Niod and others
as the Deciem founder
so i guess the 'newer stuff' and formulas can be found under those brands
to layer them all on top of each other, never mind the blur primer