Last summer, after checking out prices on Amazon, I went for a 20% C E Ferulic serum that worked well for me.
The price was $25 , which wasn't heart attack territory but still, so I thought I'd check out a few do-it-yourself formulas.
I get that vitamin C serum needs to be protected (store in fridge, protect from light, use a vacuum bottle) but there seems to be an on going to campaign against DIY serum.
It's not like my DIY serum needs to be made in a batch for more than a few weeks, I'm thinking I'll freeze any excess, but have I gone off the rails here?
This looks like it should work but will it?