- a reduction in dark spots and fine lines,
- increased brightness, overall smoothness,
- and even marked improvements for skin conditions like psoriasis.
If you've been with us a while, you'll know I (Steve) am a little skeptical with skincare claims, but Vitamin C serums with 10 - 20% L-Ascorbic acid seem to be a pretty safe bet in gaining the above mentioned benefits and in some cases this:
But here's the thing. In my own use, I've noticed that I have be really careful to ensure it doesn't go bad (like storing it in the fridge before use).
You'll know that it goes bad when it turns dark brown.
To offset the volatility, we've added Vitamin E (Tocopherol is the chemical name) & store it in black - opaque - bottles, but we're also considering the addition of ferulic acid, which is supposed to be the gold standard in preservation.
But Ferulic acid SMELLS BAD. Like hotdog water. And we don't think it's a good idea to add fragrances to 'mask' the odor.
So here's my question to you:
Has your etee serum gone bad and if so, how quickly? NOTE: it's fine if it turns yellow to orange, but once it gets dark orange or brown, that means it's not effective.
Would you be willing to accept a hotdog water smell if it meant the serum lasted longer and absorbed better?
Let me know in the comments below...
And CLICK HERE if you'd like to learn more about our 15% V-C Serum.
I would not use it if it smells bad, so dark glass is my choice.