- 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.
Comments
I would not want to smell hot dogs all day and I feel like that would be the situation with the ferulic acid. And, every man should listen to his wife. Black bottles it is!
No to stinky hotdog smell 😜
i’m not a fan of hotdogs in general so would hate the smell on my body:P
Stick with just the VIT C.
Dont use it this product yet, would like to and plan on buying it. But if you have to use non natural fragrance then please dont use the hot dog water.
Leave it, but put a “warning” on the label
I feel like the C E Ferulic is a favorite with a lot of Skinceuticals fans. You might bring some of them over with that combo. I would definitely try it! Can you do that combo AND keep it in the dark bottle?
No ferulic acid, please. Have you done any tests to see how long the product lasts if stored in the opaque glass and in the fridge?
Leave out the stinky stuff – of any kind!! Please!
I’d opt for no hot dog water smell, please!