20% Vitamin C + E Ferulic Acid Serum — Reddit Reviews
by Timeless
Updated September 29, 2026
20% L-ascorbic acid, ferulic acid, and vitamin E for brighter skin; stingy.
What the community says
A 20% L-ascorbic acid serum with vitamin E and ferulic acid, built for AM use before sunscreen. It suits people chasing brightness, sun spots, and collagen support. The trade-off is real irritation, burning, and oxidation drama.
What this means for you
Backed by 30 threads from r/SkincareAddiction, r/30PlusSkinCare and 4 more.
Read the threads ↓What people love
- Vitamin C dupe without the luxury price
- Brightens dullness and fades dark spots
- Airless pump helps slow oxidation
Watch out for
- 20% strength hits hard — burning, stinging, and peeling come up a lot
- Not friendly to reactive skin or a wrecked barrier
- Smell is infamous — hot-dog water, dog food, vinegar
Product details
Use caution
Skin Type
Values
Product Traits
Key Ingredients
Where to buy
What the science says vs. what Reddit says
Hyperpigmentation
Some evidence
Vitamin C: 7 studies tested it on its own. See all 24 studies
On Reddit: Vitamin C at 20% concentration helps fade sun spots and brighten skin tone over consistent morning use. 33 mentions
What the studies found
- Most studies found vitamin C helped fade dark spots or patches
- Most studies in melasma found it made patches look lighter over time
- It worked about as well as glycolic acid in one study
- One study found only weak fading, and one dark-spot measure did not beat a placebo
Studied at 0.2–30%this product: 20%
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 321 mentions across 30 threads
Timeless 20% Vitamin C + E Ferulic Acid Serum on Reddit, in one place — 30 threads from r/SkincareAddiction, r/30PlusSkinCare and 4 more, summarized.
“Timeless vitamin C serum has been working well for the past 6 weeks or so.”
Positive
“I have acne prone skin and TO vit C in silicone broke me out and gave me clogged pores.”
Positive
“That could be just me. Timeless vitamin C serum has been working well for the past 6 weeks or so.”
Positive
“i’ve always had issues with the pump on the Timeless Vitamin C”
Positive
“My sensitive skin reacted badly to the Timeless Vitamin C. It was way too harsh for my skin barrier.”
Positive
“I use Timeless in the morning and tretinoin at night and my dark patches have faded like 70% in a year.”
Positive
“so I’m going to suggest Timeless Vitamin C.”
Positive
“This is why of all the dupes I've explored, I prefer the Timeless Vitamin C.”
Positive
“Timeless switched to an airtight pump bottle and I HATE it. The product leaks every single time.”
Positive
“This is stupid expensive though so I’m going to suggest Timeless Vitamin C.”
Positive
“I like that it comes in an airless pump that prevents oxidation over time.”
Positive
“That’s why I really like the timeless.”
Positive
“I’ve consistently used timeless vitamin c but stopped once I began tret to adjust.”
Mentioned
“Not sure when to implement it back..”
Mentioned
“Did you introduce vitamin c right away?”
Mentioned
“Would you mind sharing what vitamin C and copper peptide cream you're using?”
Positive
“I use Timless vitamin c and TOSOWOONG Copper Peptide cream!”
Positive
“Great results! Where do you buy the serum from?”
Positive
