20% Vitamin C + E Ferulic Acid Serum — Reddit Reviews
by Timeless
Updated October 14, 2026
20% L-ascorbic acid fades dark spots and boosts glow; irritates reactive skin.
What the community says
A high-strength L-ascorbic acid serum with ferulic acid, vitamin E, panthenol, and sodium hyaluronate, built for stubborn discoloration and dullness. It layers cleanly under sunscreen, but reactive, tret-irritated, or breakout-prone skin can face burning, redness, or clogged pores.
What this means for you
Backed by 30 threads from r/SkincareAddiction, r/30PlusSkinCare and 4 more.
Read the threads ↓What people love
- 20% L-ascorbic acid for visible brightening
- Near-dupe formula at roughly $20–30
- Watery, non-sticky texture under sunscreen
Watch out for
Product details
Use caution
Values
Product Traits
Key Ingredients
Where to buy
What the science says vs. what Reddit says
Hyperpigmentation
Some evidence
Vitamin C: 9 studies tested it on its own. See all 20 studies
On Reddit: Three-month sunspot clearance stands out, with one user reporting the spots disappeared completely. 32 mentions
What the studies found
- Most studies found it helped fade dark patches or make skin tone look more even
- With microneedling, vitamin C improved melasma in several studies
- It worked about as well as tranexamic acid in some microneedling studies
- Side effects were usually mild, short-lived, or not reported
Studied at 3–30%this product: 20%
Anti-Aging
Some evidence
Vitamin C: 6 studies tested it on its own. See all 17 studies
On Reddit: Neck use gets a specific shoutout: one person says it did wonders for their tech neck. 16 mentions
What the studies found
- All 6 studies that tested vitamin C on its own found it helped with signs of aging
- Studies found it improved wrinkles, including crow’s-feet and lines around the eyes
- It also made sun-damaged skin look smoother and improved overall skin appearance
- It did not seem to improve how much water the skin held more than a placebo
- No side effects were reported in one clinical trial
Studied at 1–30%this product: 20%
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 340 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
