Gentle Vitamin C Serum — Reddit Reviews
by Dr. Althea
Updated September 25, 2026
Lightweight vitamin C serum for brightening and fading spots; very YMMV.
What the community says
A lightweight vitamin C serum with niacinamide that people use in the morning for glow, dark spots, and general brightening. Redditors like the gentle feel and non-irritating application, but plenty say the results are subtle or nonexistent, so expectations should stay low.
What this means for you
What people love
- Light feel, non-irritating
- Niacinamide plus vitamin C for brightening
- Good starter C serum
Watch out for
- Brightening can be underwhelming
- Some users got breakouts
- Fishy smell complaints pop up
Product details
Where to buy
What the science says vs. what Reddit says
Acne
Some evidence
Niacinamide: 6 studies tested it on its own. See all 17 studies
What the studies found
- Most studies found niacinamide helped acne
- Some studies found 4% niacinamide cleared acne about as well as clindamycin
- One study found 4% niacinamide improved red, sore spots, but IPL worked better
- Some research found no clear difference, and a large review said the effects were uncertain
Hyperpigmentation
Some evidence
Niacinamide: 5 studies tested it on its own. See all 24 studies
On Reddit: Gentle 3-O-Ethyl Ascorbic Acid serum hides mild sun freckling and old acne marks on oily-combination skin. 5 mentions
What the studies found
- All of these studies found niacinamide helped fade dark spots or patches
- In clinical trials, 5% niacinamide faded dark spots more than a placebo
- It also helped when used with salicylic acid peels, more than peels alone
- Used on its own, it helped, but one study found a niacinamide mix worked better
- One study found the fading effect reversed after stopping niacinamide
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 32 mentions across 11 threads
Dr. Althea Gentle Vitamin C Serum on Reddit, in one place — 11 threads from r/koreanskincare, r/AsianBeauty and 2 more, summarized.
“Dr Althea Gentle Vitamin C Serum!!!”
Positive
“I saw a major difference after just one use of this serum!!”
Positive
“in the morning I could see my actual skin colour on my cheeks for the first time since I was a child”
Positive
“Dr. Althea Gentle Vitamin C Serum - Very gentle.”
Positive
“I feel like it helped a bit with the acne scars on my chest.”
Positive
“I would like to try a stronger vit c serum next.”
Positive
“dr Althea vitamin c is one of my fav since it’s light and doesn’t irritate my skin.”
Positive
“I use the Dr. Althea vitamin C serum and it’s pretty good.”
Positive
“I've used Dr Althea vitamin C serum and it's pretty good too”
Positive
“Dr. Althea gentle vitamin c serum (for pigmentation)”
Mentioned
“Need Suggestions or opinions on the products listed below.”
Mentioned
“***Serum***:”
Mentioned
“Dr. Althea Gentle Brightening Vitamin C Serum”
Positive
“UPDATED WEEKLY ROUTINE”
Positive
“Morning ☀️ (Mon-Sat)”
Positive
“Apply Dr. Althea Gentle Vitamin C Serum (something about the skin's natural pH?? so it needs to go on before the Hada Labo)”
Positive
“Vitamin c before the peptide booster.”
Positive
“Yes actives earlier in the routine is recommended for more direct penetration and pure vitamin c is ph dependent”
Positive
Dupes & Alternatives
Anua
Azelaic Acid Hyaluron Redness Soothing Serum
Better for Hyperpigmentation
9 shared traits
676 mentions
