Vitamin C Boosting Serum — Reddit Reviews
by Dr. Althea
Updated August 25, 2026
High-strength vitamin C serum fades scars and brightens; irritates sensitive skin.
What the community says
A 63% vitamin C serum that packs a brightening punch with scar-fading potential. Best for those with resilient skin who can handle potent actives. Not ideal if you have sensitive skin or are layering tretinoin, as irritation is common.
What this means for you
What people love
- High 63% vitamin C concentration boosts brightening and scar fading
- Gentle enough for some combination and sensitive skin users
- Can integrate well into morning routines with sunscreen
Watch out for
- May cause redness and irritation, especially with tretinoin use
- Purging-like bumps reported within first weeks of use
- Contains niacinamide, which can irritate some sensitive users
Product details
Where to buy
Real Reddit threads — 30 mentions across 13 threads
Dr. Althea Vitamin C Boosting Serum on Reddit, in one place — 13 threads from r/AsianBeauty, r/koreanskincare and 1 more, summarized.
“Dr. Althea Vitamin C Boosting Serum”
Mentioned
“Serums/Creams:”
Mentioned
“Here is the list of items. I've arranged them into categories.”
Mentioned
“went through 2 bottles of Dr. Althea vit c, no changes”
Cautionary
“I've tried many popular vitamin C including Melano CC and COSRX, they were all too oily for my complexion and irritated my skin”
Cautionary
“for gentler Vit C derivatives I always felt like they didn't do anything”
Cautionary
“But I’ve been using the Dr. Althea Vitamin C Boosting Serum (the brown bottle), and it’s been working really well for me.”
Positive
“I haven’t experienced any irritation or purging, and my skin has actually been improving.”
Positive
“I’m not sure about this variant, though I haven’t tried it myself.”
Positive
“Dr. Althea Vitamin C serum (day)”
Positive
“Also for my routine this is what i do: Annua 77+ Hyaluron toner, Dr. Althea Vitamin C serum (day), Annua 10+ Niacinimide (Night)”
Positive
“This is a pic of my skin by the window light.”
Positive
“I started using the Dr. Altheas 63% vitamin c serum.”
Cautionary
“I’ve noticed that after maybe a week of use, I’m having a lot of these bumps on my skin.”
Cautionary
“I normally have texture but the red/pink bumps are abnormal.”
Cautionary
“I was hoping the vitamin C would help me with my texture.”
Cautionary
“Also, I went straight to the 63% because I thought that my skin wasnt that sensitive, is this purging??”
Cautionary
“dr althea **Vitamin C Boosting Serum**”
Positive
“your Vitamin C Serum are already doing what you want it to do.”
Positive
“the Numbuzin no 5 line is known for their brightening effects and your Vitamin C Serum are already doing what you want it to do.”
Positive
