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niacinamide vs glutathione Glutathione vs Niacinamide: The Science Behind Skin Brightening – Newko Beauty

Marsoni M251S
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4.1 ★★★★★
Based on 773 reviews
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Verified Purchase
Deneane Simmers
Chelsea, US
★★★★★ 5
It works for my Very sensitive skin
This is the most gentle liquid exfoliant I've ever used. I have very sensitive skin and 3xs a week doesn't bother my skin at all! I Highly recommend it. DS
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026
T
Verified Purchase
tokyo2point0
Birmingham, US
★★★★★ 5
Bye bye ingrowns and dark spots
I love this exfoliant, I've bought it 3 times already. I use it on all my hyperpigmentation on my back, underarms, and face. It really helps with my ingrown hairs and reduces the appearance of dark spots. Super effective, I love it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
F
Verified Purchase
FW
Louisville, US
★★★★★ 4
Great product!
I use this once a week. I apply with my fingertips. (It is liquid, so a little goes a long way) After you wash your face for the night- wait a few minutes then apply this. If you don’t wait it might sting for a few minutes- so wait.. Apply your moisturizer after. My face was so soft the next day after one use. It is now a regular in my skin care routine. I do not use another active like retinol or tea tree serum the day after.. just moisturizer. Would recommend and will buy again.
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Reviewed in the United States on March 23, 2026
C
Verified Purchase
Crystal
Lexington, US
★★★★★ 5
Good product
This seems to be working really well. I used to use a different brand of BHA and I like this one better. I do wish they had an eye dropper version, but it’s fine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
J
Verified Purchase
James
Houston, US
★★★★★ 5
Works Perfectly
This has improved my complexion greatly. Wrinkles and fine lines are smaller. My pores have shrunken as well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026

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