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Details & care
What it is: A dermatologist-tested serum treatment that targets dark spots on your face.
Who it's for: All skin types.
What it does: Formulated with 4% niacinamide and 1% ethyl vitamin C, this hyperpigmentation serum helps visibly reduce dark spots and discoloration while helping to improve skin's clarity.
How to use: Apply 4–5 drops to clean skin after cleansing morning and night using your fingertips.
- 1 oz.
- Vegan
- Made in the USA
- Item #6735002
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Most helpful positive review
Feb 3, 2026
One of the only products that does what it says
[This review was collected as part of a promotion.] I tend to get dark spots and discoloration. I use Bye By Dark Spots for the last couple years and it works. I have tried numerous other brands and nothing comes close to this product. When you apply it does not leave a discolored residue, does not dry out my skin, and definitely works very well. If I skip using, dark spots are definitely more noticeable and hard to cover with makeup. I highly recommend.
Cucumberstopickles
Reposted from itcosmetics.com
Most helpful critical review
Nov 25, 2025
Not for sensitive skin
My skin could not tolerate this serum. Experienced significant burning and redness lasting two days. I have eczema-prone skin and need a more gentle product.
HotChicken
Verified purchase
Reposted from itcosmetics.com
itcosmetics.com response
Hello HotChicken! Thank you for sharing your experience with the Bye Bye Dark Spots Niacinamide Serum. We are very sorry to hear that you experienced significant burning and redness. And that you need a more gentle product for your eczema prone skin. We apologize that you encountered these issues and want to help. We would like to speak with you about this and respectfully request you call our Customer Service at 1-800-356-5120 anytime Monday-Saturday 9:00 A.M.-5:00 P.M. EST. Please provide the agent answering your call with this case number 43855278. We look forward to speaking with you!
5 stars
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Sort by Most Helpful
Allison337
Reposted from itcosmetics.com
Feb 8, 2026
So far so good…
[This review was collected as part of a promotion.] I’ve been using this product a few times a week for 2 months. So far I like it and I think I’m seeing results.
Cucumberstopickles
Reposted from itcosmetics.com
Feb 3, 2026
One of the only products that does what it says
[This review was collected as part of a promotion.] I tend to get dark spots and discoloration. I use Bye By Dark Spots for the last couple years and it works. I have tried numerous other brands and nothing comes close to this product. When you apply it does not leave a discolored residue, does not dry out my skin, and definitely works very well. If I skip using, dark spots are definitely more noticeable and hard to cover with makeup. I highly recommend.
Jill57
Reposted from itcosmetics.com
Jan 27, 2026
Lightening
We have been using this Niacinamide on some dark spots on my husband's forehead and are excited to see lightening occurring.
AndyC
Reposted from itcosmetics.com
Jan 14, 2026
Excellent
I was amazed !!! It lightened my dark spots on my face that I’ve had for over thirty years no other product has done this and I have tried many. I highly recommend this product.
Robbin732
Reposted from itcosmetics.com
Dec 11, 2025
Bye Bye Dark Spots
[This review was collected as part of a promotion.] My dark spots have definitely faded since using this product.
Ren21
Reposted from itcosmetics.com
Dec 1, 2025
Love it
Really makes my dark spots disappear! I buy 5at a time! Have to have it