Dr. Idriss

Left Un-Red Reducer Face Serum for Redness and Blemish Prone Skin

4.4 · 126 reviews
7,222 ₽

What it is: A redness-reducing azelaic acid treatment serum that targets flushing and breakouts, with the National Rosacea Society Seal of Acceptance.Skin Type: Normal, Dry, Combination, and Oily Skincare Concerns: Pores, Redness, Acne and BlemishesFormulation: SerumHighlighted Ingredients:- 10% Azelaic Acid Complex: Reduces the look of breakouts and redness.- 18-ß-Glycyrrhetinic Acid: Decreases redness and soothes skin irritation.- Capryloyl Glycine: Regulates oil production.Ingredient Callouts: Free of parabens, formaldehydes, formaldehyde-releasing agents, phthalates, mineral oil, retinyl palmitate, oxybenzone, coal tar, hydroquinone, sulfates SLS & SLES, triclocarban, triclosan, and contains less than one percent synthetic fragrance. It is also cruelty-free.What Else You Need to Know: Minimize redness and irritation, preventing future flare-ups and balance oil production. The Reducer Serum is sensitive-skin friendly and fragrance-free, containing two cartridges to ensure the highest level of formula freshness. This product is clinically backed and was developed by board-certified dermatologist Dr. Idriss (@shereeneidriss) with her favorite hydrating ingredient, glycerin.Clinical Results: Based on an independent, third-party clinical study and consumer-perception study of 34 subjects who used the Left Un-Red Reducer Serum and CalmBack Cream for 8 weeks:- 97% of users reported reduced appearance of chronic or frequent redness - 100% of users reported reduced severity of flareups - 97% of users reported soothing of chronically sensitive, inflamed skin

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What it is: A redness-reducing azelaic acid treatment serum that targets flushing and breakouts, with the National Rosacea Society Seal of Acceptance.Skin Type: Normal, Dry, Combination, and Oily Skincare Concerns: Pores, Redness, Acne and BlemishesFormulation: SerumHighlighted Ingredients:- 10% Azelaic Acid Complex: Reduces the look of breakouts and redness.- 18-ß-Glycyrrhetinic Acid: Decreases redness and soothes skin irritation.- Capryloyl Glycine: Regulates oil production.Ingredient Callouts: Free of parabens, formaldehydes, formaldehyde-releasing agents, phthalates, mineral oil, retinyl palmitate, oxybenzone, coal tar, hydroquinone, sulfates SLS & SLES, triclocarban, triclosan, and contains less than one percent synthetic fragrance. It is also cruelty-free.What Else You Need to Know: Minimize redness and irritation, preventing future flare-ups and balance oil production. The Reducer Serum is sensitive-skin friendly and fragrance-free, containing two cartridges to ensure the highest level of formula freshness. This product is clinically backed and was developed by board-certified dermatologist Dr. Idriss (@shereeneidriss) with her favorite hydrating ingredient, glycerin.Clinical Results: Based on an independent, third-party clinical study and consumer-perception study of 34 subjects who used the Left Un-Red Reducer Serum and CalmBack Cream for 8 weeks:- 97% of users reported reduced appearance of chronic or frequent redness - 100% of users reported reduced severity of flareups - 97% of users reported soothing of chronically sensitive, inflamed skin

Customer reviews

5.0
verified purchase
Calming and lightweight

I really like how lightweight and soothing this serum feels on my skin. It absorbs quickly without feeling sticky or heavy, and it layers nicely with the rest of my skincare. My skin feels calmer and more comfortable after using it, and I like that it gives hydration without making me feel greasy.

9/30/2026
5.0
verified purchase
Must haveee

Such a good product! Makes a big difference ❤️ for real

9/29/2026
1.0
verified purchase
Peels Off Instead of Absorbing

I was very disappointed with this serum. It didn’t absorb into my skin at all. Instead, it dried into a film and started peeling off in tiny pieces. Every time I applied sunscreen or another product on top, the serum rolled up and came off. I’ve never experienced this with any other serum.

7/11/2026
5.0
verified purchase

Full disclosure, I’m using this concurrently with a series of IPL laser treatments and daily red light therapy. I think it is making a difference in redness and texture with my other interventions. I don’t think it will take care of everything on its own but I’m a fan of

6/7/2026
3.0
verified purchase
Good but not THAT good

I can see this helping my redness and helping my skin but I can only use it as light as it peels SO bad under makeup, even if I have a bare face and happen to rub my hand on my face it comes off in clumps! I’ve been using 2-3 pumps of this and one pump of mosturizer. Again it’s a good product but impossible to use under makeup

4/21/2026
3.0
verified purchase
Not worth the price

Ok, I didn’t notice an improvement but it didn’t make my rosacea worse. Not sure it’s worth the price.

4/5/2026
5.0
verified purchase
A must have for Sensitive and redness in skin

After using this serum the past few weeks it has become a staple in my skincare routine along with Dr Idriss SPF in the morning and in the evening with the moisturizer.

3/31/2026
1.0
verified purchase
This did not work for me!

I just want to start by saying I’ve used Dr. Idriss products before and have loved them -- except for this one. My skin reacted really badly to it. The redness got worse and I had a burning, tight sensation all over my face. I stopped using it and after a few days my skin went back to normal.

3/16/2026
5.0
verified purchase

I’ve been using this serum for a few weeks and really like it. It’s lightweight, absorbs quickly, and layers well with the rest of my skincare. It helped calm my redness and made my skin look more balanced without feeling drying or irritating. Also seems to help with small breakouts. Overall, a great option if you struggle with redness or sensitive, acne-prone skin.

3/10/2026
5.0
verified purchase
My favorite new skin care must have

As someone with mild rosecea who is prone to facial flushing this has been a welcome game changer in my skin routine. One pump of syringe split on my cheek is where I tend to flush constantly seeminly has taken away my constant red checks. A skin game changer for me. Within a week I was able to see quite a significant change.

3/10/2026