Senté Cysteamine HSA Pigment & Tone Correcting Mask
Treatment mask that combines Cysteamine and HSA to visibly reduce hyperpigmentation and brighten the complexion.
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Sente Cysteamine HSA Pigment & Tone Correcting Mask is a targeted pigmentation treatment designed for hyperpigmentation, melasma, post-inflammatory discoloration, and uneven skin tone. Powered by cysteamine, a clinically studied melanin inhibitor shown to outperform hydroquinone in peer-reviewed research, alongside Sente's proprietary Heparan Sulfate Analog (HSA), it delivers meaningful tone correction while supporting the skin barrier rather than disrupting it. Applied to completely dry, uncleansed skin for 15 minutes in the morning and then rinsed, it works as a seamless add-on to any existing brightening routine without requiring you to change a single step. One thing to know going in: cysteamine has a distinctive, sulfur-like scent. Consider it the smell of science doing its job.
Key Benefits
Cysteamine Melanin Correction: Cysteamine inhibits tyrosinase activity and neutralizes free radicals that trigger excess melanin production, addressing hyperpigmentation at a cellular level.
Clinically Proven Performance: Clinical studies show cysteamine outperforms 4% hydroquinone for correcting hyperpigmentation and melasma without the risks associated with long-term hydroquinone use.
HSA Barrier Support: Sente's patented Heparan Sulfate Analog works alongside cysteamine to support skin health and cellular renewal, making tone correction gentler and more sustainable.
Fades Dark Spots and Discoloration: Targets post-inflammatory hyperpigmentation from acne, sun damage, and hormonal shifts to visibly even the overall skin tone with regular use.
Hydroquinone-Free Formula: Delivers professional-level pigmentation correction without hydroquinone, making it a safer long-term option for clients who have cycled off prescription brighteners.
Versatile Body Application: Effective on discoloration anywhere on the body, including elbows, knees, and underarms, making it a comprehensive solution for uneven tone wherever it appears.
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In a 16 week clinical study conducted by Sente:
- 71% overall reduction in dark spots
- 94% of subjects showed an improvement in hyperpigmentation
- 94% of subjects agreed that dark patches looked less noticeable
*Data on file with Sente
-
Sente Cysteamine HSA Pigment & Tone Correcting Mask is the right choice for anyone dealing with stubborn hyperpigmentation, melasma, sunspots, or post-acne dark marks who wants a clinically supported alternative to hydroquinone. Because cysteamine is non-toxic and does not carry the long-term risks associated with prescription brighteners, it is especially valuable for clients who have been on and off hydroquinone or who are looking for a sustainable, long-term approach to tone correction.
This mask also works well for those with sensitive or reactive skin who have struggled to tolerate traditional brightening ingredients like kojic acid, azelaic acid at high concentrations, or prescription retinoid-brightening combinations. The HSA in the formula supports the barrier while the cysteamine addresses discoloration, making the overall experience gentler than most corrective treatments at this level of efficacy.
Beyond the face, this mask is equally effective on body areas prone to discoloration — elbows, knees, underarms, and similar zones respond well to consistent application. For use around the bikini line, mix it half and half with a gentle, fragrance-free lotion before applying to reduce the concentration and minimize sensitivity in that area.
If you are already on a brightening skincare routine, this mask slots in as the perfect addition without requiring you to overhaul anything. It is the treatment layer, not a replacement for your existing regimen.
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The single most important thing you can do to get results from this mask is use it consistently. No less than five days per week, ideally daily, for 12 to 18 weeks until you reach your desired results — then drop to twice per week as maintenance. Inconsistent use is the most common reason clients do not see the results they expect.
The easiest way to build that consistency is to make it your very first step of the day. Roll out of bed, apply the mask to your completely dry, uncleansed face, and let it sit while you make coffee or go about your morning. After 15 minutes, rinse it off and continue with your normal routine. No extra time, no disruption to what you are already doing.
-
Prepare: Apply to completely dry, uncleansed skin first thing in the morning before washing your face. Do not apply to freshly cleansed or damp skin.
Apply: Smooth a generous, even layer over the face, focusing on areas of discoloration. Avoid the eye area. For body areas including elbows, knees, and underarms, apply the same way. For the bikini line area, mix half and half with a gentle fragrance-free lotion before applying.
Technique: Leave on for exactly 15 minutes. Do not leave on longer than 15 minutes to avoid any irritation. Rinse thoroughly with lukewarm water, then cleanse and continue with your normal morning routine including SPF.
Frequency: Use no less than five days per week, ideally daily, for 12 to 18 weeks until desired results are achieved. Once results are reached, reduce to twice per week as a maintenance dose. Daily broad-spectrum SPF 30 or higher is essential throughout treatment to protect corrected skin from UV-triggered repigmentation.
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Key Ingredients
- Cysteamine HCl: A powerful antioxidant naturally found in the skin's own cells, Cysteamine HCl works by intercepting the skin's melanin production process to visibly fade dark spots, even skin tone, and prevent future discoloration from forming.
- Heparan Sulfate Analog (HSA): Senté's breakthrough patented molecule is clinically proven to go beyond surface hydration to deeply replenish moisture, reduce visible redness, and support the skin's natural ability to repair itself at a cellular level, delivering profound and lasting rejuvenation.
- Vitamin C (Tetrahexyldecyl Ascorbate): A deeply penetrating, oil-soluble form of Vitamin C that brightens dark spots, evens skin tone, and boosts collagen production without the irritation or instability of traditional Vitamin C.
- Niacinamide: A multitasking form of vitamin B3 that helps balance oil, strengthen the skin barrier, and improve uneven tone and texture while calming redness for healthier looking skin.
- Vitamin E (Tocopherol): Soothes, brightens, and helps reverse and protect against environmental damage.
- Ergothioneine: An antioxidant amino-acid that helps prevent antioxidant degredation in other ingredients, while reducing the effects of aging and photodamage.
Water/Aqua/Eau, Dimethicone, Caprylic/Capric Triglyceride, Isononyl Isononanoate, Cysteamine HCl, Niacinamide, C12-16 Alcohols, Lecithin, Tetrahexyldecyl Ascorbate, Cetearyl Alcohol, Glycerin, Heparan Sulfate, Polysilicone-11, Tocopheryl Acetate, Hydrogenated Lecithin, Palmitic Acid, Hydroxyacetophenone, Diethylhexyl Syringylidenemalonate, Polyacrylate-13, Butylene Glycol, Epilobium Angustifolium Flower/Leaf/Stem Extract, Mannitol, Ergothioneine, Sclerotium Gum, Lysolecithin, Polyisobutene, Decyl Glucoside, Pullulan, Aminomethyl Propanol, Xanthan Gum, Sodium Stearoyl Glutamate, Fragrance, Polysorbate 20, Propanediol, Ethylhexylglycerin, Phenoxyethanol, Disodium EDTA
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We offer free shipping on every order $50+ (just $7 flat-rate below that). Orders placed before 1pm PST Monday through Friday ship out the same day. Orders placed outside of that window are shipped the very next business day!
Changed your mind? We get it. That's why our return window is generous: 30 days even if you've opened and tried it, or a full 60 days if it's still sealed. Some exclusions apply. See our full return policy for details. -
What is cysteamine and how does it treat hyperpigmentation?
Cysteamine is a naturally occurring aminothiol compound found in human cells that inhibits tyrosinase, the enzyme responsible for melanin overproduction. It also scavenges free radicals that trigger excess pigmentation. Clinical trials have shown cysteamine to be as effective as or more effective than 4% hydroquinone for correcting hyperpigmentation and melasma, without the risks of long-term hydroquinone use. It does have a distinctive, sulfur-like scent due to its chemical nature — this is normal, expected, and a sign the active is present and potent. The smell rinses away completely.
Is Sente Cysteamine Mask safe for melasma?
Yes. Sente Cysteamine HSA Pigment & Tone Correcting Mask is clinically supported for melasma treatment and is a strong option for clients who need effective tone correction without the long-term concerns associated with hydroquinone. Because melasma is a hormonally driven condition, consistent sun protection must be used alongside any corrective treatment for lasting results. Consistency of use — no less than five days per week — is especially important for melasma, which tends to require the full 12 to 18 week treatment window.
Why do I apply this mask to dry, unwashed skin?
Applying cysteamine to dry, uncleansed skin maximizes the active ingredient's contact with the surface and allows for more efficient delivery to melanin-producing cells. Cleansed or damp skin introduces water and disrupts the skin's natural surface environment, both of which can dilute the formula before it has time to work. The easiest and most effective approach is to apply it first thing in the morning before washing your face — put it on when you wake up, go about your morning for 15 minutes, then rinse and proceed with your normal routine.
How often should I use the Sente Cysteamine Mask, and how long until I see results?
Consistency is everything with this mask. Use it no less than five days per week, ideally daily, for 12 to 18 weeks until your desired results are reached. Most clients begin to see visible improvement in dark spots and overall tone around 8 to 10 weeks, with melasma and deeper pigmentation typically showing significant change by the 12 to 18 week mark. Once you reach your goal, you do not need to stop — simply reduce to twice per week as a maintenance dose to sustain your results. Inconsistent use is the most common reason clients do not achieve the outcomes they expect from this treatment.
Can I use the Sente Cysteamine Mask on my body?
Yes. This mask is effective on any area of the body where discoloration is present, including elbows, knees, and underarms. Apply to dry skin the same way you would on the face and rinse after 15 minutes. For use around the bikini line, mix the mask half and half with a gentle, fragrance-free lotion before applying to dilute the concentration and reduce the potential for sensitivity in that area.
Can I use the Sente Cysteamine Mask if I have sensitive skin?
Yes. Sente Cysteamine HSA Pigment & Tone Correcting Mask is formulated to be well tolerated by sensitive skin types. Cysteamine is a naturally occurring compound with a strong clinical safety profile, and the HSA in the formula supports the skin barrier, making this one of the gentler options available for serious pigmentation correction. If you are new to the formula, begin with five times per week and increase to daily as your skin adjusts.
How does this mask compare to hydroquinone treatments?
Peer-reviewed clinical studies have shown cysteamine to be comparable to or more effective than 4% hydroquinone for treating hyperpigmentation and melasma, without the risks associated with long-term hydroquinone use such as ochronosis, rebound hyperpigmentation, or hormonal disruption concerns. It is considered a safer long-term brightening strategy, particularly for clients who have been on extended hydroquinone regimens and are looking for a way to maintain their results without cycling back onto a prescription.
Why buy Sente Cysteamine HSA Pigment & Tone Correcting Mask from Art of Skin Care?
Art of Skin Care is an authorized retailer of Sente Labs, so every product you receive is 100% authentic, sourced directly through official brand channels and never from third-party resellers. Our team is made up of licensed, acne-certified estheticians who hand-select the products we carry based on real skin science and professional results. We don't just sell skincare; we understand it. Not sure if this product is right for your skin? Get a free skincare consultation and one of our estheticians will personally guide you.
Sente Cysteamine HSA Pigment & Tone Correcting Mask is a targeted pigmentation treatment designed for hyperpigmentation, melasma, post-inflammatory discoloration, and uneven skin tone. Powered by cysteamine, a clinically studied melanin inhibitor shown to outperform hydroquinone in peer-reviewed research, alongside Sente's proprietary Heparan Sulfate Analog (HSA), it delivers meaningful tone correction while supporting the skin barrier rather than disrupting it. Applied to completely dry, uncleansed skin for 15 minutes in the morning and then rinsed, it works as a seamless add-on to any existing brightening routine without requiring you to change a single step. One thing to know going in: cysteamine has a distinctive, sulfur-like scent. Consider it the smell of science doing its job.
Key Benefits
Cysteamine Melanin Correction: Cysteamine inhibits tyrosinase activity and neutralizes free radicals that trigger excess melanin production, addressing hyperpigmentation at a cellular level.
Clinically Proven Performance: Clinical studies show cysteamine outperforms 4% hydroquinone for correcting hyperpigmentation and melasma without the risks associated with long-term hydroquinone use.
HSA Barrier Support: Sente's patented Heparan Sulfate Analog works alongside cysteamine to support skin health and cellular renewal, making tone correction gentler and more sustainable.
Fades Dark Spots and Discoloration: Targets post-inflammatory hyperpigmentation from acne, sun damage, and hormonal shifts to visibly even the overall skin tone with regular use.
Hydroquinone-Free Formula: Delivers professional-level pigmentation correction without hydroquinone, making it a safer long-term option for clients who have cycled off prescription brighteners.
Versatile Body Application: Effective on discoloration anywhere on the body, including elbows, knees, and underarms, making it a comprehensive solution for uneven tone wherever it appears.
In a 16 week clinical study conducted by Sente:
- 71% overall reduction in dark spots
- 94% of subjects showed an improvement in hyperpigmentation
- 94% of subjects agreed that dark patches looked less noticeable
*Data on file with Sente
Sente Cysteamine HSA Pigment & Tone Correcting Mask is the right choice for anyone dealing with stubborn hyperpigmentation, melasma, sunspots, or post-acne dark marks who wants a clinically supported alternative to hydroquinone. Because cysteamine is non-toxic and does not carry the long-term risks associated with prescription brighteners, it is especially valuable for clients who have been on and off hydroquinone or who are looking for a sustainable, long-term approach to tone correction.
This mask also works well for those with sensitive or reactive skin who have struggled to tolerate traditional brightening ingredients like kojic acid, azelaic acid at high concentrations, or prescription retinoid-brightening combinations. The HSA in the formula supports the barrier while the cysteamine addresses discoloration, making the overall experience gentler than most corrective treatments at this level of efficacy.
Beyond the face, this mask is equally effective on body areas prone to discoloration — elbows, knees, underarms, and similar zones respond well to consistent application. For use around the bikini line, mix it half and half with a gentle, fragrance-free lotion before applying to reduce the concentration and minimize sensitivity in that area.
If you are already on a brightening skincare routine, this mask slots in as the perfect addition without requiring you to overhaul anything. It is the treatment layer, not a replacement for your existing regimen.
The single most important thing you can do to get results from this mask is use it consistently. No less than five days per week, ideally daily, for 12 to 18 weeks until you reach your desired results — then drop to twice per week as maintenance. Inconsistent use is the most common reason clients do not see the results they expect.
The easiest way to build that consistency is to make it your very first step of the day. Roll out of bed, apply the mask to your completely dry, uncleansed face, and let it sit while you make coffee or go about your morning. After 15 minutes, rinse it off and continue with your normal routine. No extra time, no disruption to what you are already doing.
Prepare: Apply to completely dry, uncleansed skin first thing in the morning before washing your face. Do not apply to freshly cleansed or damp skin.
Apply: Smooth a generous, even layer over the face, focusing on areas of discoloration. Avoid the eye area. For body areas including elbows, knees, and underarms, apply the same way. For the bikini line area, mix half and half with a gentle fragrance-free lotion before applying.
Technique: Leave on for exactly 15 minutes. Do not leave on longer than 15 minutes to avoid any irritation. Rinse thoroughly with lukewarm water, then cleanse and continue with your normal morning routine including SPF.
Frequency: Use no less than five days per week, ideally daily, for 12 to 18 weeks until desired results are achieved. Once results are reached, reduce to twice per week as a maintenance dose. Daily broad-spectrum SPF 30 or higher is essential throughout treatment to protect corrected skin from UV-triggered repigmentation.
- Cysteamine HCl: A powerful antioxidant naturally found in the skin's own cells, Cysteamine HCl works by intercepting the skin's melanin production process to visibly fade dark spots, even skin tone, and prevent future discoloration from forming.
- Heparan Sulfate Analog (HSA): Senté's breakthrough patented molecule is clinically proven to go beyond surface hydration to deeply replenish moisture, reduce visible redness, and support the skin's natural ability to repair itself at a cellular level, delivering profound and lasting rejuvenation.
- Vitamin C (Tetrahexyldecyl Ascorbate): A deeply penetrating, oil-soluble form of Vitamin C that brightens dark spots, evens skin tone, and boosts collagen production without the irritation or instability of traditional Vitamin C.
- Niacinamide: A multitasking form of vitamin B3 that helps balance oil, strengthen the skin barrier, and improve uneven tone and texture while calming redness for healthier looking skin.
- Vitamin E (Tocopherol): Soothes, brightens, and helps reverse and protect against environmental damage.
- Ergothioneine: An antioxidant amino-acid that helps prevent antioxidant degredation in other ingredients, while reducing the effects of aging and photodamage.
Water/Aqua/Eau, Dimethicone, Caprylic/Capric Triglyceride, Isononyl Isononanoate, Cysteamine HCl, Niacinamide, C12-16 Alcohols, Lecithin, Tetrahexyldecyl Ascorbate, Cetearyl Alcohol, Glycerin, Heparan Sulfate, Polysilicone-11, Tocopheryl Acetate, Hydrogenated Lecithin, Palmitic Acid, Hydroxyacetophenone, Diethylhexyl Syringylidenemalonate, Polyacrylate-13, Butylene Glycol, Epilobium Angustifolium Flower/Leaf/Stem Extract, Mannitol, Ergothioneine, Sclerotium Gum, Lysolecithin, Polyisobutene, Decyl Glucoside, Pullulan, Aminomethyl Propanol, Xanthan Gum, Sodium Stearoyl Glutamate, Fragrance, Polysorbate 20, Propanediol, Ethylhexylglycerin, Phenoxyethanol, Disodium EDTA
We offer free shipping on every order $50+ (just $7 flat-rate below that). Orders placed before 1pm PST Monday through Friday ship out the same day. Orders placed outside of that window are shipped the very next business day!
Changed your mind? We get it. That's why our return window is generous: 30 days even if you've opened and tried it, or a full 60 days if it's still sealed. Some exclusions apply. See our full return policy for details.
What is cysteamine and how does it treat hyperpigmentation?
Cysteamine is a naturally occurring aminothiol compound found in human cells that inhibits tyrosinase, the enzyme responsible for melanin overproduction. It also scavenges free radicals that trigger excess pigmentation. Clinical trials have shown cysteamine to be as effective as or more effective than 4% hydroquinone for correcting hyperpigmentation and melasma, without the risks of long-term hydroquinone use. It does have a distinctive, sulfur-like scent due to its chemical nature — this is normal, expected, and a sign the active is present and potent. The smell rinses away completely.
Is Sente Cysteamine Mask safe for melasma?
Yes. Sente Cysteamine HSA Pigment & Tone Correcting Mask is clinically supported for melasma treatment and is a strong option for clients who need effective tone correction without the long-term concerns associated with hydroquinone. Because melasma is a hormonally driven condition, consistent sun protection must be used alongside any corrective treatment for lasting results. Consistency of use — no less than five days per week — is especially important for melasma, which tends to require the full 12 to 18 week treatment window.
Why do I apply this mask to dry, unwashed skin?
Applying cysteamine to dry, uncleansed skin maximizes the active ingredient's contact with the surface and allows for more efficient delivery to melanin-producing cells. Cleansed or damp skin introduces water and disrupts the skin's natural surface environment, both of which can dilute the formula before it has time to work. The easiest and most effective approach is to apply it first thing in the morning before washing your face — put it on when you wake up, go about your morning for 15 minutes, then rinse and proceed with your normal routine.
How often should I use the Sente Cysteamine Mask, and how long until I see results?
Consistency is everything with this mask. Use it no less than five days per week, ideally daily, for 12 to 18 weeks until your desired results are reached. Most clients begin to see visible improvement in dark spots and overall tone around 8 to 10 weeks, with melasma and deeper pigmentation typically showing significant change by the 12 to 18 week mark. Once you reach your goal, you do not need to stop — simply reduce to twice per week as a maintenance dose to sustain your results. Inconsistent use is the most common reason clients do not achieve the outcomes they expect from this treatment.
Can I use the Sente Cysteamine Mask on my body?
Yes. This mask is effective on any area of the body where discoloration is present, including elbows, knees, and underarms. Apply to dry skin the same way you would on the face and rinse after 15 minutes. For use around the bikini line, mix the mask half and half with a gentle, fragrance-free lotion before applying to dilute the concentration and reduce the potential for sensitivity in that area.
Can I use the Sente Cysteamine Mask if I have sensitive skin?
Yes. Sente Cysteamine HSA Pigment & Tone Correcting Mask is formulated to be well tolerated by sensitive skin types. Cysteamine is a naturally occurring compound with a strong clinical safety profile, and the HSA in the formula supports the skin barrier, making this one of the gentler options available for serious pigmentation correction. If you are new to the formula, begin with five times per week and increase to daily as your skin adjusts.
How does this mask compare to hydroquinone treatments?
Peer-reviewed clinical studies have shown cysteamine to be comparable to or more effective than 4% hydroquinone for treating hyperpigmentation and melasma, without the risks associated with long-term hydroquinone use such as ochronosis, rebound hyperpigmentation, or hormonal disruption concerns. It is considered a safer long-term brightening strategy, particularly for clients who have been on extended hydroquinone regimens and are looking for a way to maintain their results without cycling back onto a prescription.
Why buy Sente Cysteamine HSA Pigment & Tone Correcting Mask from Art of Skin Care?
Art of Skin Care is an authorized retailer of Sente Labs, so every product you receive is 100% authentic, sourced directly through official brand channels and never from third-party resellers. Our team is made up of licensed, acne-certified estheticians who hand-select the products we carry based on real skin science and professional results. We don't just sell skincare; we understand it. Not sure if this product is right for your skin? Get a free skincare consultation and one of our estheticians will personally guide you.
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Senté Cysteamine HSA Pigment & Tone Correcting Mask
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- Skin Tone
- Effectiveness
- Skin Feel
- Value
- KVKelli V. V.Verified BuyerReviewingSenté Cysteamine HSA Pigment & Tone Correcting MaskI recommend this productHow old are you? 50-65What is your skin type? DryWhat is your skin tone? MediumWhat are your skin concerns? Ageing, Pigmentation, Sun DamageRated 5 out of 5 stars13 hours agoAmazing
This is such a commitment! But it has huge payoffs. It has made such a difference in my pigmentation.
Was this helpful? - ASArlo S.Verified BuyerReviewingSenté Cysteamine HSA Pigment & Tone Correcting MaskI recommend this productHow old are you? 40-49What is your skin type? CombinationWhat is your skin tone? FairWhat are your skin concerns? Ageing, SensitivityRated 5 out of 5 stars1 week agoWorks
I have been using for a few weeks and notice a smoother texture and more even tone. The smell is off-putting but great to use before showering.
Was this helpful? - ASArlo S.Verified BuyerReviewingSenté Cysteamine HSA Pigment & Tone Correcting MaskI recommend this productHow old are you? 40-49What is your skin type? CombinationWhat is your skin tone? FairWhat are your skin concerns? Ageing, SensitivityRated 5 out of 5 stars4 weeks agoGreat addition to routine
The smell is really something, but it’s easy to use before getting in the shower and it is helping to lighten pigmentation and overall skin is brighter.
Was this helpful? - KAKelli A.Verified BuyerReviewingSenté Cysteamine HSA Pigment & Tone Correcting MaskI recommend this productHow old are you? 40-49What is your skin type? CombinationWhat is your skin tone? FairWhat are your skin concerns? Blemish-prone, PigmentationRated 5 out of 5 stars1 month agoAmazing results
I have been using this product consistently for only four weeks now and have already noticed great results. My hyperpigmentation spots have diminished and my skin tone has become more even. There is a mild smell to it, but it’s really not that bad. I will definitely continue to use this and highly recommend it.
Was this helpful? - CSCindy S.Verified BuyerReviewingSenté Cysteamine HSA Pigment & Tone Correcting MaskI recommend this productHow old are you? Over 65What is your skin type? CombinationWhat is your skin tone? MediumWhat are your skin concerns? Blemish-prone, WrinklesRated 5 out of 5 stars1 month agoSlow Fade
I am using the Sente mask on my forearms to slowly fade my sun damage. What’s great, is no irritation with my eczema. That’s a win to me.
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