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Summary
Unlock the secret to thicker, fuller hair with Nioxin Diamax Advanced Hair Thickening Serum, proven to instantly boost hair diameter and protects hair against breakage, allowing it to grow longer* (with daily use).
Benefits
- Fuller, Thicker-Looking Hair: Nioxin Intensive Diamax Advanced is a hair thickening treatment that enhances the appearance of fuller, thicker hair.
- Boosts Hair Diameter: This advanced formula boosts the diameter of each individual hair strand, creating a voluminous and thicker look.
- Strengthens and Protects: The treatment strengthens and protects the hair, reducing breakage and promoting healthier, more resilient strands.
- Nourishes and Energizes the Scalp: Diamax Advanced nourishes the scalp, providing essential nutrients and energizing the hair follicles for improved hair growth.
- Suitable for All Hair Types: Diamax Advanced is suitable for all hair types and can be used daily as part of your hair care routine.
Item 2623051
- Apply a small amount of the serum directly to your scalp.
- Gently massage the serum into your scalp using circular motions.
- Do not rinse out.
- For best results, use daily as part of your hair care routine.
Pre-caution: Do not get into the eyes. Keep out of reach of children. For any questions or concerns about side effects, always consult a medical professional.
Alcohol Denat., Aqua/Water/ Eau, Niacinamide, Peg/Ppg-20/23 Dimethicone, Caffeine, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Parfum/Fragrance, Glycerin, Tetrahydroxypropyl Ethylenediamine, Mentha Arvensis Leaf Oil, Mentha Piperita (Peppermint) Oil, Peg-30 Dipolyhydroxystearate, Benzyl Salicylate, Hexyl Cinnamal, Trideceth-6, Alpha-Isomethyl Ionone, Limonene, Linalool, Citronellol.
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Questions
Ask a QuestionQ&A
Showing 20 out of 54 Questions
- Q
My hair is so thin and I am a diabetic, which is really bad for your hair anyway. My hair has broken off in CHUNKS! It looks horrible and is HUMILIATING! I don't even leave my house anymore!😢. I am using the generic form of Rogaine- for women, can I use this also? Or should I just use one or the other? Brittle and breakage...I mean SERIOUS BREAKAGE is my issue plus my hair is extremely fine/thin so it looks even worse and is more noticeable. It broke off behind/above ears, all around crown and some underneath!! Help! Any other ideas? Or advice? I'm all ears! No pun intended ugggh!
- Asked by Annie
- Official Answer By Nioxin - Brand EngageYou may use this product along with Rogaine. Yo may want to get your hair tripped to help even things out, give the style a shape, and removing split ends.Was this answer helpful to you
- Q
Does this work if I let my hair dry naturally? Also, is this thickening only temporary or does it actually help thicken each strand of hair after long term use?
- Asked by Mel
- Official Answer By Nioxin - Brand EngageIt works best as a styling aid when blown dry to reach full potential. It does penetrate each hair making it thicker stronger and protecting it against damage. A wonderful 2-in-1 product.Was this answer helpful to you
- Q
Can you tell me The differences between this advanced product and the regular one?
- Asked by frankie
- Official Answer By Nioxin - Brand EngageThe main difference is that the Advanced will provide up to 8 hours of the look and feel of having 11,000 more strands of hair on your head. Was this answer helpful to you
- Q
Is this a styling product or a treatment product?
- Asked by Frankie
- Official Answer By Nioxin - Brand EngageIt is both! It penetrates each hair strand making it thicker fuller and strengthened against breakage, while it gives added volume and definition to hair that is blown dry after application. This is truly a remarkable product.Was this answer helpful to you
- Q
I have the 3 piece kit, 3-D root booster, night density rescue & diamax advanced. I only wash my hair every other day. What products can I use day and night on days when I don't wash my hair & in what order should I apply them? Thanks!
- Asked by Sally
- Official Answer By Nioxin - Brand EngageThe Diamax Advanced should only be used before blow drying and styling your hair. The 3-D Root Booster should be used twice daily. And the night density rescue is to be used at night. In the morning I would recommend applying the Root Booster prior to the Diamax. On days that you shampoo in the morning use all of the system kit products prior to applying the Root Booster and Diamax. In the evening apply the Hair Booster followed by the Night density Rescue. If you are shampooing in the evening apply products in the following order: Shampoo, Conditioner, Root Booster, Scalp & Hair Treatment then the Night Density Rescue. Was this answer helpful to you
- Q
Would this styling product replace the nioxin styling foam I have been using and does it have a heat protectant ?
- Asked by penny
- Official Answer By Nioxin - Brand EngageThe Diamax could replace the current product or be used in addition to it. Diamax does not have hold to it, it provides volume and thickness instead. So you may want to keep your foam or add the thermal active spray to receive the hold and heat protection you are looking for.Was this answer helpful to you
- Q
The video shows a woman spraying this product on, while mine is more the consistency of gel. Do I have a bad batch? If not, do I just apply it like I would a gel or a mousse? This stuff's expensive and I want to be sure I'm using it correctly.
- Asked by Jen
- Official Answer By Nioxin - Brand EngageApply to clean, damp hair directly at the roots. Massage in for 1-minutes, comb through hair then style as usual. This should be the consistency of a liquid gel, for reference. To avoid over use, do not work though the hair as you would a gel or mouse.Was this answer helpful to you
- Q
would this work for my hair. It is very thin and more so on the top. I can't get it to grow past my shoulders. A little afraid to try this without knowing much about it.
- Asked by Kayla
- Official Answer By Nioxin - Brand EngageThis is a combination of styling product and treatment for your hair. It will give you volume and the look and feel of having more hair on your head. In addition, it penetrates your hair shaft making you hair stronger and defending against breakage. I have head wonderful reports about this product. I think you should try it and see for yourself. Save your receipt, in case you do not love it, you can return it and get your money back within 60-days of purchase. Was this answer helpful to you
- Q
I have noticed my hair is starting to thin out near my face/forehead area, and I have some breakage. Am I able to solely use this product, or do I have to purchase another product to go with it?
- Asked by Jordan
- Official Answer By Nioxin - Brand EngageYou can use this product as a stand alone styling aid/ treatment. This product thickens each individual strand of hair and adds volume for up to 8-hours. It works wonders. However it will not assist with the thinning you are experiencing. Yo may want to look into our system kits for assistance with maintaining your current amount of hair and promoting new growth. Please call Nioxin Technical support at 800-935-5273 for additional information and product recommendations.Was this answer helpful to you
- Q
Hi! I am currently using Nixion System 2, I am between buying this product or the System 2 leave in. Which one would be a better fit ?
- Asked by kmo
- Official Answer By Nioxin - Brand EngageDiamax is a styling aid as well as a treatment to create volume and increase the density of each hair strand. The Scalp & Hair Treatment stimulates the blood flow on scalp promoting hair growth. Both great products, but very different from one another. Please call Nioxin Technical support at 800-935-5273 for additional information and product recommendations. Was this answer helpful to you
- Q
Would this styling product replace the nioxin styling foam I have been using and does it have a heat protectant ?
- Asked by penny
- Official Answer By Nioxin - Brand EngageThe Diamax could replace the current product or be used in addition to it. Diamax does not have hold to it, it provides volume and thickness instead. So you may want to keep your foam or add the thermal active spray to receive the hold and heat protection you are looking for.Was this answer helpful to you
- Q
The video shows a woman spraying this product on, while mine is more the consistency of gel. Do I have a bad batch? If not, do I just apply it like I would a gel or a mousse? This stuff's expensive and I want to be sure I'm using it correctly.
- Asked by Jen
- Official Answer By Nioxin - Brand EngageApply to clean, damp hair directly at the roots. Massage in for 1-minutes, comb through hair then style as usual. This should be the consistency of a liquid gel, for reference. To avoid over use, do not work though the hair as you would a gel or mouse.Was this answer helpful to you
- Q
would this work for my hair. It is very thin and more so on the top. I can't get it to grow past my shoulders. A little afraid to try this without knowing much about it.
- Asked by Kayla
- Official Answer By Nioxin - Brand EngageThis is a combination of styling product and treatment for your hair. It will give you volume and the look and feel of having more hair on your head. In addition, it penetrates your hair shaft making you hair stronger and defending against breakage. I have head wonderful reports about this product. I think you should try it and see for yourself. Save your receipt, in case you do not love it, you can return it and get your money back within 60-days of purchase. Was this answer helpful to you
- Q
I have noticed my hair is starting to thin out near my face/forehead area, and I have some breakage. Am I able to solely use this product, or do I have to purchase another product to go with it?
- Asked by Jordan
- Official Answer By Nioxin - Brand EngageYou can use this product as a stand alone styling aid/ treatment. This product thickens each individual strand of hair and adds volume for up to 8-hours. It works wonders. However it will not assist with the thinning you are experiencing. Yo may want to look into our system kits for assistance with maintaining your current amount of hair and promoting new growth. Please call Nioxin Technical support at 800-935-5273 for additional information and product recommendations.Was this answer helpful to you
- Q
Hi! I am currently using Nixion System 2, I am between buying this product or the System 2 leave in. Which one would be a better fit ?
- Asked by kmo
- Official Answer By Nioxin - Brand EngageDiamax is a styling aid as well as a treatment to create volume and increase the density of each hair strand. The Scalp & Hair Treatment stimulates the blood flow on scalp promoting hair growth. Both great products, but very different from one another. Please call Nioxin Technical support at 800-935-5273 for additional information and product recommendations. Was this answer helpful to you
- Q
Hello, I don't know which product is good for me I'm scared to apply for my hair I loss my hair because of my illness I was sick I take lots of strong medications I had nice long hair so please send me nice products name I can buy Thank you very much.
- Asked by Patel
- Official Answer By Nioxin - Brand EngageI am sorry to hear about your hair loss. Please call Nioxin Technical support at 800-935-5273 for additional information and product recommendations. we would be able to help find you the best products by speaking with you more in depth about your hair.Was this answer helpful to you
- Q
Hi!! I have processed hair, it's fine more on the sides of my head and breaks easily. I want something that gives me volume and make it grow.I use sulfate free products. I wanted to get the shampoo/conditioner but they're not sulfate free am I right? If so, I was thinking in get the diamax serum and the blue bottle the one that has to be use and night. Are any of those for what I'm looking for? Can I use both or only with 1 will be enough? If so which one? Thanks
- Asked by Kamy
- Official Answer By Nioxin - Brand EngageThankyou for reaching out. Diamax sounds like a good fit for your needs. It is proven to increase the diameter of each hair strand, penetrating and leaving it fuller, more mananageable and strengthened against breakage. I would recommend using this product for a week or two before adding another product to your daily regimine. This way you will know what works prior to spending additional money and not knowing if which product you do or do not like. Once you get a feel for the Diamax feel free to add in the Night Density rescue in the evenings. As you mentioned not using our other products due to them containing sulfates, I just want to add that Nioxin uses high quality sulfates to provide a good cleansing. As for color treated hair, we have the Pro-Color Shield technology to prolong hair color. Please call Nioxin Technical support at 800-935-5273 for additional information and product recommendations. Was this answer helpful to you
- Q
Is this product recommended for African American kinky hair? I have use various products of nioxin and had no issues.
- Asked by Bossandhustle
- Official Answer By Nioxin - Brand EngageThank you for reaching out. This product is good for all hair types. Keep your receipt after purchase you have 60-days to decide if you love the product. If in that time you decide that it isn't a good fit for you, you may receive your money back.Was this answer helpful to you
- Q
I found production date on the product. Does it have expiry date?
- Asked by Mido
- Official Answer By Nioxin - Brand EngagePlease call 920-944-3529 and we will gladly help you read the batch code to determine if you are within the 3-year shelf life of the productWas this answer helpful to you
- Q
Do I have to blow dry/heat style my hair while using this product? I prefer to air dry because my hair is very long and "sensitive," for lack of a better word. Thank you for taking the time to answer!
- Asked by lovemeganjoy
- Official Answer By Nioxin - Brand EngageIf you use a blow dryer just at the roots for a few seconds to heat up the product you to receive the best fullest results. You may use it without heat, just know you will get results, just not optimal liftWas this answer helpful to you
Reviews
Write A REVIEWReview Snapshot
by PowerReviews
Ratings Distribution
My Beauty Routine Takes
Best Uses
Describe Yourself
Hair Type
Most Helpful Positive Review
Really Actually Works
I'm in my 50's and my hair is beginning to thin in certain areas. I've always had very thick, but fine, hair so I've never had to deal with thinning hair. This product actually made my hair feel thicker from the very beginning in the areas I was concerned about. It made my hair feel denser yet soft ...
Most Helpful Critical Review
Another hair treatment
My hairdresser recommended this product. Shortly after applying, it does soak in and dry up nicely. I do not like the smell, but I am also sensitive to perfumes in laundry detergents, so I buy the ones that are "fragrance free". I do not like the instructions at all. Every product Nioxin makes, says...
404 results
Do they not think we notice
I've been using this product for a while do company/manufacturers not realize that we noticed they're watering down products and making them ineffective? Rhetorical question
They changed the ingredients; added caffeine
Hair Type Straight Hair
Used to love this product. I get migraines and caffeine is a trigger. Ingredient change not clearly stated on the new bottle design. My migraines markedly increased after a few days use. Can't return because return date expired. Huge waste of money.
Another hair treatment
Verified Reviewer
Reviewed at

My hairdresser recommended this product. Shortly after applying, it does soak in and dry up nicely. I do not like the smell, but I am also sensitive to perfumes in laundry detergents, so I buy the ones that are "fragrance free". I do not like the instructions at all. Every product Nioxin makes, says to use daily, but there is no instruction for mixing them, or how far to space them apart. Combined with the high price, it is obvious to me that Nioxin's primary concern is to sell as much as they can. Lastly, the ingredients don't look to be anything out of the ordinary. It does have a slight tingling sensation, so I hope it is doing something positive for hair growth, and hair loss prevention.

Like the way it feels
Verified Reviewer
Reviewed at

Just bought it I put on dry hair makes hair feel good and full
Disappointing
Hair Type Straight Hair
Very disappointed in this product. Ulta was out of the usual mist type Nioxin thickening spray that I use so thought I would try this one. It was gummy, sticky & weighed my thin hair down. Also, my hair had do much static I had to use hair paste to keep it down & a ton of hairspray. Waste of $$$$!