AMZ Serum Smooth & Silky 20ml
Fine, flat hair that won’t hold volume? This AMZ product adds body without the sticky, crunchy feeling.
Comes in a 20ml size, which should last you a good while depending on how often you use it.
What Makes This One Different
- AMZ — a brand that’s been in the hair care space for a while
- 20ml — decent size for the price
- All hair types — works on straight, wavy, curly, coily, color-treated, you name it
How to Use It
Here’s how to use it: put a few drops on your fingertips, massage into the scalp where you need it most, and let it absorb. No rinsing needed. Do this consistently — once or twice a day — and give it at least 4-6 weeks before judging results.
The Honest Truth
Don’t expect overnight results — hair grows slow. But if you give this a fair shot over 4-8 weeks, most people see something positive happening.
Looking for a reliable hair serum? The AMZ hair serum (20ml) is a popular pick for good reason. Browse our full selection of hair thickening volumizing to compare options and find the right fit for your hair.
Abigail Anderson (verified owner) –
I noticed changes faster than I expected – within two weeks my hair felt different. I section my hair and apply it precisely where I’m seeing the most thinning. Even in dry weather, my hair stays hydrated and doesn’t get that crackly texture. Can’t recommend this enough for anyone struggling with their hair.
Layla Scott (verified owner) –
I noticed improvement after about three weeks of consistent use – not dramatic but real. I apply this directly to my scalp twice a day – morning and before bed. I can tell the biotin is doing something, I just wish the overall formula was a bit more potent. There are baby hairs coming in along my temples – progress is real but gradual. My hair is definitely more hydrated, though I need to reapply every couple of days. It took about 8 weeks of consistent use to really see the difference, so don’t give up if you don’t notice changes in the first few days. Worth trying if you’re looking for something in this category.
Amelia Ramirez (verified owner) –
My hairdresser actually commented on how much healthier my hair looks since I started using this. I apply it with a dropper along my part and massage with my fingertips. The regrowth along my temples is visible enough that friends have asked what I’m using. I’ve already repurchased and will keep this in my routine indefinitely.
Isaiah Harris (verified owner) –
Meh. scalp is minimal after a month. biotin doesn’t seem concentrated enough.
Victoria White –
I’m in my 40s and my hair has been thinning steadily – this gave me hope again. I section my hair and apply it precisely where I’m seeing the most thinning. The regrowth along my temples is visible enough that friends have asked what I’m using. If you’re on the fence, just try it. You won’t regret it.
Jack Perez (verified owner) –
I bought this on a recommendation from a friend and I’m so glad I did. I section my hair and apply it precisely where I’m seeing the most thinning. Since biotin is a key ingredient, I feel confident this is doing something real, not just coating my hair. I’m losing way fewer hairs when I style – the tensile strength has definitely improved. The regrowth along my temples is visible enough that friends have asked what I’m using. The key with any hair care product is consistency – I made it part of my daily routine and stuck with it for 6 weeks before judging the results. Definitely worth the investment for anyone dealing with similar hair concerns.
Sebastian Davis –
I’m in my 40s and my hair has been thinning steadily – this gave me hope again. I use it as a targeted treatment on my thinning areas along my hairline. My roots have actual lift now instead of lying flat against my scalp by noon. If you’re on the fence, just try it. You won’t regret it.
Noah Taylor (verified owner) –
My partner noticed the difference before I even said anything about using a new product. I use it as a targeted treatment on my thinning areas along my hairline. I’m seeing real density improvement at my crown where my scalp used to show through. This product restored my confidence in my hair.
Emma Martin (verified owner) –
After postpartum hair loss wrecked my confidence, this product helped me feel like myself again. I section my hair and apply it precisely where I’m seeing the most thinning. I can see my hair has more body and bounce, especially at the roots. Do yourself a favor and get this.
Mia Moore (verified owner) –
My partner noticed the difference before I even said anything about using a new product. I use it on clean dry scalp and don’t wash my hair for 24 hours after. The moisture balance is perfect – not greasy at the roots, not dry at the ends. This is the real deal – not another overhyped product.
Alexander King (verified owner) –
The difference in my hair texture and growth is something I can actually see and feel. I use it on clean dry scalp and don’t wash my hair for 24 hours after. The irritation from other products disappeared once I switched to this. Do yourself a favor and get this.
Daniel Anderson (verified owner) –
The difference in my hair texture and growth is something I can actually see and feel. I incorporate it into my nightly routine – consistency is what made the difference. My hair doesn’t snap off when I brush it anymore – the breakage is practically gone. I only wish I’d started using it sooner.
Layla Sanchez (verified owner) –
Not bad, not great. strength is barely noticeable after weeks of use.
Lily Flores (verified owner) –
Visible scalp after 4 weeks. The biotin formula is excellent.
Jayden Lee (verified owner) –
Visible volume after 4 weeks. The biotin formula is excellent.
Sophia Torres (verified owner) –
Actually works. My scalp feels healthier and I see new growth. The biotin makes a difference.
Matthew Gonzalez (verified owner) –
I’ve seen enough improvement to keep using it, though it’s not a miracle product. I apply this directly to my scalp twice a day – morning and before bed. Breakage has reduced significantly but I still see some snapping when I use high heat. I’m satisfied enough to repurchase, which says something.
John Walker (verified owner) –
Actually works. My scalp feels healthier and I see new growth. The biotin makes a difference.
Elijah Hernandez (verified owner) –
I was ready to see a dermatologist about my hair loss but this has been working so well I haven’t needed to. I section my hair and apply it precisely where I’m seeing the most thinning. I specifically wanted something with biotin because I’d read about its benefits for hair health, and this delivers. I can run a comb through my hair without hearing that horrible snapping sound. I can see new baby hairs sprouting along my hairline where it had been thinning. For anyone just starting, give it at least 7 weeks before deciding if it works for you. Hair growth cycles are slow. If you’re on the fence, just try it. You won’t regret it.
Harper Hernandez –
This works well overall but there are a couple of things I’d change about it. I apply it with a dropper along my part and massage with my fingertips. I can tell the biotin is doing something, I just wish the overall formula was a bit more potent. I’m seeing some new growth, though it’s been slower than I hoped. The cooling sensation is nice but the relief is temporary – I need to reapply. It took about 4 weeks of consistent use to really see the difference, so don’t give up if you don’t notice changes in the first few days. I’m satisfied enough to repurchase, which says something.
Layla Miller (verified owner) –
Solid product. Does what it says. Just wish it worked a little faster. I apply this directly to my scalp twice a day – morning and before bed. The biotin is a nice touch – I think it contributes to the results I’m seeing. I’m seeing some new growth, though it’s been slower than I hoped. My ends are healthier than before, though not completely split-free. It took about 7 weeks of consistent use to really see the difference, so don’t give up if you don’t notice changes in the first few days. I’d buy it again, though I’d love to see them improve a few things.
John Miller (verified owner) –
I was skeptical at first because I’ve been burned by so many products before, but this one really delivers. I apply this directly to my scalp twice a day – morning and before bed. The difference in fullness is noticeable in photos – my hair looks denser. Honestly the best hair product purchase I’ve made this year.
Leah Smith (verified owner) –
I’d give this 4.5 stars if I could. It’s very good but not quite perfect. I section my hair and apply it precisely where I’m seeing the most thinning. Reduced my flaking by about 70% – not completely gone but much better. Worth trying if you’re looking for something in this category.
Grace Wright (verified owner) –
No more shedding and my roots look fuller. This product delivers.
Lily White (verified owner) –
I’ve seen enough improvement to keep using it, though it’s not a miracle product. I apply it with a dropper along my part and massage with my fingertips. I can see a difference in fullness but it’s not as dramatic as some reviews suggest. I’d recommend it with the caveat that you need to be patient and consistent.
Stella Thompson (verified owner) –
This has earned a permanent spot in my hair care routine. Can’t imagine being without it now. I use it on clean dry scalp and don’t wash my hair for 24 hours after. Even my stylist commented that my hair feels thicker when she works with it. Can’t recommend this enough for anyone struggling with their hair.
Eleanor Rodriguez (verified owner) –
I was ready to see a dermatologist about my hair loss but this has been working so well I haven’t needed to. I use it on clean dry scalp and don’t wash my hair for 24 hours after. The regrowth along my temples is visible enough that friends have asked what I’m using. Can’t recommend this enough for anyone struggling with their hair.
Victoria Hernandez (verified owner) –
The difference in my hair texture and growth is something I can actually see and feel. I use it as a targeted treatment on my thinning areas along my hairline. The biotin is what sets this apart from other products I’ve used – you can feel the quality. My ends feel strong and healthy instead of frayed and split. My part looks noticeably narrower than it did two months ago. The key with any hair care product is consistency – I made it part of my daily routine and stuck with it for 6 weeks before judging the results. Can’t recommend this enough for anyone struggling with their hair.
Amelia Flores (verified owner) –
After postpartum hair loss wrecked my confidence, this product helped me feel like myself again. I apply it with a dropper along my part and massage with my fingertips. The biotin is what sets this apart from other products I’ve used – you can feel the quality. My scalp feels balanced – not oily, not dry, just healthy. The shedding in the shower has reduced dramatically – maybe 80% less hair in the drain. The key with any hair care product is consistency – I made it part of my daily routine and stuck with it for 8 weeks before judging the results. If you’re on the fence, just try it. You won’t regret it.
Ava Hernandez (verified owner) –
I’ve recommended this to three people already because the results speak for themselves. I apply this directly to my scalp twice a day – morning and before bed. I’m seeing real density improvement at my crown where my scalp used to show through. I only wish I’d started using it sooner.
Joseph Allen –
I’ve been struggling with thinning hair for years and this is the first thing that actually made a visible difference. I apply this directly to my scalp twice a day – morning and before bed. I can run a comb through my hair without hearing that horrible snapping sound. If you’re on the fence, just try it. You won’t regret it.
Noah Robinson (verified owner) –
Wish I had found this years ago. My hair feels completely different now. I apply this directly to my scalp twice a day – morning and before bed. I can see my hair has more body and bounce, especially at the roots. I’ve already repurchased and will keep this in my routine indefinitely.
Nora Garcia (verified owner) –
I bought this on a recommendation from a friend and I’m so glad I did. I apply it with a dropper along my part and massage with my fingertips. The elasticity is back – my hair bends without breaking. Definitely worth the investment for anyone dealing with similar hair concerns.
Amelia Davis (verified owner) –
Mediocre results with scalp. I’ll finish the bottle but probably won’t repurchase.
Avery Lopez (verified owner) –
Wish I had found this years ago. My hair feels completely different now. I section my hair and apply it precisely where I’m seeing the most thinning. Since biotin is a key ingredient, I feel confident this is doing something real, not just coating my hair. My dry, brittle ends have transformed into something that actually feels soft and hydrated. The irritation from other products disappeared once I switched to this. The key with any hair care product is consistency – I made it part of my daily routine and stuck with it for 8 weeks before judging the results. Honestly the best hair product purchase I’ve made this year.
Addison Sanchez (verified owner) –
I noticed improvement after about three weeks of consistent use – not dramatic but real. I use it on clean dry scalp and don’t wash my hair for 24 hours after. My roots have more lift than before, though I need to use it consistently to maintain the effect. I’m satisfied enough to repurchase, which says something.
Luna Martin (verified owner) –
Happy with the scalp. Wish it worked faster but it does work.
Daniel Torres (verified owner) –
I bought this on a recommendation from a friend and I’m so glad I did. I use it on clean dry scalp and don’t wash my hair for 24 hours after. I love that this contains biotin – it’s one of the few ingredients that’s actually been studied for hair growth. I’m seeing real density improvement at my crown where my scalp used to show through. The difference in fullness is noticeable in photos – my hair looks denser. For anyone just starting, give it at least 7 weeks before deciding if it works for you. Hair growth cycles are slow. This product restored my confidence in my hair.
Camila Jones (verified owner) –
No more shedding and my roots look fuller. This product delivers.
William Young –
Decent product. growth is noticeable after about 3 weeks of use.
Mila Hill –
I noticed improvement after about three weeks of consistent use – not dramatic but real. I apply it with a dropper along my part and massage with my fingertips. I’d estimate about 60-70% less breakage since I started using this. I’d buy it again, though I’d love to see them improve a few things.
James Perez (verified owner) –
I was ready to see a dermatologist about my hair loss but this has been working so well I haven’t needed to. I apply it with a dropper along my part and massage with my fingertips. I’m losing way fewer hairs when I style – the tensile strength has definitely improved. Honestly the best hair product purchase I’ve made this year.
Ryan Martin (verified owner) –
I was skeptical at first because I’ve been burned by so many products before, but this one really delivers. I use it as a targeted treatment on my thinning areas along my hairline. The shedding in the shower has reduced dramatically – maybe 80% less hair in the drain. If you’re on the fence, just try it. You won’t regret it.
Liam Young (verified owner) –
My hairdresser actually commented on how much healthier my hair looks since I started using this. I incorporate it into my nightly routine – consistency is what made the difference. My hair doesn’t snap off when I brush it anymore – the breakage is practically gone. I only wish I’d started using it sooner.
Riley Miller (verified owner) –
Five stars. biotin is key – my hair has never looked better.
Jack Torres (verified owner) –
The difference in my hair texture and growth is something I can actually see and feel. I use it as a targeted treatment on my thinning areas along my hairline. I can see my hair has more body and bounce, especially at the roots. Honestly the best hair product purchase I’ve made this year.
Riley Wilson (verified owner) –
My hairdresser actually commented on how much healthier my hair looks since I started using this. I use it as a targeted treatment on my thinning areas along my hairline. My hair doesn’t feel like straw anymore – it’s genuinely moisturized from root to tip. Do yourself a favor and get this.
Amelia Hernandez (verified owner) –
After postpartum hair loss wrecked my confidence, this product helped me feel like myself again. I apply this directly to my scalp twice a day – morning and before bed. My hair doesn’t feel like straw anymore – it’s genuinely moisturized from root to tip. I’ve already repurchased and will keep this in my routine indefinitely.
Jacob Robinson (verified owner) –
I’ve seen enough improvement to keep using it, though it’s not a miracle product. I apply this directly to my scalp twice a day – morning and before bed. My hair feels denser than before, though the change isn’t dramatic. Not perfect but definitely above average.
Adrian Scott (verified owner) –
Works well for growth. Not instant but steady progress. Would repurchase.
Lucas Miller (verified owner) –
My partner noticed the difference before I even said anything about using a new product. I use it as a targeted treatment on my thinning areas along my hairline. The biotin is what sets this apart from other products I’ve used – you can feel the quality. The difference in fullness is noticeable in photos – my hair looks denser. I can run a comb through my hair without hearing that horrible snapping sound. It took about 6 weeks of consistent use to really see the difference, so don’t give up if you don’t notice changes in the first few days. Five stars without hesitation.
Addison King (verified owner) –
I’ve been using it consistently for a month and the results are underwhelming so far. I incorporate it into my nightly routine – consistency is what made the difference. I wish the biotin was higher concentration – might explain the mediocre results. My hair feels coated rather than genuinely stronger. The effect is barely noticeable on my fine hair. Patience is important with hair products. I gave it 9 weeks before writing this review. Three stars because it technically does something, just not enough.
Addison Johnson –
The difference in my hair texture and growth is something I can actually see and feel. I apply this directly to my scalp twice a day – morning and before bed. I love that this contains biotin – it’s one of the few ingredients that’s actually been studied for hair growth. The moisture balance is perfect – not greasy at the roots, not dry at the ends. I don’t get that tight, itchy feeling anymore, even between washes. For anyone just starting, give it at least 6 weeks before deciding if it works for you. Hair growth cycles are slow. This is the real deal – not another overhyped product.
Daniel Miller (verified owner) –
I’ve been struggling with thinning hair for years and this is the first thing that actually made a visible difference. I incorporate it into my nightly routine – consistency is what made the difference. I can see my hair has more body and bounce, especially at the roots. Five stars without hesitation.
Emily Hernandez (verified owner) –
After postpartum hair loss wrecked my confidence, this product helped me feel like myself again. I use it as a targeted treatment on my thinning areas along my hairline. Even in dry weather, my hair stays hydrated and doesn’t get that crackly texture. Do yourself a favor and get this.
Lillian Hill (verified owner) –
I bought this on a recommendation from a friend and I’m so glad I did. I section my hair and apply it precisely where I’m seeing the most thinning. I don’t get that tight, itchy feeling anymore, even between washes. I’ve already repurchased and will keep this in my routine indefinitely.
James Hernandez (verified owner) –
I’ve been struggling with thinning hair for years and this is the first thing that actually made a visible difference. I use it as a targeted treatment on my thinning areas along my hairline. Even my stylist commented that my hair feels thicker when she works with it. I’ve already repurchased and will keep this in my routine indefinitely.
Alexander Walker (verified owner) –
The difference in my hair texture and growth is something I can actually see and feel. I incorporate it into my nightly routine – consistency is what made the difference. I’m seeing real density improvement at my crown where my scalp used to show through. Definitely worth the investment for anyone dealing with similar hair concerns.
Christian Allen (verified owner) –
Actually works. My scalp feels healthier and I see new growth. The biotin makes a difference.
Ava Lee (verified owner) –
Three stars. Does something for moisture but not enough to justify the price.
Christian Perez (verified owner) –
I’d give this 4.5 stars if I could. It’s very good but not quite perfect. I section my hair and apply it precisely where I’m seeing the most thinning. My dry ends have improved, though the effect doesn’t last as long as I’d like. Good product overall – I’ll keep using it and see if results improve over time.
Elijah Brown (verified owner) –
Worth every penny. volume within a month of daily use.
Aaron Thomas (verified owner) –
My partner noticed the difference before I even said anything about using a new product. I use it as a targeted treatment on my thinning areas along my hairline. My scalp feels balanced – not oily, not dry, just healthy. I’ve already repurchased and will keep this in my routine indefinitely.
Sophia Davis –
After postpartum hair loss wrecked my confidence, this product helped me feel like myself again. I use it as a targeted treatment on my thinning areas along my hairline. I specifically wanted something with biotin because I’d read about its benefits for hair health, and this delivers. The hydration lasts for days between washes instead of evaporating by day two. My scalp feels balanced – not oily, not dry, just healthy. The key with any hair care product is consistency – I made it part of my daily routine and stuck with it for 6 weeks before judging the results. Definitely worth the investment for anyone dealing with similar hair concerns.