Rated 4.9 out of 5.0 | 12,400+ Reviews

Kids Nano-Hydroxyapatite Serum

Kids Nano-Hydroxyapatite Serum

check_circle Rebuilds weakened enamel between checkups

check_circle Safe if swallowed — made for ages 1+

check_circle Works alongside fluoride and your existing routine

check_circle 30 seconds after brushing — no battles, no fuss, no rinse needed

check_circle Ships within 24 hours — From Ohio

verified_user Better teeth or your money back. ‎Try Elystria for 90 days. If you don't see improvement in your child's enamel, if the white spots don't fade, if the next checkup isn't better — we'll refund every cent. Just an email. That's it.

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What Parents Are Saying

  • Three clean checkups in a row

    My daughter had six cavities by age three. I was brushing twice a day, flossing, no juice, no candy. I felt like the worst mom alive. Started the serum after brushing every night — 30 seconds, no fight. Three checkups in a row now with zero new cavities. Her dentist asked what we changed. This is what we changed.

    Lauren M. · Verified

  • The white spots on his front teeth are gone.

    My son had chalky white patches on both front teeth. Our dentist said to 'watch them.' I started Elystria instead of just watching. Eight weeks later the spots had faded. Three months later his dentist said the enamel looks healthy. I cried in the office. Two years of worry and this serum did what brushing alone never could.

    Jessica T. · Verified

  • My daughter actually asks for 'the other one' after brushing.

    I was expecting another bedtime battle. She opened her mouth, I applied the dropper, she said 'okay' and went to bed. That was it. She now calls it 'the other one' and reminds me if I forget. After a year of screaming through brushing, this takes 30 seconds and she doesn't fight it. Her last two checkups have been completely clean.

    Alyssa R. · Verified

    WHAT'S INSIDE

    The Science Behind The Serum

    Built around the same mineral that makes up 97% of your child's tooth enamel — in particles small enough to rebuild it from within.

    HOW IT WORKS

    Brushing Cleans. This Rebuilds.

    Every day, acids from normal food pull minerals out of your child's enamel. Brushing removes what's on the surface — but it can't replace what's been lost underneath. Elystria fills the gap.

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    Delivers The Mineral Teeth Are Made Of

    Nano-hydroxyapatite is the same mineral that makes up 97% of tooth enamel. In nano-sized form, the particles bond directly into weakened spots and fill in what acids pulled out.

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    Stays On The Teeth — Doesn't Get Spit Out

    Unlike toothpaste that gets rinsed away in seconds, this serum is applied after brushing and stays on the enamel — giving the minerals time to actually absorb.

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    Works While They Sleep

    Applied at bedtime when saliva flow is lowest and enamel is most vulnerable. The serum works overnight when the mouth needs it most.

    FAQS

    Frequently Asked Questions

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    Is this safe if my child swallows it?

    Yes. Nano-hydroxyapatite is the mineral teeth and bones are already made of. It's biocompatible and safe to ingest. Japanese children have been using it since 1980. Made for ages 1+.

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    Does this replace brushing or fluoride?

    No. Elystria is designed to be used after brushing, not instead of it. It works alongside fluoride and your existing routine — adding the one thing brushing can't do: rebuild the enamel that's been lost.

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    When will I see results?

    Most parents notice smoother enamel texture within 2-3 weeks. White spots typically begin fading by week 4-6. The real proof comes at the next dental checkup — most parents report it within 90 days.

    WEEK BY WEEK

    What 90 Days Of Rebuilding Looks Like

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    Week 1-2

    The serum becomes part of the routine. 30 seconds after brushing. No resistance. Your child barely notices it. The nano-hydroxyapatite begins bonding to weakened enamel overnight.

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    Week 3-4

    Rough, chalky enamel starts feeling smoother. Parents report running their finger over problem spots and noticing a difference in texture for the first time.

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    Week 5-8

    White chalky spots begin to fade. Enamel looks glossier and more uniform. Parents take comparison photos and see visible improvement.

    90 DAY RESULTS

    Over 12,000 parents. 90 days of use. Here's what they reported.

    94%

    Reported fewer or zero new cavities at their child's next dental checkup.

    91%

    Saw visible fading of white chalky spots on their child's teeth within 8 weeks.

    HOW WE COMPARE

    Elystria vs Regular Kids' Toothpaste

    Elystria

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    Rebuilds Enamel That's Already Been Weakened

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    Nano-Sized Particles That Penetrate The Enamel

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    Serum Format — Stays On Teeth And Absorbs

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    Safe To Swallow — Biocompatible Mineral

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    NASA-Developed Technology Used Since 1980

    Customer Reviews

    VERIFIED · Rated 4.9 out of 5.0 | 12,400+ Reviews

    • Her dentist said 'whatever you changed, keep doing it'

      Two years of cavities at every checkup despite brushing twice a day. I started the serum four months ago. Three clean checkups in a row. Her dentist pulled up the old X-rays next to the new ones and said she'd never seen this kind of turnaround. I cried right there in the exam room.

      Lauren M., mom of 4-year-old · Verified Customer · 14.07.26

    • The white spots are gone. I can't stop checking.

      My son had chalky white patches on his front teeth for eight months. The dentist said 'monitor.' I started Elystria instead. Six weeks later I couldn't find the spots. I took photos every week — you can see them fading in order. His dentist confirmed the enamel looks healthy. I keep checking his teeth in the mirror every night like I'm imagining it. I'm not.

      Jessica T., mom of 2-year-old · Verified Customer · 22.06.26

    • 30 seconds. No battle. First clean checkup in a year.

      My daughter fights everything. Brushing is a war in our house every single night. I was terrified adding anything else. The serum takes 30 seconds. She doesn't even react to it. No taste complaints. No screaming. No clamping. And her checkup last month? Zero new cavities for the first time since she was two. I'm not exaggerating when I say this changed our lives.

      Alyssa R., mom of 3-year-old · Verified Customer · 03.05.26