Is Synadentix worth it?
Doesn't add up (4.4/10). Synadentix prints a real Supplement Facts panel, but the whole formula sits in one 400 mg proprietary blend, so the amount of each enzyme, mineral and fruit powder is hidden. The page tells a dramatic story about gum bacteria reaching the heart and brain, and calls its hydroxyapatite 'NASA-grade'. The research we found on hydroxyapatite covers toothpastes, and the xylitol review could not confirm caries prevention. The smallest available order is two bottles for $158, and the 90-day refund on the vendor page is 60 days on the order form. Real gum and tooth problems need a dentist.
What we liked
- Supplement Facts panel and distributor address are shown
- Free shipping on the order sizes we checked
- One-time purchase with no autoship
- Vendor page states a 90-day refund, longer than the order form
- Xylitol and hydroxyapatite are ingredients with at least some dental research
What we didn't
- Ten ingredients hidden in one 400 mg blend
- Research found covers toothpaste and gel, not this tablet
- Scare-style claims about gum bacteria and the heart and brain
- No order under $158 that we could verify
- Buyer pays return shipping on a refund
What is Synadentix?
Synadentix is a chewable tablet marketed as an oral microbiome aid for 'strong teeth and gums'. The label says to take one tablet once or up to twice a day, ideally after brushing, holding it in the mouth for 30 seconds before swallowing. The sales copy says it reactivates the body's ability to repair teeth during sleep by boosting saliva flow.
The Supplement Facts panel shows one 400 mg Proprietary Blend of guava fruit powder, microcrystalline hydroxyapatite complex, beta-glucanase, dextranase, amylase, lactoperoxidase, glucose oxidase, amyloglucosidase, lysozyme and lactoferrin. Xylitol, cellulose, magnesium stearate and natural flavoring are listed as other ingredients.
The label names Synadentix as the distributor with an Ohio address. We did not buy or use it. This review audits the offer: the text version of the sales page, the label image, the vendor's refund page, the Digistore24 order form data and the published research on the ingredients.
Format: Chewable tablet, 30 per bottle, 1 to 2 a day, dissolved in the mouth (one-time purchase, no autoship). Sold by: Synadentix (sold through Digistore24).
What is on the Synadentix label?
Each row compares what the label or sales page states with what published research used. When an amount is missing, there is nothing to compare, and we say so.
One proprietary blend of ten ingredients totals 400 mg, so no ingredient can be compared with a research dose, and the review-level evidence we found does not cover this tablet.
Do the Synadentix claims hold up?
"Reactivating your body's natural ability to repair teeth while you sleep"
No study of this tablet is shown. Enamel remineralization is a normal process, but the page gives no evidence that this blend boosts it.
"NASA-grade Microcrystalline Hydroxyapatite Complex"
A marketing label. The published research we found is on hydroxyapatite in toothpaste, and it is not a tablet trial.
"Gum disease bacteria reach your heart and brain"
Presented as settled fact to make gum care feel urgent. It is not established that a swallowed tablet changes these outcomes, and we found no trial showing so.
"Supported by multiple medical studies"
The page cites no study of this blend. The studies that do exist are on separate ingredients or on toothpastes and gels.
How much does Synadentix really cost?
| Option | Total | Per month | Shipping |
|---|---|---|---|
| 2 bottles | $158 | $79 | Free (verified on the order form) |
| 3 bottles (2 + 1) | $207 | $69 | Free |
| 6 bottles (3 + 3 free) plus 3 ebooks | $294 | $49 | Free |
The two-bottle order we verified on Digistore24 is $158 with free shipping, or $79 a bottle. The page's price graphics show 3 bottles at $69 each ($207) and 6 bottles at $49 each ($294) with three ebooks. At one tablet a day, that is $79, $69 and $49 a month. At the two-a-day maximum on the label, the monthly cost doubles.
There is no single-bottle entry that we could verify, so the cheapest way in is $158. That is a big amount for a product with no tested formula and hidden doses. The 6-bottle pack, at $294, is six months of the same untested blend.
The vendor says it is a one-time purchase with no autoship or hidden charges. Digistore24 processes the payment.
The Digistore24 order form we verified for two bottles showed $158 with $0 shipping. The vendor page says every 6-bottle order ships free and that international orders pay shipping fees. At the label's top serving of two tablets a day, each bottle lasts 15 days instead of 30.
Can you get a refund on Synadentix?
60-day window. The Digistore24 checkout data we verified gives a 60-day window. The vendor's own sales page and refund page promise 90 days counted from delivery. If the vendor honors 90 days that is better, but the order form is the contract, so we score on 60. The vendor's process requires emailing support, sending back all bottles and paying the return shipping yourself.
Step by step: find the Digistore24 order confirmation email, open Digistore24 support and look up the order at digistore24.com/support and ask for a refund in writing. Our Digistore24 refund guide covers returns, extra offers and auto-ship.
Which red flags did we find?
- Everything inside one proprietary blendTen ingredients share 400 mg with no individual amounts, and enzyme activity is not stated.
- Evidence is on different formsHydroxyapatite research is on toothpaste and lactoferrin research is on a multi-ingredient gel, not a chewable tablet.
- Alarm-style health storyThe page says gum bacteria travel to your heart and brain, and that ancestors kept their teeth healthy without dentists for 200,000 years. Both are used as sales hooks.
- Smallest order is two bottlesThe lowest priced option we could verify is $158, and the 3 and 6 bottle packs are pushed with stock and '96% of customers order 6' lines.
- Refund window differs by pageThe vendor page promises 90 days, while the Digistore24 order data we verified says 60.
Who should buy Synadentix, and who should skip it?
It may suit you if
- You already see a dentist regularly and want to try a chewable oral-care tablet as a side extra.
- You are comfortable spending $158 on a trial and will keep your order email to ask for a refund inside the window.
Skip it if
- You have bleeding gums, loose teeth, pain or swelling. See a dentist; a supplement will not diagnose or treat it.
- You want a label with an amount for each ingredient.
- You want a single-bottle trial for under $100.
How we assessed this
We did not buy or use Synadentix. This review audits the offer as it appeared on August 24, 2026. We read:
- The Synadentix text version of the sales page, FAQ and guarantee
- The Supplement Facts label image
- The vendor's refund page
- The Digistore24 order form data for product 639064
- Published research on hydroxyapatite, xylitol and lactoferrin
Sources
- Chatzidimitriou et al. 2025, hydroxyapatite toothpaste meta-analysis (PubMed)
- Ortiz-Saez et al. 2024, is xylitol effective in preventing caries, systematic review (PubMed)
- Lactoferrin, postbiotic and aloe gel vs chlorhexidine gel, split-mouth trial (PubMed)
- Synadentix refund policy (vendor)
- Digistore24 support
Scores: evidence 2.5, price 4.5, refund 7, transparency 3.5. How we score.
Want a second opinion?
Worthorpass reviews the same offer from the checkout side: the real price on the order form, billing terms and delivery. Read the Worthorpass offer review of Synadentix (2 Bottles) and compare it with our dose and price audit above.
Synadentix FAQ
Is Synadentix legit?
It is a real product with a printed label, a distributor address and a refund process. What is not shown is any trial of the tablet itself, and the ingredient amounts are hidden in a single blend.
How much does Synadentix cost?
Two bottles are $158 with free shipping, verified on the Digistore24 order form in August 2026. The page prices 3 bottles at $207 and 6 bottles at $294. At one tablet a day that is $79, $69 or $49 a month.
Does Synadentix have side effects?
The label advises people who are pregnant, nursing or have a medical condition to ask a physician first. It contains enzymes and a fruit powder, so anyone with allergies should read the full label.
How do I get a Synadentix refund?
The vendor's page says to email its support team with 'Refund Request' in the subject, send back all bottles with the packing slip and pay the return shipping. It states 90 days from delivery, but the order form data shows 60, so act inside 60 days.
Can Synadentix replace brushing or the dentist?
No. The label itself says to use it after brushing, and real dental problems need a dentist, not a tablet.
