Knotentang · Seealge · Braunalge
Ascophyllum nodosum (seaweed)
A brown alga said to act on the bacterial film on the teeth by way of the gut. For dogs there is one controlled 90-day trial; the manufacturer’s cat trials are unpublished, so we carry no reference amount for cats.
Why this grade: For dogs, one double-blind randomised placebo-controlled trial over 90 days with 60 dogs: less plaque and deposit than on placebo (Gawor et al. 2018). A second study by the same group measured compounds in saliva rather than the deposits, so it is not a replication. For cats there are only studies without randomisation or blinding.
„contributes to normal oral hygiene“
Reference amount per kg per day
- Dog50+ mgBasis: Gawor et al. 2018 (Front Vet Sci 5:168, PMC6080642), doppelblind, randomisiert und placebokontrolliert über 90 Tage mit 60 Hunden kleiner Rassen, im Mittel rund 4 kg: täglich ein Kaustück je kg Körpergewicht mit je 0,05 g Alge, also 50 mg/kg. Plaque und Zahnstein lagen danach niedriger als unter Placebo. Eine Koautorin arbeitet beim Hersteller. Eine Obergrenze ist nicht untersucht, die Zahl ist die geprüfte Menge und keine Empfehlung, mehr zu geben.
Worth knowing
The alga is naturally high in iodine. If your animal’s thyroid is under veterinary supervision, cats in particular, or if it is pregnant, ask your vet first.
Sources
Products containing Ascophyllum nodosum (seaweed)
Why there is no amount here
The randomised, placebo-controlled study behind the amount was carried out in dogs. For cats there are only studies that were neither randomised nor blinded, plus a manufacturer's figure. That does not carry a reference amount of its own, so cats stay unrated here.
Dose for a 20 kg Dog
- Bellfor Dental PulverBellfor260 mg/kgreaches reference
- Marsavet Dental ZahnpulverMarsavet105 mg/kgreaches reference
- 25 mg/kgbelow reference
- 15 mg/kgbelow reference
- bogadent PLAQUE-STOP HundbogadentThe manufacturer does not declare amounts