Heart Supplement Products, Reviewed

BOTTOM LINE

The brand's quality control (NASC) deserves credit — but no ingredient carries HCM-grade evidence, and most amounts fall short of studied doses.

Coming from Thorne's pet line (now PetDomain), the brand-trust question earns a generous answer. The other question — "does this blend help feline hearts?" — finds none of the 11 ingredients carrying HCM-grade evidence. The amounts sharpen the picture: per 1g scoop, taurine 140mg is a meaningful feline dose, but carnitine 140mg (dog DCM studies used grams) and CoQ10 20mg (human studies use 100–300mg) are symbolic, and magnesium 500mcg / potassium 100mcg are decorative. The herbs — hawthorn, arjuna — are extrapolations from human tradition and small trials. See the taurine, carnitine and ubiquinol cards for each ingredient's full story.

FACTS

Research

No feline clinical evidence for the product — and no ingredient carries direct HCM evidence either

Track record

ThorneVet lineage (now PetDomain) · human Thorne is a top-tier supplement brand

Caution

A multi-herb blend — check interactions with your vet if your cat takes cardiac drugs (clopidogrel etc.)

TYPES & INGREDIENTS

• Taurine 140mgA meaningful feline dose — but HCM is not a deficiency disease (see taurine card)
• L-carnitine 140mgDog DCM studies used grams — symbolic amount (see carnitine card)
• CoQ10 20mgSmall vs 100–300mg in human studies (see ubiquinol card)
• Hawthorn extract 70mgExtrapolated from small human heart-failure studies — no feline data
• Arjuna · eleuthero · quercetinTraditional-medicine and in-vitro level — no feline data
• Vitamin E · iron · Mg · KTrace additions — 500mcg Mg and 100mcg K are nutritionally negligible