Last updated: May 6, 2026
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What the VOHC Seal Actually Means
VOHC-approved dental products carry a seal granted by the Veterinary Oral Health Council, an independent body that reviews evidence submitted by manufacturers and grants acceptance to products that demonstrate, in controlled studies, a measurable reduction in plaque or tartar (calculus) on dogs’ or cats’ teeth. The seal is not a marketing logo manufacturers can purchase — it has to be earned through testing meeting VOHC’s protocol.
The seal is also not the same thing as FDA approval. The FDA does not approve dental products in the way it approves drugs. VOHC fills a niche by setting an evidence standard the broader pet products industry otherwise lacks. The seal is the closest thing pet owners have to a reliable filter when shopping for dental adjuncts.
This guide explains what the testing requires, which product categories can earn the seal, how to use the list, and what the seal does and does not promise about a product’s effect on your specific pet.
How the Testing Works
VOHC requires controlled studies — typically 28 days minimum — comparing the test product against a control (often plain water or a placebo product, depending on category). The studies measure plaque accumulation, tartar accumulation, or both, using standardized scoring systems that reduce subjectivity. Pets are scored before and after the intervention, and the difference between treated and control groups is calculated.
For acceptance, the product must show a clinically meaningful reduction — generally on the order of 10 to 20 percent or more depending on the category and submission. The studies must follow VOHC’s published protocol, including blinded scoring and adequate sample sizes. Multiple independent studies are sometimes required.
The product is then granted one of two seals: “Helps Control Plaque” or “Helps Control Tartar,” depending on what the testing demonstrated. Some products earn both. The wording is intentionally precise — VOHC does not claim products cure or prevent dental disease, only that they reduce plaque or tartar.
Categories That Can Earn the Seal
The VOHC list spans several product categories. Dental treats and chews form one large category — products designed to reduce plaque and tartar through mechanical action during chewing. Examples that have appeared on the list include certain Greenies products, OraVet chews, and various brand-specific dental chews for both dogs and cats. Our breakdown of best dental chews for dogs covers how to choose well within this category.
Dental diets — prescription kibbles formulated with specific size, shape, and texture to fracture along defined lines and mechanically clean teeth — are another category. Hill’s t/d and Royal Canin Dental have been on the VOHC list. These are not the same as standard kibble, which has minimal dental effect.
Water additives, oral gels, dental wipes, and toothpastes can also qualify when their evidence supports it. Healthymouth water additive has been on the list. Various enzymatic toothpastes have qualified. The seal in these categories is an indicator the product was tested and found to work — but the absolute magnitude of effect varies, and brushing remains more effective than wipes or additives.
How to Use the List When Shopping
The most reliable way to use VOHC is to visit their website, find the current accepted-products list, and shop from it. The list is updated as new products are accepted and old ones are removed (often because of reformulation or expiration of approval). Products without the seal may still be effective, but you have less assurance.
When choosing within the list, match the product category to your pet’s situation. Dogs who already brush daily may not need both a water additive and a chew — pick one adjunct that fits your dog’s preferences. Cats who refuse brushing benefit from layering several adjuncts. Pets with established disease should be on a plan tailored by their veterinarian, not just consumer products.
Read the label for the specific seal — “Helps Control Plaque” versus “Helps Control Tartar” — and know that plaque reduction generally translates to better gingival health, while tartar reduction is more cosmetic unless paired with plaque reduction.
Where the Seal Falls Short
The seal does not promise the product will work for every pet. Individual variation in saliva chemistry, chewing behavior, oral microbiome, and existing disease all affect outcomes. A study showing 20 percent average reduction across a group does not predict your specific pet’s response.
It also does not promise the product is the best in its category — only that it meets VOHC’s threshold. Some excellent products may not have submitted for testing, and some weaker products do qualify because they barely cross the bar. Use the seal as a filter for what has been tested, not as a ranking.
The seal does not replace a veterinary exam. A pet with established gingivitis or periodontal disease needs a professional cleaning — see periodontal disease stages in dogs. VOHC products help maintain a clean mouth or slow new plaque, but they do not heal existing disease.
What the Seal Means in Context
The single most effective home intervention remains daily brushing. Building a sustainable daily dog tooth brushing routine outperforms any individual VOHC-accepted product for plaque control. The role of seal-bearing products is as adjuncts that compensate for what brushing can’t reach or that fill in for skipped days.
For pets who absolutely refuse brushing — particularly cats — the role of VOHC products grows larger. A combination of dental wipes, water additives, and dental treats can layer modest individual effects into a meaningful overall benefit. See dental wipes vs brushing for the trade-offs in that category.
For pets with significant dental tartar already in place, VOHC products will not remove it. Only professional scaling under anesthesia can do that — see dental X-rays for dogs for what a thorough cleaning visit includes.
Common Misconceptions About VOHC
VOHC is sometimes described as if it were a regulatory body. It is not. It is a voluntary review council, and manufacturers choose whether to submit products. Some excellent products are not submitted because the testing is expensive or because the manufacturer doesn’t see the marketing benefit. Lack of seal does not mean the product doesn’t work — but presence of seal is more reliable than absence.
The seal is also category-specific. A water additive with the seal has been tested in water additive protocols; a chew with the seal has been tested in chew protocols. Don’t assume the strength of effect is the same across categories. Treats and dental diets generally show larger plaque reduction than additives, because mechanical chewing is more effective than passive contact.
Finally, the seal is not lifelong. Products can be removed when they are reformulated without retesting, when their approval expires, or when manufacturing changes. Always check the current list rather than trusting an old reference.
Putting Together a Realistic Plan
For most dogs: daily brushing, a VOHC-accepted dental chew a few times a week, and a professional cleaning every twelve to eighteen months. Add a water additive only if it doesn’t reduce drinking. Skip the dental diet unless your veterinarian recommends it for a specific reason such as significant ongoing tartar accumulation despite good home care.
For most cats: aim for brushing or finger-rubbing with toothpaste daily, a VOHC-accepted dental treat, and dental wipes a few times a week. Add a water additive cautiously and monitor water intake. Plan a professional cleaning every twelve to twenty-four months. Cats with stomatitis or significant resorption may need more frequent attention.
For both: build the habit, watch for early signs of disease (red gum line, bad breath, dropped food), and don’t rely solely on consumer products. The mouth needs professional attention even when home care is excellent.
How Different Categories Compare
Among VOHC-accepted categories, dental chews and prescription dental diets generally show larger absolute plaque and tartar reductions than water additives or wipes. The reason is mechanical: chewing exerts more physical force on tooth surfaces than passive contact with treated water or a quick wipe. The trade-off is calories — dental chews and dental diets contribute more to daily caloric intake than passive products.
For dogs at a healthy weight with no caloric concerns, a dental chew most days plus daily brushing is a strong combination. For overweight dogs or those on calorie-restricted diets, a water additive may be the better adjunct because it doesn’t add calories. Pet-by-pet judgment matters here; your veterinarian can help align the dental plan with overall nutritional goals.
Toothpastes themselves are not always VOHC-accepted, because the seal applies to formulations tested for plaque or tartar reduction in standardized protocols. Many enzymatic pet toothpastes work well in practice — combined with the mechanical action of brushing — even without the seal. Look for the seal where it exists; absence of seal on a toothpaste is less of a red flag than on a chew or additive.
Frequently Asked Questions
Is the VOHC seal the same as FDA approval?
No. The FDA does not approve dental products. VOHC is an independent council that grants seals to products that meet its evidence standard for plaque or tartar reduction. The seal is more relevant for dental products than FDA status.
How often is the VOHC list updated?
It changes regularly as new products are accepted and old ones are removed. Always check the current list at the time of purchase rather than relying on an older reference.
Are VOHC products better than non-VOHC products?
The seal indicates that the product has been tested and shown to reduce plaque or tartar. It does not mean the product is the best in its category, but it is more reliable than untested products.
Can VOHC products replace brushing?
Generally no. Mechanical brushing is more effective than any individual adjunct. VOHC products are best used to complement brushing, not replace it. They become more valuable when brushing isn’t possible.
Are VOHC products safe?
Products that earn the seal are generally safe at label use. As with any product, watch for individual reactions and consult your veterinarian if your pet has specific health conditions or allergies.
Why isn’t every dental product VOHC-approved?
Submission and testing are expensive, and the seal is voluntary. Some manufacturers don’t submit. Some products don’t meet the evidence threshold. Lack of seal isn’t proof of ineffectiveness, but presence of the seal is the most reliable signal.
