Guide to Comparing Supplement Brands

DigestiveComparisonsMeongsiljang Veterinary Advisory Board

We’ve compared and summarized the key factors to check when choosing a pet supplement brand, including ingredients, certifications, price, and country of origin.

What Are Pet Supplement Brands?

Pet supplement brands offer product lines formulated with varying ingredients, concentrations, and forms to replenish nutrients that dogs and cats often lack. When choosing a brand, what truly matters isn’t the marketing copy, but the ingredient levels, international certifications, and country of origin. The key criterion should be how much of the proven, effective ingredients are included, not the price.

4 Criteria to Check When Choosing a Supplement Brand

The key factors to check remain the same regardless of brand. To avoid confusion, first establish these four criteria before comparing products: - Ingredient Content: How the actual amount compares to the recommended daily intake - International Certifications: Whether the product meets AAFCO (Association of American Feed Control Officials) standards and holds NASC (National Animal Supplement Council) certification - Origin and Manufacturing Facility: The origin of raw materials and whether the manufacturing facility is GMP-certified - Clinical Evidence: Whether the ingredients are supported by veterinary textbooks and scientific literature

Comparison of Major Brand Types

Item	Veterinarian-prescribed brands	Global general brands	Domestic small/mid-size brands
Main distribution channel	Animal hospitals	Pet shops, online	Online, home shopping
Clinical research evidence	Strong	Moderate	Weak
International certification (NASC, etc.)	True	True	False
Daily recommended dose adequacy	High	Moderate	Wide variation by brand
Price range (1 month)	30K–60K KRW	20K–40K KRW	10K–30K KRW
Veterinary consultation needed	Recommended	Optional	Optional

General trends among brands distributed domestically as of April 2026 — individual products require separate verification

Do Not Feed Human Supplements As-Is

Human multivitamins may contain ingredients that are toxic to dogs and cats. Cats are especially sensitive to toxins compared to dogs; some substances can cause adverse effects at half the dose that would be problematic for dogs, and kittens may show symptoms even at low doses. Therefore, you should never apply human dosage guidelines to pets. Additionally, pets with liver disease, kidney disease, or pancreatitis are more vulnerable to toxicity. Always choose products specifically formulated for pets, and consult your veterinarian before use if your pet has any underlying health conditions.

Selection Criteria Vary by Purpose

Not every brand is right for every purpose. Start by identifying your pet’s specific needs. - Joints: Choose brands that clearly list glucosamine, chondroitin, and MSM content. - Gut health: Choose brands that specify the probiotic CFU count and strains. - Skin and coat: Choose brands that clearly state the omega-3 (EPA and DHA) content. - Kidneys: Opt for low-phosphorus, omega-3-focused formulas, preferably those recommended by a veterinarian.

Key Ingredients to Check on Brand Labels

Safe

글루코사민

관절 연골 재생 촉진

Dosage: 체중에 따라 다름

수의외과 교과서 권장

Safe

콘드로이틴

연골 구성 물질 보강

Dosage: 체중에 따라 다름

글루코사민과 병용 시 효과 상승

Safe

오메가-3(EPA·DHA)

항염증·피부 모질 개선

Dosage: 체중에 따라 다름

수의내과학 교과서 근거

Safe

프로바이오틱스

장내 균총 개선

Dosage: 제품별 CFU 상이

균주·CFU 표기 확인 필수

High risk

자일리톨

(사람용 영양제 감미료)

Dosage: -

개에게 저혈당·간부전 유발

Compare by Price Per Ingredient, Not Just Price

Even if two products contain the same 500 mg of glucosamine, Brand A might deliver that amount in one capsule while Brand B splits it across two. In such cases, you should calculate the unit price based on the total monthly ingredient content to make a fair comparison. Additionally, two single-ingredient products with clear, specific purposes often cost less in total than one all-in-one supplement. Always check both the recommended serving size and the number of servings per month listed on the label.

Brands to Avoid

Avoid products that list a high total ingredient amount but obscure individual amounts under a “proprietary blend.” Also be wary of products that merely advertise “veterinarian recommended” without providing supporting research or certification, as well as those missing country-of-origin or manufacturing facility information. If a product displays a certification logo but lacks an actual certification number, it’s worth questioning its legitimacy.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Are overseas direct-purchase brands always better than domestic ones?

Not necessarily. Some international brands sell products without certification, while some domestic brands have earned NASC and GMP certifications. Rather than focusing on where a brand is from, base your decision on its certifications and how clearly it lists ingredient amounts.

Can I feed my pet multiple brands at the same time?

If supplements share the same ingredients (such as omega-3 fatty acids), there’s a risk of overconsumption. Always consult your veterinarian before combining products, and compare ingredient labels to ensure you’re pairing items without overlapping components.

Do expensive premium brands always work better?

Price doesn’t guarantee ingredient quality. When the ingredients and their concentrations are the same, what makes a difference is whether the product is certified and where the raw materials come from. However, a significant portion of the price difference often comes down to branding and packaging costs.

Can I give my cat and dog the same brand of product?

Even if the brand is the same, the product line must differ. Cats have different nutritional and metabolic characteristics from dogs (for example, they cannot effectively synthesize vitamin D in their bodies and must obtain it through their diet), so you should never feed them dog food as is. Additionally, cats may be more sensitive to the toxicity of certain ingredients than dogs, even if the ingredients are the same. Therefore, always choose a product line specifically formulated for your pet's species.

How should I go about switching my pet’s supplement brand?

Sudden changes can cause digestive upset. To transition smoothly, gradually mix the new product with the old one over several days. If vomiting or diarrhea persists, stop immediately and consult your veterinarian.