Are Pet Supplements Placebo? Exploring the Regulations and Quality Standards
Pet owners often seek to enhance their pets’ well-being through various means, including the addition of supplements to their diet.
While the market for pet supplements is vast and diverse, questions persist about their efficacy and necessity. Scientific research offers valuable insights into the effectiveness of these supplements, revealing their potential benefits and limitations.
By examining empirical evidence and expert opinions, we can better understand how these supplements may impact our pets' health and quality of life.
Understanding Differences in Regulation Compared to Human Health Products
The widespread use of pet supplements in the United States reflects a growing trend toward enhancing the health and well-being of companion animals.
However, unlike human dietary supplements, pet supplements do not fall under the regulatory oversight of the Dietary Supplement Health and Education Act (DSHEA) of 1994. This lack of regulatory framework means that pet supplements may undergo less scrutiny for safety and efficacy compared to their human counterparts. Consequently, while human dietary supplements are subject to FDA regulation through the Center for Food Safety and Applied Nutrition (CFSAN), pet supplements fall under the purview of the Center for Veterinary Medicine (CVM).
Without a clear regulatory definition for pet nutraceuticals, the oversight of these products remains ambiguous, potentially leaving room for inconsistencies in quality and safety standards. Given the complex regulatory landscape surrounding pet supplements, pet owners should exercise caution and consult with veterinarians before incorporating such products into their pets’ diets.
Understanding the regulatory context of pet supplements is crucial for ensuring the safety and efficacy of these products, as well as for promoting the overall health and well-being of our beloved animal companions.
Do they really work?
Claims of effectiveness surrounding many pet supplements and nutraceuticals often rely on subjective assessments such as owner testimonials, lacking rigorous validation through well-designed clinical trials published in peer-reviewed journals.
While human and rodent studies may offer insights, they fail to fully account for the distinct pharmacokinetics and pharmacodynamics across different animal species. Furthermore, the oral consumption of pet supplements introduces variability in drug bioavailability, further complicating extrapolations from human or animal studies. Marketing claims grounded solely on in vitro research should also be met with skepticism, particularly in cases like joint supplements where efficacy is often inferred from high-dose applications on isolated cartilage or cultured cells.
In human medicine, systematic reviews provide practitioners with a synthesized view of quality scientific evidence for drug interventions, a practice yet to be widely adopted in veterinary medicine and virtually absent for pet supplements.
Notably, a comprehensive systematic review conducted in 2012 evaluated the efficacy of nutraceuticals for osteoarthritis across multiple animal species, revealing low strength of evidence overall except for omega-3 fatty acids in dogs.
Quality issues
ConsumerLab.com evaluates various ingredients for animals, including joint supplements, omega-3 and omega-6 fatty acids, and multivitamins.
Within the joint supplement category for dogs and cats, only two out of four products evaluated were approved for quality by ConsumerLab.com, with four additional products receiving approval through their voluntary Quality Certification Program. Similarly, within the omega fatty acid supplement category, only one out of two supplements evaluated was approved, highlighting variations in product quality. Notably, equine supplements have not been assessed by ConsumerLab.com, indicating a gap in evaluation for this specific category.
While the FDA’s Center for Veterinary Medicine (CVM) can regulate pet supplements in response to adverse events, there’s currently no mechanism ensuring manufacturers’ accountability for accurate labeling of novel ingredients.
Manufacturers should be questioned regarding the accuracy of their labels and adherence to Good Manufacturing Practices (GMPs) to ensure product quality and safety.
Cancer patients might have overuse of supplements
A survey was conducted to explore the dietary habits and supplement usage among dogs diagnosed with cancer compared to a group of healthy dogs, with a focus on the sources of information consulted by their owners.
Respondents primarily hailed from English-speaking nations, providing a diverse pool of data for analysis. Dogs classified as healthy (N = 213) were identified based on owner reports indicating good health, while those in the cancer group (N = 132) were reported to have been diagnosed with cancer. The survey, distributed online, targeted clients attending a tertiary oncology service, visitors to a local primary care veterinary practice, and individuals engaged through social media platforms.
Owners of dogs with cancer demonstrated a greater propensity for researching pet health, nutrition, and nutritional supplements compared to owners of healthy dogs, as evidenced by significant differences in time allocation. While veterinarians were commonly cited as a primary information source for both groups, owners of healthy dogs were more inclined to consult pet stores, whereas those with dogs diagnosed with cancer were more likely to turn to social media groups and blogs.
Dietary patterns also varied between the two groups, with healthy dogs predominantly fed commercial dry food, while homemade cooked and raw diets were more prevalent among dogs with cancer, alongside a higher incidence of supplement usage, particularly cannabidiol products, mushroom extracts, or turmeric/curcumin.
In summary, the popularity of pet supplements highlights a desire to improve pet health, but regulatory disparities raise concerns about safety and efficacy. Limited scientific evidence and quality issues further complicate matters. Consultation with veterinarians and promoting transparency are crucial for informed decision-making and safeguarding pet well-being.
Resources
Bianco AV, Abood S, Mutsaers A, Woods JP, Coe JB, Verbrugghe A. Unconventional diets and nutritional supplements are more common in dogs with cancer compared to healthy dogs: An online global survey of 345 dog owners. Vet Comp Oncol. 2020 Dec;18(4):706–717. doi: 10.1111/vco.12599. Epub 2020 May 31. PMID: 32304175.
Finno CJ. Veterinary Pet Supplements and Nutraceuticals. Nutr Today. 2020 Mar-Apr;55(2):97–101. doi: 10.1097/nt.0000000000000399. PMID: 33446942; PMCID: PMC7802882.