Explore the Studies
At HappyDogCo we believe every product should be backed by real evidence.
That’s why our VitaChews range is formulated using ingredients studied in dogs for their proven benefits for gut health, joint comfort, skin inflammation and mental wellbeing.
Below you’ll find published studies and veterinary research supporting the key nutrients in VitaChews from probiotics and omega-3s to MSM, turmeric and L-theanine.
1. Probiotics & Gut Health
Supplementation with Bacillus coagulans and other probiotic strains has been shown to improve intestinal microbiota composition and reduce inflammation in dogs within 2–4 weeks.
→ Gut Probiotics and Health of Dogs and Cats: Benefits, Applications and Evaluation Criteria – Frontiers in Microbiology, 2023
2. Prebiotics for Digestive Balance
Prebiotic fibres such as inulin and fructo-oligosaccharides stimulate beneficial bacteria and improve stool quality in healthy dogs.
→ Function of Probiotics and Prebiotics on Canine Intestinal Health – Animals (MDPI), 2024
3. Synbiotic Modulation in 4 Weeks
A 2021 study demonstrated that a synbiotic supplement altered gut microbial diversity and short-chain fatty-acid profiles in dogs after 4 weeks.
→ Animal Microbiome, 2021
4. Joint Support – Glucosamine & Chondroitin
Randomised, placebo-controlled trial in dogs with hip osteoarthritis found improvements in pain and mobility scores after 60 days of glucosamine/chondroitin supplementation.
→ Veterinary Sciences, 2023
5. Omega-3 EPA / DHA for Skin & Joints
Omega-3 fatty acids from fish oil help reduce inflammatory cytokines and improve coat gloss and mobility in dogs.
→ How Joint Supplements Can Help Orthopaedic Conditions – Cornell University College of Veterinary Medicine, 2022
6. Green-Lipped Mussel (GLM) Extract
Clinical studies show GLM provides natural omega-3s, antioxidants, and glycosaminoglycans that help alleviate arthritic stiffness in dogs.
→ Journal of Veterinary Science, 2018 – reviewed in MDPI summary
7. Antioxidants & Skin Barrier Function
Vitamin E, Zinc, and Collagen peptides contribute to dermal repair and reduced itching in dogs with sensitive skin.
→ Veterinary Dermatology, 2018
8. L-Theanine & Behavioural Calm
L-Theanine supplementation promotes relaxation and reduces anxious behaviours in dogs without sedation, typically within 2 weeks.
→ Journal of Veterinary Behavior, 2016
9. MSM & Turmeric Synergy
Methylsulfonylmethane (MSM) and curcumin together support cartilage health and reduce oxidative stress in canine models.
→ American Journal of Veterinary Research, 2007
10. Comprehensive Review of Nutraceuticals in Dogs
Systematic review summarising the efficacy of joint, gut, and cognitive nutraceuticals in canine health.
→ Animals (MDPI), 2021
Each study helps confirm what we’ve seen first hand: when you nourish your dog from the inside out the results speak for themselves.
11. Passion Flower + Valerian + Tryptophan in Canine AnxietyRandomised, placebo-controlled clinical study in 44 dogs assessing a supplement containing Passiflora incarnata (Passion Flower), Valeriana officinalis (Valerian), and L-Tryptophan. After 6 weeks, supplemented dogs showed significantly reduced anxiety and cortisol levels during noise and fear-inducing events.
→ Animals (MDPI), 2024 — Read study
12. A double-blind, placebo-controlled trial in dogs with osteoarthritis significantly reduced pain and improved willingness to move after 60 days.
📚 Martello et al., 2022 - Read the study
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