Hypothesis
Long-term daily avocado-soybean unsaponifiables would limit cartilage and subchondral bone damage in a surgically induced rabbit model of knee osteoarthritis.
What failed
After 24 weeks of treatment, avocado-soybean unsaponifiables did not reduce hypertrophic cartilage response, surface fibrillation, trabecular bone loss or collagen remodelling markers compared with placebo, although osteoarthritis was successfully induced.
Broken assumption
Avocado-soybean unsaponifiables modify structural joint damage in osteoarthritis.
Why
The paper reports limited structural efficacy in this model under the conditions tested; it does not propose a mechanism for the lack of effect.
From the published paper: Sabucedo-Suárez et al. Frontiers in Veterinary Science, 2026. ↗CC BY