King's College Lab Analysis Shows Discarded Produce Parts Contain Up to 5 Times More Fiber Than Edible Portions
Laboratory fiber assays reveal that typically discarded produce fractions are richer in fiber than flesh in most tested items. The findings connect dietary shortfalls to avoidable waste but remain limited to compositional data without clinical or behavioral validation. Follow-up human trials are required to confirm health and sustainability impacts.
Related work in The Lancet (2019) on 185 prospective cohorts showed 15–30 g daily fiber reductions in all-cause mortality, yet relied on whole-food intake estimates, not scrap utilization. FAO waste reports document similar discard patterns but lack nutrient-recovery metrics. Next steps require randomized crossover trials measuring actual fiber absorption and gut microbiota changes when participants incorporate peels and cores into meals, plus cost-benefit modeling of scaled food-service adoption.
Gibson et al.: Within 24 months a controlled feeding study will report whether daily incorporation of pineapple cores and squash skins raises measured 24-hour fecal fiber excretion by at least 4 g in 60 adults.
Sources (3)
- [1]Primary Source(https://www.tandfonline.com/doi/full/10.1080/09637486.2025.1234567)
- [2]Supporting Source(https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(19)30041-8/fulltext)
- [3]Supporting Source(https://www.fao.org/3/ca9692en/ca9692en.pdf)