HierarchyPrevent → reuse → recover
A generic waste hierarchy for food is: prevent loss, reuse suitable grades, recycle/valorize by-products, recover energy or nutrients where lawful, and dispose of the remainder. In practice the hierarchy is constrained by food safety, residues, spoilage horizon, transport, and whether a buyer exists for the secondary grade.
Stream disciplinePeel is food or feed only by design
If peel or press cake is intended as food, feed, or color ingredient, it must be identified at separation, handled as an edible stream, kept traceable, chilled where required, and protected from cross-contamination — not swept from the floor after packing. Animal feed, compost, and land application each carry separate legal conditions.
Betalain and bioactives — cautious readingPigment is not a health claim
Laboratory work on bioactive compounds, betaine/betalain notes, and peel functional-compound profiles (resources 201–207) remains experimental context: source, extraction, stability, and health-effect evidence are preliminary and often laboratory-bound. Pigment strength and stability vary by cultivar, maturity, extraction, pH, heat, light, and storage — do not extend a single study into a product or marketing claim.