This page lists every known solution for the clue “Protein Waste” in Crossword Challenge. Because this clue can appear in different puzzles (levels) with different required answers, we first list all the answers, then show which one appears in each puzzle below.
Protein Waste Crossword Challenge Answers (All Variants)
Urea
If more than one answer is listed, open your puzzle page below to confirm the one used there.
All Known Answers for Protein Waste Clue
Puzzle 1295 — - Puzzle 1674 —
- Puzzle 1770 —
- Puzzle 1868 —
Where This Clue Appears
Last Checked: May 04, 2026