This page lists every known solution for the clue “___ Acid (Protein Builder)” 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.
___ Acid (Protein Builder) Crossword Challenge Answers (All Variants)
Amino
If more than one answer is listed, open your puzzle page below to confirm the one used there.
All Known Answers for ___ Acid (Protein Builder) Clue
Where This Clue Appears
Last Checked: December 28, 2025