170 Celosia Leaf Phytate Negatively charged phosphate group in phytic acid is known to inhibit the action of gastrointestinal tyrosinase, trypsin, pepsin, lipase, amylase and essential minerals. false false The highest phytate content (8.57± 0.06%) is within the safe limit, since the inhibition of mineral absorption by phytate only occurs at levels greater than 10% in a diet. 8,607