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diet × 74human-biology × 15
food × 13
metabolism × 8
zoology × 7
nutrition × 7
health × 6
biochemistry × 4
proteins × 4
evolution × 3
behaviour × 3
amino-acids × 3
fat-metabolism × 3
vitamins × 3
feline × 3
genetics × 2
botany × 2
neuroscience × 2
physiology × 2
microbiology × 2
bacteriology × 2
human-anatomy × 2
ecology × 2
ornithology × 2
human-evolution × 2
