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diet × 67human-biology × 14
food × 12
metabolism × 8
nutrition × 6
health × 6
zoology × 5
biochemistry × 4
evolution × 3
behaviour × 3
fat-metabolism × 3
vitamins × 3
feline × 3
genetics × 2
botany × 2
neuroscience × 2
physiology × 2
microbiology × 2
proteins × 2
bacteriology × 2
human-anatomy × 2
ornithology × 2
medicine × 2
human-evolution × 2
digestive-system × 2
