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0answers
19 views

Hormones and body mass

I was wondering how some animals (bulls, elephants etc.) become so large by only eating grass or plant based material and why some humans can build large amounts of muscle and mass without a proper ...
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2answers
182 views

Histidine - why essential for children?

Why is histidine an essential amino acid for children but not for adults ? What changes in the body occur which lead to the formation of histidine in adults but not in children ? What causes these ...