Hello, we are currently in first science. And we must carry out a TPE. We have chosen a subject on the nails. “What factors influence the growth of nails?”

Could you indicate us sites with statistical data (table, curve, graph …) to confirm our hypotheses (temperature, diet, age …)

Thank you

it is the food which is determining

for a good growth it is necessary

ZINC

of B5 or
panthotenic acid
of BIOTIN

of CYSTEINE

Thank you very much but the problem is that we have to prove this hypothesis by an experiment … Since it is impossible to carry out experiments on the nails, do you know where we could find statistical data on the relationship between food and nails?