The answer is Olives.
One striking characteristic of the Mediterranean Diet is its heavy use of olive oil as the primary source of fat, and their minimal use of both Butter and Margarine. Another striking characteristic of the southern Italian Diet is its heavy reliance on whole grains.
The number of protons,neutrons,electrons, the way the are classified (earth metal, noble gas,meteoroids) and also the way they react.
The lack of access to the healthy food has caused the growth of Sebastian to slow down. In the case healthy food is provided to him, he can grow into the size he was genetically suited to. This process is known as the canalization. Canalization term is used as the measure of the ability of any given genotype to result in the same phenotype in-spite of the environmental variability.