amino acids are those that the
organism is not able to synthesize and
that need to be ingested by the
individual. amino acids are
those that are produced by the
organism.

There are living species that produce
every amino acid they need, for
example, the bacteria Escherichia coli,
that does not have amino
acids. Other species, like humans, need
to obtain essential amino acids from the
diet. Among the different known
amino acids that form humans
can make twelve of them and the
remaining eight need to be taken from
the proteins they with food.

The essential amino acids for humans
are phenylalanine, [?], isoleucine,
lysine, methionine, threonine,
tryptophane and [?].