Turians evolved on Palaven, a Milky Way world with a weak magnetic field that leaves it vulnerable to solar radiation. Most life on Palaven has a protective, metal-rich exoskeleton as a natural defense. The thick, plate-like skin of a turian protects her against some long-term radiation, but does not defend against projectiles or energy weapons.
Unlike most sapient species in the Milky Way, turians are a dextro-protein species, meaning that food for levo-protein species like asari or humans can cause dangerous allergic reactions and vice versa. The only other known sapient dextro species is the quarians. As well as Palaven flora, turian scientists with the Andromeda Initiative paid the quarian Migrant Fleet handsomely for plants and fungi that were specially developed to thrive in hydroponic conditions.