IQ is 40-80% genetically influenced
It's already proven that the environment affects IQ, but heredity affects a person's overall intelligence level much more strongly. The environment can add or subtract a few points, but it doesn't compare to what you get from your parents. Children who ate unhealthy foods before the age of three have lower IQs than their peers. The difference is especially noticeable by age eight. Conversely, a diet rich in vitamins and minerals adds to children's intelligence. Breastfeeding increases a child's IQ by three to eight points. To check your IQ level and that of your loved ones, I suggest you take the test
iq-global-test.com.
