This overstates the case a bit, since while 50% of IQ is determined by genetics, the rest is determined by healthy eating habits from a young age to all throughout your life. That can also boost your IQ, up to a point. It should also be made clear there's no racial connection to this; it's just family connection. So if you have a genius in your family, even say a cousin, then its a good hint that you too can excel and raise your IQ.