The answer is yes! This is good news because it means we are not simply a result of our genes! I've always compared genes to a high-performance sports cars like a Ferrari. Just because you own one doesn't necessarily mean you're going to be racing down the road at 200 km/h. You need to press on the accelerator first! Put in extremely simple terms, genes are similar: they can be switched on and off so if you don't push the "pedal" they won't be activated. This is what is known as Epigenetics.
Some dietary compounds are known to control these ‘switches’, affecting many health conditions such as cardiovascular and autoimmune diseases, reproductive and neurological disorders and even cancer.
For example, curcumin (found in turmeric), epigallocatechin gallate