You are what you eat. Of course you are what you are able to digest and absorb from the food you eat. You are basically powering your body engine to run with the fuel in the form of food daily.
Is it possible to run a petrol car with adulterated petrol or kerosene in it. How long will it run and how efficiently it runs. Yes it runs for a while but eventually it gets in to trouble. Sometimes we could repair it with a lot of rework and cost involved but some times it leads to irreparable damage.
Can you fly an aero plane with the normal diesel used in our land based commercial vehicles. No, aviation uses a special modified format of petrol which is called jet fuel. It has additives to prevent friction, risk of icing, resisting high temperatures etc. If you use a normal diesel , no body tried but I am sure it would run into trouble even before takeoff.
Similarly our body needs quality healthy food that it is supposed to have. Yes we do have a lot of modified food these days called fast foods, processed foods and junk foods. And yes we are capable to accept all this food and our systems are good enough to take in all this unhealthy stuff. But if you believe that this would not have any negative effect on your energy levels, you mental alertness, your mood and complete state of being, then you are naïve enough to believe that you can run a petrol vehicle using kerosene or an aero plane with commercial diesel.
*Do read the Disclaimer