The French lawyer and politician Jean Anthelme Brillat-Savarin said "Tell me what you eat, and I will tell you what you are." This quote is famous as it has been shortened to "You are what you eat."
One thing we can be almost certain of is that each and every day we are alive, we will eat. Whatever we decide to eat will either have a positive or negative effect on our health.
Abu Bakr (RA) said: "Without knowledge action is useless and knowledge without action is futile."
We are already acting (we are eating every day), what is important is that we become fully aware of the knowledge we are using when we take these actions and that we make as certain as possible that this is the kind of knowledge that will help us to achieve better health.
Prophet Muhammad (PBUH) said: "I seek God's protection from knowledge which is of no benefit."
May Allah (swt) grant you all the best of health.