Don't count calories. It's a waste of time.
Don't look at nutrition labels on food packages. It's a waste of time.
Salt being bad for health is a myth. Just have the right kind of salt, which is raw sea salt or rock salt, and forget worrying about salt.
Saturated fat being bad for you is a myth. Have ghee. And butter. Eat ghee. Drink it. Cook in ghee. The entire "science" of cholesterol is complete nonsense.
Avoid white sugar. Take it as close to zero as possible. You can use gud or other traditional sugars. There are dozens of varieties in India.
Statins or blood thinners do no good. They only cause harm. Irrespective of what your doctor is telling you, throw your statins into the dustbin.
Have honey. And sugar cane juice. Even if you are diabetic.
If you have allergy problems, or auto immune disorders, or anything that refuses to go away, try dropping milk and wheat from your diet. There is a good chance that your problems will disappear.
Avoid foods which have preservatives and chemicals added in them.
Trace all foods to the source, as far as possible. Where grown, if fertilisers and pesticides used, when harvested, etc. for processed foods, what process, how processed, what additives, what preservatives. Once you attempt to do this , you will never eat any food that is processed. Or, even if you do, you will stop telling people not to smoke. Processed food is more unhealthy than smoking.
Biscuits are processed food. So are store bought attas/ flour. Cool drinks are not food. Pasteurised homogenised milk is processed food. Etc etc. the list is long. They are all poisons.
A long list of don'ts is difficult to remember. You can replace it with a short list of do's. Which is:
Buy only what grows.
Buy only cold pressed oils, non white sugars namely guds, raw unprocessed salt. And A2 milk.
Reduce grains in the diet to the extent possible.
Eat light at night.
Eat only while hungry.
Eat only while in a good frame of mind.
Practice mindfulness while eating.
Cook food yourself. And eat it fresh. Any cooked food that enters the fridge is not fresh.
Eat only half stomach.
Fast once in a while.
You want to still summarise it further, then it will help think of it as follows.
Consider your food as prasad, an offering to the Gods.
What precautions will you take if you are cooking for your God?
That's it. That one thought puts the whole thing in perspective, and the right actions follow.
A lot of progress in a lot of areas in life depends not on rushing forward, but on going back, peeling the layers, and simplifying.
Go back to the basics. Go back to your elemental nature. Reject all that is not pure.
It sounds simple, and it is. But it is far from easy.