so you eat yolk? most of the people will opt out the yolk but consume the white only

that was why i am quite confused, can we eat yolks

Those ppl probably regularly consume sugar and processed foods. On top of all that, of course any extra calories will be detrimental to them.
So they eat white only.

Eggs are very healthy, egg yolks have the best kind of fatty acid.
When I was deciding to become a vegan or vegetarian, being vegetarian was made so much easier cos how nutritional eggs are.

Nowadays a lot of health apps can track macro and micro nutrients.
I use Samsung Health, already come with the phone.