Glycogen.
Glycogen is a multibranched polysaccharide that serves as a form of
energy storage in animals. They're stored inside the liver and muscles.
Consume a low carbohydrate diet and high protein, avoid fasting
Very small things on the order of micrometers/smaller that cannot be resolved with a light microscope. Things like viruses, non mitotic DNA, certain bacteria/cells can only be resolved via an electron microscope.