Breeding of crops with higher levels of vitamins and minerals or higher proteins and healthier fats is called biofortification. This is the most practical aspect to improve the health of the people.
Wheat variety with high protein content atlas66 has been used as a donor for improving cultivated wheat.
The cell from microorganisms such as bacteria, yeast filamentous algae, are treated in various ways and used as food, are called single cell protein e.g. Spirulina blue green algae and Mushroom -fungi