Vegan diets are regarded as appropriate for all stages of the life-cycle by the American Academy of Nutrition and Dietetics, the Australian National Health and Medical Research Council, and Dietitians of Canada.
Protists - members of an informal grouping of diverse eukaryotic organisms that are not animals, plants or fungi, and are grouped together for convenience, like algae or invertebrates. Besides their relatively simple levels of organization, protists do not necessarily have much in common.
Subdivisions of Protists
Protozoa the unicellular "animal-like" - Flagellata, Ciliophora, Amoeba, Sporozoans.
Protophyta the "plant-like" - mostly unicellular algae.
Molds the "fungus-like" - slime molds and water molds.