Since "Amygdalina" can refer to a few specific things—most commonly the cyanogenic glycoside (often associated with Laetrile or Vitamin B17), or taxonomically to species like Vernonia amygdalina (Bitter Leaf)—I have structured this as a comprehensive post covering the most prominent definition: the controversial compound Amygdalin.

Several studies have investigated the potential health benefits and risks of amygdalin. A 2015 review of 15 studies on amygdalin found that:

Beyond the almond, amygdalina has been applied to several unrelated species, primarily in botanical history, to denote almond-like features:

is a taxonomic epithet most famously associated with the bitter almond, a species of tree native to the Middle East and South Asia. The term is derived from the Greek amygdalē (ἀμυγδάλη), meaning "almond." In biological nomenclature, the feminine form amygdalina is used as a specific or subspecific epithet to indicate a relationship to the almond, typically characterized by bitterness, specific leaf shapes, or chemical composition (e.g., amygdalin).