Flavonoids are secondary plant metabolites consisting of a polyphenolic structure. They can be found in many vegetables, fruits and beverages and are, due to their biological activity, often used in nutraceuticals, pharmaceuticals and medicinal products (Panche et al., 2016).

Flavonoids exhibit antioxidant, anti-inflammatory, antimutagenic and anticarcinogenic properties and are also able to modulate the function of cellular key enzymes. The plant uses flavonoids primarily for its growth and as a defense against (a-)biotic stressors (Panche et al., 2016).