Protocatechuic acid can be obtained from several foods:
Fruits: Protocatechuic acid is found in fruits such as strawberries, pomegranates, grapes, cherries, plums, apples, and persimmons.
Vegetables: Protocatechuic acid is also found in vegetables such as eggplant, spinach, Onions, sweet potatoes, carrots, and asparagus.
Tea: Protocatechuic acid is found in both green and black tea.
Nuts: Protocatechuic acid is also found in nuts such as walnuts, almonds, and hazelnuts.
Grains: Protocatechuic acid is also found in cereals such as black rice, black beans, and rye.
These foods are common in our daily diet, and through the consumption of these foods can be ingested a moderate amount of protocatechuic acid, to obtain its health effects on the human body.