What is Importance of Lemon in Hinduism Explained - Artha Youtubebr br Lemons are a rich source of vitamin C, providing 64 of the Daily Value in a 100 g serving. Other essential nutrients, however, have insignificant content.br br Lemons contain numerous phytochemicals, including polyphenols, terpenes, and tannins.br br Lemon juice contains slightly more citric acid than lime juice (about 47 gl), nearly twice the citric acid of grapefruit juice, and about five times the amount of citric acid found in orange juice.