In 2020, world production of lemons (combined with limes) was 21.4 million tonnes; lemons are a member of the citrus family (citrus limon) and is an oval shaped, bright yellow fruit ranging in size from 2 to 3 inches (5 to 8 cm) – its top producers are India, Mexico, China, Argentina, Brazil, and Turkey (collectively accounted for 65% of global production).
Lemon juice contains slightly more citric acid than lime juice, nearly twice the citric acid of grapefruit juice, and about five times the amount of citric acid found in orange juice – citric acid has various health and skin benefits, it can also help prevent viruses.
Lemon is a rich source of vitamin C, providing 64% of the Daily Value in a 100 g reference amount – vitamin C is an essential nutrient involved in the repair of tissue, the formation of collagen, and the enzymatic production of certain neurotransmitters.
Lemons contain numerous phytochemicals, including polyphenols, terpenes, and tannins – the phytochemical category includes compounds recognized as essential nutrients, which are naturally contained in plants and are required for normal physiological functions. Non-digestible dietary fibers from plant foods, often considered as a phytochemical, are now generally regarded as a nutrient group having approved health claims for reducing the risk of some types of cancer and coronary heart disease.
[Eating a diet high in fruits, vegetables, grains, legumes and plant-based beverages has long-term health benefits, but there is no evidence that taking dietary supplements of non-nutrient phytochemicals extracted from plants similarly benefits health. Phytochemical supplements are neither recommended by health authorities for improving health nor approved by regulatory agencies for health claims on product labels.]
Adding lemon juice to water is a tastier alternative that can help you meet your water goal and vitamin C requirements.
(As a food enthusiast, I would recommend the quantity of upto 3 lemons per person per week.)
(Ref. Wikipedia, Medical News Today)