It is one of the very low calorie vegetables. 100 g fruit provides just 26 calories and contains no saturated fats or cholesterol; however, it is rich in dietary fiber, anti-oxidants, minerals, vitamins. The vegetable is one of the food items recommended by dieticians in cholesterol controlling and weight reduction programs.
Pumpkin is a storehouse of many anti-oxidant vitamins such as vitamin-A, vitamin-C and vitamin-E.
At 7384 mg per 100 g, it is one of the vegetables in the Cucurbitaceae family featuring highest levels of vitamin-A, providing about 246% of RDA. Vitamin A is a powerful natural anti-oxidant and is required by the body for maintaining the integrity of skin and mucusa. It is also an essential vitamin for good visual sight. Research studies suggest that natural foods rich in vitamin A may help human body protect against lung and oral cavity cancers.
It is also an excellent source of many natural poly-phenolic flavonoid compounds such as a, ß carotenes, cryptoxanthin, lutein and zea-xanthin. Carotenes convert into vitamin A inside the body.
Zea-xanthin is a natural anti-oxidant which has UV (ultra-violet) rays filtering actions in the macula lutea in retina of the eyes. Thus, it may offer protection from "age-related macular disease" (ARMD) in the elderly.
The fruit is a good source of B-complex group of vitamins like folates, niacin, vitamin B-6 (pyridoxine), thiamin and pantothenic acid.
It is also rich source of minerals like copper, calcium, potassium and phosphorus.
Pumpkin seeds indeed are an excellent source of dietary fiber and mono-unsaturated fatty acids, which are good for heart health. In addition, the seeds are concentrated sources of protein, minerals and health-benefiting vitamins. For instance, 100 g of pumpkin seeds provide 559 calories, 30 g of protein, 110% RDA of iron, 4987 mg of niacin (31% RDA), selenium (17% of RDA), zinc (71%) etc., but no cholesterol. Further, the seeds are an excellent source of health promoting amino acid tryptophan. Tryptophan is converted to GABA in the brain.