Ascorbic acid or Vitamin C is very important in our body because of its antioxidant property. But the main problem; that vitamin C uses is to maintain the stability as well as its drug distribution system. Vitamin C also plays a protective role in diabetes, cancer, heavy metal toxicity or poisoning, etc. Vitamin C is found in many sources present in nature, including tomatoes, broccoli, etc. Many factors in the body, as well as outside the body, affect the content of vitamin C in the body or sources like the season, climate, and pollution affect the content in fruits and vegetables besides sex, age, pregnancy, lactation, etc. affect the vitamin C content in the body. It is extensively used in the common cold, wound healing process, cancer, heavy metal poisoning or toxicity, and even in men's fertility. In this article, we focused on the general aspects: its bioavailability, sources, its toxicity and deficiency, and factors affecting vitamin C level as well as its use in humans. In the last, we conclude, the excess or lack of Vitamin C, both conditions have affected the human body in a significant range. It plays a protective role against many disorders and is required for kids, men, women, and even old-aged patients
