Vitamin C. Vitamin C is also a water-soluble vitamin that is absorbed directly into your bloodstream in your small intestines after it has been freed from food. Vitamin C is essential for good health and plays a number of important roles in your body.itamin C in red peppers is absorbed into your bloodstream in the small intestines. Photo Credit Design Pics/Design Pics/Getty Images. Most of the nutrients in the food you eat -- such as protein, fats, carbohydrates and fat-soluble vitamins -- need to undergo some amount of digestion before they can be absorbed.