Quick Answer. The effects of caffeine start within 10 minutes after it is consumed, according to ScienceDaily. However, caffeine requires 45 minutes to reach its maximum concentration in the blood. Continue Reading.
The heart, blood, and blood vessels are the three structural elements that ... These nutrients enter the bloodstream by passing through the walls of the intestine.he heart, blood, and blood vessels are the three structural elements that ... These nutrients enter the bloodstream by passing through the walls of the intestine.
Another nutrient important in the clotting of blood is the vitamin D, this vitamin is manufactured on the skin with the aid of sunlight, and a good food source of this vitamin is through the consumption of fatty fishes such as the mackerel and salmon.