A prolonged deficiency will result in defective bone and teeth formation. Bloodshot eyes, Sties, Inflammation of the eye and burning sensations. More than 100,000 IU of Retinol, preformed vitamin A, may be toxic if consumed for several months by an adult. Children can have reactions if more than 18,000 IU of Retinol are consumed on a daily basis for an extended period of time. Excess symptoms are, nausea, vomiting, diarrhea, hair loss, blurred vision, rashes, bone pain, scaly skin, fatigue, headaches, liver enlargement, Nervousness and irritability in children.
All B vitamins are soluble in water.
B vitamins have been recognized as coenzymes and they all appear to be essential in the metabolic processes of all forms of animal and human life. Vitamin C is a water soluble vitamin. It is an antioxidant. It has more multiple complex effects on a variety of biological activities. It is more widespread than those of any other nutrient.