Prebiotics are insoluble fibres which the human body cannot break. They cannot be digested in the small intestine as the body lacks the enzyme that breaks them down , so they travel to the large intestine where they are fermented thereby producing a byproduct which serves as food for the good bacteria (Probiotics). In other words, prebiotics serve as food for probiotics and make them grow and multiple.
Dietary sources include salmon, mackerel, herrings, tuna, egg yolk, cheese, butter, beef liver, fortified margarine, fortified milk, fortified cereals and mushroom. Vitamin D can also be obtained through supplements. People who spend most of their day indoors and therefore not exposed to much sunlight, especially children and the elderly, can be given vitamin D supplements in addition to their diets.
Vitamin B1, also called THIAMINE or ANEURINE or ANTI-BERI-BERI is a water soluble vitamin and one of the essential B-group vitamins the body needs to function well. It cannot be synthesized (produced) by human body and should be supplied in the diet.