Question
Why vitamin D, E and K compounds are essential for us? Describe their important sources.

Answer

Deficiency of vitamin D leads to Rickets (bone deformities in children) and osteomalacia (soft bones and joint pain in adults), so it is essential for us. Important sources are exposure to sunlight, fish and egg yolk.
Deficiency of vitamin E leads to increased fragility of RBCs and muscular weakness, so H is essential for us. Important sources are vegetable oils like wheat germoil, sunflower oil etc.
Deficiency of vitamin K leads to increased blood clotting time so it is essential for us. Important sources are green leafy vegetables.

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