ANATOMY

Detailed explanation-1: -The principal function of vitamin D in calcium homeostasis is to increase calcium absorption from the intestine. Calcium is absorbed by both an active transcellular pathway, which is energy dependent, and by a passive paracellular pathway through tight junctions.

Detailed explanation-2: -So, if you’re taking your Vitamin D supplement at breakfast, lunch, or dinner, you can pair it with a food containing healthy fat. Try eating avocado, whole eggs, fatty fish, nuts, extra virgin olive oil, or full-fat dairy with your supplement to improve Vitamin D absorption.

Detailed explanation-3: -It is probably best known for helping prevent osteoporosis. Your body needs several other nutrients in order for calcium to be absorbed and used properly, including magnesium, phosphorous, and especially vitamins D and K.

Detailed explanation-4: -The two forms of vitamin D in supplements are D2 (ergocalciferol) and D3 (cholecalciferol). Both forms increase vitamin D in your blood, but D3 might raise it higher and for longer than D2. Because vitamin D is fat-soluble, it is best absorbed when taken with a meal or snack that includes some fat.

Detailed explanation-5: -Genetic variations. The absorption of vitamin D is monitored by various factors such as vitamin D protein transporter, nuclear vitamin D binding protein, enzyme involved in fat digestion, bile secretion, liver enzyme catalyzing vitamin D.