Generic Name: cholecalciferol 

Vitamin D3 is needed for normal absorption of calcium and phosphorus, which is further utilized for development and maintenance of bones and teeth. This makes bones stronger and reduces risk for bone fractures.  Vitamin D3 also has a role in ones nerve, muscle, and immune systems.

People who might need extra vitamin D3 include

•  Older adult
•  Breastfed infants
•  People with dark skin
•  People with certain conditions, such as liver diseases, cystic fibrosis and Crohn's disease
•  People who have obesity or have had gastric bypass surgery

Symptoms of vitamin D3 deficiency include bone pain, muscle weakness, fatigue, and mood changes. Vitamin D3 is used for treating osteoporosis, rickets, osteomalacia, renal osteodystrophy and hypoparathyroidism.

•   nausea
•       vomiting
•         constipation
•         weight loss
•        weakness
•         increased calcium levels (hypercalcemia)

May cause allergic reactions or other problems if contain inactive ingredients such as peanut/soy. Pregnant women or Breastfeeding mothers need to consult their doctors before taking Vitamin D3 supplements.

• Vitamin A is vital for a healthy immune system, bone growth, vision, cell recognition and reproduction. Vitamin A often works as an antioxidant, fighting cell damage, but it also has many other uses. It has a vital role in the formation of heart, lungs, and kidney.
• Other functions of vitamin A include the formation and maintenance of teeth, bones, soft tissue, white blood cells, the immune system and mucus membranes. 
• Most people get enough vitamin A from their diets. However, a doctor might suggest vitamin A supplements to people who have vitamin A deficiencies. People most likely to have vitamin A deficiency are those with diseases (such as digestive disorders) or very poor diets.

• Vitamin A is used for improving the eyesight, maintaining cells of the skin and the lining of the digestive, urinary and respiratory tracts.
• It also helps in the formation of red and white blood cells in our body that are important to carry out the various essential functions of our body.
• Topical and oral retinoids are common prescription treatments for acne and other skin conditions, including wrinkles. 
• Oral vitamin A is also used as a treatment for measles and dry eye in people with low levels of vitamin A. 
• Vitamin A is also used for a specific type of leukemia.
• Vitamin A has been studied as a treatment for many other conditions, including cancers, cataracts, and HIV. However, the results are inconclusive.

• Night blindness
• A higher risk of infections, especially in the throat, chest, and abdomen
• Follicular hyperkeratosis, leading to dry, bumpy skin.
• Fertility issues
• Delayed growth in children
• Symptoms of vitamin A toxicity include dry skin, joint pain, vomiting, headaches, confusion.

• If you take too much of Vitamin A, it can lead to birth defects, abnormalities of the liver and disorders of the central nervous system.
• It can also decrease bone mineral density, leading to an increased risk of osteoporosis.
• This is because an excess of Vitamin A suppresses the building up of bones and increases its breakdown.
• The rate of calcium absorption by Vitamin D can also get affected due to excess of Vitamin A. Therefore, it is advised to use Vitamin A only as directed by your doctor.
• Interactions. Vitamin A supplements may interact with some birth control pills, blood thinners (Coumadin), acne medicines (isotretinoin), cancer treatments, and many other drugs.
• People who drink heavily or have kidney or liver disease shouldn’t take vitamin A supplements without talking to a doctor.