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Can I take vitamin D3 and D together?

healthyeating.sfgate.com - Can You Take Both D2 and D3 Vitamin D? - Healthy Eating | SF Gate

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Commonly referred to as the sunshine vitamin, vitamin D plays a significant role in health and chronic disease prevention. In a 2007 article published in "The New England Journal of Medicine," Dr. Michael Holick states that vitamin D may reduce the risk of autoimmune, infectious and cardiovascular diseases and some cancers. Vitamin D supplements come in two forms, D2 and D3, both of which increase blood levels of vitamin D.

Vitamin D Defined

The two types of vitamin D are D2, or ergocalciferol, and D3, also known as cholecalciferol. D2 is synthesized in plants and is available in supplements and some foods, such as egg yolks and shitake mushrooms. Your body synthesizes D3 when you expose your skin to ultraviolet-B rays from the sun or a tanning bed. Milk and breakfast cereals are often fortified with vitamin D3, and it is also available in supplement form. The only natural dietary sources of vitamin D3 are certain oily fish. Vitamin D supplements are often necessary for people who get inadequate exposure to the sun and have low intake of the limited dietary sources of the vitamin.

Taking D2 and D3

The two types of vitamin D have no negative interactions with each other, so you can safely take them together. However, the body converts both forms of vitamin D to the same active form, called calcitriol. Vitamin D is a fat-soluble vitamin, meaning that your body stores it in fat, so you must monitor the total combined amount of vitamin D supplements that you are taking each day to ensure that your intake is appropriate.

Recommended Amounts

The Food and Nutrition Board recommends that healthy adults obtain 600 international units (IU) of vitamin D per day. That number includes vitamin D from both D2 and D3. However, many scientists believe that more than 600 IU is necessary to receive all of vitamin D's health benefits. The Food and Nutrition Board has also set a tolerable upper intake level of 4,000 IU per day, but vitamin D toxicity is rare and many scientists believe that you would need to take doses in excess of 10,000 IU per day to develop symptoms of toxicity.

D2 versus D3

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Can enlarged prostate interfere with bowel movement?

An enlarged prostate can affect bowel movement but is not common. The prostate rests under the urinary bladder, just in front of the lower rectum. Because they are so close to one another, it is not unusual for one to affect the other.

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The main cause of prostate enlargement is primarily a function of genetics and time. If there is family history of prostate enlargement it is more likely you will experience symptoms related to prostate enlargement. Those over 60 years old are more likely to experience symptoms related to prostate enlargement, though some can experience symptoms as early as their 40s. Usually prostate enlargement happens very gradually as you get older. The prostate is a gland that sits at the bottom of the bladder and wraps around the urethra. The urethra is like a tube, where urine exits through from the bladder to the outside of the body. The prostate glands are part of the male reproductive system. They produce portions of semen (ejaculate) and surround the ducts that carry semen into the urethra during orgasm/ejaculation.

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