Doctor insights on:
What Does Vitamin D3 Do For The Body
D does many things!: Vitamin d3 is quite essential for many things. The skin will make this on exposure to sunlight, but most people still need it as a supplement. It is necessary to absorb calcium from the GI tract, and prevent osteoporosis. But it bolsters the immune system, helps prevent prostate, breast, and colon cancers, and heart disease as well. ...Read more
Active hormone: Hi. Vitamin D per se has no direct effect in the body. Vitamin D is 25-hydroxylated in the liver. 25-hydroxyvitamin D is converted to the active hormone, calcitriol, in a tightly regulated step in the kidneys. Calcitriol is the active agent. It regulates gene expression in target tissues (gut, bone, muscle, etc). Calcitriol helps with calcium homeostasis, bone & muscle health, balance, etc. ...Read more
Its made inside: Sun exposure is an easy, reliable way for most people to get vitamin d. Exposure of the hands, face, arms, and legs to sunlight two to three times a week for about one-fourth of the time it would take to develop a mild sunburn will cause the skin to produce enough vitamin d. The necessary exposure time varies with age, skin type, season, time of day, etc. Still, vitamin d deficiency is very common. ...Read more
VIT D: Is made in the skin and the light spectrum needed is best between noon and three pm daily for 15-20 minutes -without sunscreen. Sunscreen blocks vit d synthesis by 95%. Staying indoors and not being in sun between 10 am and 4 pm reduces our exposure. As said before... Poor diet and chronic illnesses . And living above the 34th parallel all contribute. Serum levels are optimal at 50-70. ...Read more
Enough sunlight: Hi. Humans can make our own vitamin D in the skin upon exposure to UV light in sunlight. This vitamin D (vitamin D3) then has a hydroxyl group (-OH) added on to the 25 position in the liver in an unregulated step, creating 25(OH)vitamin D. This is then converted to the active form, calcitriol by addition of an -OH group at the 1 position in a tightly regulated step (regulated by PTH and FGF-23). ...Read more
Stay out: In the sun, but sunscreen will block the rays. Eat more food with natural or added vitamin d content. Take a vitamin d supplement -- usually 2000 u vitamin d3/day for most people. Check w/your doctor to get measured and advised. ...Read more
Vitamin D benefits: Vitamin D can help prevent heart disease, diabetes, osteoporosis, & even some cancers. Because many of us can't get enough from the sun, taking a supplement may be a good idea for some. Get your levels checked at your next check-up so you'll know if you need more. (Ref. Bhg.com) ...Read more
Excreted in urine ;: The government requirement for minimum levels of vit d is too low. This is the level you need to prevent rickets! You need to have your vitamin d level checked in your blood. When you replace vitamin d with supplements you need to take vitamin d3. Excess vit d that is not absorbed will go out in your stool and urine. ...Read more
Vitamin D is absorbed by your skin when exposed to sunlight in late spring and in summer.
That does not mean that you should not use sunscreen.
Enjoy your summer but also go to a store and buy vitamin D 1000 units — they are inexpensive and not harmful. ...Read more
Importance of Vit D:
It is very important to have vitamin d levels over 30 in most of the people because we know that vitd protects us against cardiovascular disease, cancers, cognitive impairment, hypertension, type 2 diabetes, asthma in children.
Unfortunately we don't get enough vit d in our diet and do not get enough sun exposure to make vit d in our body. ...Read more
Is vitamin d already present inside the body or do we just generate it by staying in the sunlight and eating vitamin d foods?
Produced by sunligh: It is produced by exposure to sun light, but some foods are fortified like milk. There are small quantities of vit d in salmon, mackerel, mushrooms, cod liver oil, tuna canned in water, sardines canned in oil, egg yolk, milk or yogurt, cheese and beef or calf liver. ...Read more
How long do I need to expose my body to the sun (per day) to get vitamin d and sun benefits? Is it fine at any time of the day?
Latitude and time: During summer, you need about 20 min at mid day, longer at other times of day. In winter, or extreme northern latitudes, it takes longer. This is why there is usually a seasonal winter drop in blood vit d levels. ...Read more
Will laying out in sun w proper body exposure for 20 min be just as effective as taking vitamin d pill? How many iu d u get from 20m sun?
Bone health & more: Vitamin D & calcium are involved in bone health eg prevention of rickets & osteoporosis — check out http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/health-tip/art-20048544. The heart, muscles & nerves also need calcium to function properly — check out http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/calcium-supplements/art-20047097 ...Read more
Sunlight: Sunlight on the skin helps convert cholecalciferol to 25 hydroxycholecalciferol. Then the kidney adds another hydroxy to make 1, 25 dihydroxycholecalciferol which is active vitamin d. ...Read more
Is it possible that taking Prozac depletes vitamin d in your body or keep body from synthesizing it?
Not really.: This is not a reported or expected consequence of taking this medication. By the way, many consider normal Vit D levels anything greater than 20. Given your latitude you might expect your levels to be a bit on the low side. ...Read more
Dairy/Supplements: Usually dairy products have vit d. Also, certain cereals, breads may be fortified with vitamin d. ...Read more
If I am a body builder with 6% body fat is my serum vitamin d requirement higher than normal peoples(>30)?
No reason: There is no evidence that a level way higher than 30 will do any good. Even > 20 may do the job. Why would you ever ask this question? ...Read more
I take vitamin D and calcium every day. I'm 56 and was told when we get older the body doesn't absorb enough D from sunlight. Is this true?
Measurement Required: Cannot correctly begin to control what is unknown/not measured. Healthy vitamin D3 (what counts) concentrations in the 70-80 ng/ml range. Vitamin D is not absorbed from sun. Sun tends to trigger conversion of a little cholesterol in skin cells to Vit D, then converted in liver to D2 & by kidneys & other tissues to D3. D3 impt for Ca absorption from food, bone & muscle strength + immune function. ...Read more
Hi! I have a very low rate of calcium and vitamin d in my body! So I was told to take vitamind by pills but is there another way to raise that rate?
Depends on cause?: You got to have reason for low Calcium level. We don't know how low your calcium level is&if you are symptomatic. Calcium in blood is bound to albumin, so if your albumin level is low it will show low calcium level. The other causes are Hypoparathyroidism, High level of phosphate due to kidney disease, celiac disease, pancreatitis and alcoholism. Treated by treating the cause and oral calcium and VitD ...Read more