Can sunblock reduce vitamin d synthesis?

Yes, but... Uv radiation promotes vitamin d synthesis, and sunblock helps reduce uv radiation exposure, but it doesn't take much sun to maintain vitamin d and you can also get vitamin d from your diet. So eat right and keep using that sunblock.

Related Questions

MY VITAMIN D IS L 23, IF I TAKE THE SUN N WEAR SUNBLOCK WILL I STILL GET VITAMIN D OR THE SUNBLOCK BLOCKING IT??

No. Vitamin D deficiency is epidemic. You need a supplement or increased Vitamin D intake over the counter. Discuss with your doctor. Read more...
Block Blocks D Too. Sunblock, car windows, clothing, etc. all block the benefit of the sun on Vitamin D. I usually recommend supplementation to achieve levels higher than the currently recommended 30 ng/dL. I also will initially check iPTH (a hormone involved in Ca metabolism with D) and adjust the doses on an individual basis as it is one of the few "vitamins"-it is actually a hormone-you can get too much of. Read more...

If I put sunblock cream (spf 50 or 100) on my skin and expose my body to the sun, will I get vitamin d normally?

No. When the sun's uv b rays hit out skin, we turn inactive d to active vitamin d. So if you are wearing sunscreen that blocks those rays, then your body will not perform this process and you could be at risk for vitamin d deficiency. You can get a blood test to determine your vitamin d levels. Read more...

Are you getting vitamin d if you wear sunscreen but your skin gets darker?

Some. You get some vitamin d made in the skin from sun exposure, but it depends on skin color, sun screen, duration, intensity, geographic location and other factors.Generally, unless you live in the sunbelt, there is insufficient sun exposure during a significant portion of the year. Tanning is not the same as vitamin d metabolism, and actually leads to lower sun exposure due to increased pigment. Read more...

How many hours a week does a 20 year old have to spend in the sun, without a shirt or sunscreen, to get enough vitamin d?

At most 1/2 hour. The skin rapidly produces sufficient vitamin d on sun exposure. In 1/2 hour you have made 10, 000 units of vitamin d3, quite adequate for any known needs. After than you run the risk of sunburn, skin changes and possibly cancer later in light (if done often) although you might tan with repeated exposure (if that is one of your goals). Read more...
~10 minutes a day. The amount of time needed to synthesize an adequate amount of vit d varies by skin type and latitude. 20-30 minutes of exposure to the arms and legs 3 times a week is usually sufficient. With the shirt off, more skin is exposed. This needs to be coupled with adequate dietary intake. If there is a concern of vit d deficiency, see your doctor. Read more...

How many hours a week do children 6-10 years old have to spend in the sun, without shirts or sunscreen, to get enough vitamin d?

Difficult to Tell. The vitamin d our body needs can either be produced by sunlight or by consumption. How many hours your child would need to be in the sun is influenced by surface area exposed, longitude, skin color and sun-block. Children from 1-18 are recommended to get 600 units/day; consider a daily vitamin. For light skin and direct sunlight, 10-15 minutes a day or 1-2 hours a week should be enough. Read more...
At most 1/2 hour. The skin rapidly produces sufficient vitamin d on sun exposure. In 1/2 hour you have made 10, 000 units of vitamin d3, quite adequate for any known needs. After than you run the risk of sunburn, skin changes and possibly cancer later in light (if done often) although you might tan with repeated exposure (if that is one of your goals). Read more...

How do you get vitamin d with sunscreen on?

Oral supplements. Grest question but oral supplementation with vitamin pills or supplemented food are one source but any sun exposure will provide a source of vitamin d even with sunscreen. Read more...

Can I still get vitamin d when I use sunscreen?

No. Sunscreen will block the uv rays and thus the activation of the vitamin d in your skin. The extent of this blockage depend on what spf you use and the amount of time you are exposed to the sun. Check this video about vitamin d: http://otwithmd.Com/vitamin-d/. Read more...