Questions tagged [vitamin-d]

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7 votes
1 answer
229 views

General Population Low Vitamin D Levels

In the answer to Is it advisable to wear UV protected swimsuit that covers arms and legs for skin protection to an outdoor swimming pool? by @Anko, it was stated that you can get enough vitamin D from ...
6 votes
3 answers
194 views

Does the use of sunscreen inhibit Vitamin D production?

Vitamin D is produced in the skin when exposed to sunlight. Therefore, when using sunscreen on the skin, is Vitamin D production inhibited?
8 votes
1 answer
189 views

Is there a relationship between vitamin D levels and cholesterol?

I've been trying to read up on high cholesterol and there is a lot of information out there about it. In addition to "don't eat fatty foods" and "exercise more," there are some ...
0 votes
0 answers
42 views

Why did the toxicity recommendation for vitamin D changed the last 20 years?

I have recently noticed that some supplements contain a high number of vitamin D e.g.at least 50mcg (2000IU). That got me curious because references I have, written in early-mid 80s explicity state ...
1 vote
0 answers
35 views

Vitamin D supplement in infants in France [closed]

I live in France, and we have been told to give our baby 3 droplets of a vitamin D supplement that amounts to 3x330 IU = 1000IU. The baby formula amounts (hopefully I did not mix up units) to roughly ...
1 vote
1 answer
101 views

Why would you take Vitamin D twice a week instead of once a day?

After coming up low on Vitamin D on a blood test, I was once prescribed a Vitamin D supplement (Fultium-D3 20,000 IUs). This was on a rather odd basis - instead of a dose every day, it was a whacking ...
0 votes
1 answer
108 views

What is the best natural source of Vitamin D (excluding sun)?

I wonder if there is a top natural source of Vitamin D excluding sitting under the sun to get a good value in RDI or DV? From what I could google, the percentage of Vitamin D in fatty fish is too ...
4 votes
1 answer
120 views

Does the damage from sun exposure outweigh the benefit of getting vitamin D?

I have read some articles where they recommend a direct exposure to the sun of about 20 to 30 minutes, others say that 10 to 15 minutes, another that 5 minutes is enough, etc. I suppose it depends on ...
1 vote
1 answer
315 views

Is It OK to take vitamin tablets every day for long time? [closed]

What is the effect of taking vitamins tablets everyday for a long time? Will that make a person healthier? or harm the kidney? What if a person took them for about three or four months, Can He stop ...
21 votes
2 answers
8k views

Do we produce Vitamin D in the shade?

Do our bodies produce Vitamin D in the shade? If so, what is the percentage decrease in the amount of Vitamin D produced compared to full exposure to sunlight? For example, sitting outside in the ...
1 vote
1 answer
107 views

Is it useless to drip Vitamin D drops on your tongue? [closed]

One celebrity doctor in my country says that Vitamin D can be absorbed only in the small intestine and that dropping Vitamin D drops on your tongue is therefore useless, because most of the liquid ...
1 vote
1 answer
50 views

How long does it take to beat vitamin D deficiency [closed]

I have had vitamin D deficiency (17 ng/mL) and I am planning on sitting in sun at noons. I am aware of that how much UVB you get depends on a few factors such as your complexion, where you live and ...
2 votes
2 answers
3k views

Do UV-B emitting lamps for reptile pets produce vitamin-D in human skin?

There are those lamps like e.g. "ReptiGlow" for pet reptilians, to keep them healthy, the output being graded e.g. by habitat: jungle (trees somewhat reduce the UV that hits the animals), or desert (...
2 votes
1 answer
357 views

Do Elderly benefit from Vitamin D supplements?

For elderly, whose sceletal strength weakens, can Vitamin D supplements slow down the degeneration of bones? I have found this source discussing which supplement works best, but it never established ...
4 votes
2 answers
4k views

Does vitamin D synthesis occur in indirect sunlight?

I know you don't get a tan through a glass window. But I don't know whether tanning and vitamin D are produced using identical wavelengths. So my questions are : -Do you synthesise vitamin D through ...
1 vote
1 answer
41 views

Is vitamin D a very passive xenogenic factor to major depressive disorder?

Are the biosynthesis, utilisation and catabolism systems of vitamin D, especially the pathways of neural cells' vitamin D response, altered by the pathophysiological condition of major depressive ...
14 votes
1 answer
2k views

What needs to be exposed for the body to produce Vitamin D?

What parts of the body need to be exposed to sunlight for the body to produce Vitamin D? Some say it's the skin, some say it's the eyes, and some say it's a combination. The most common answer I ...
3 votes
1 answer
59 views

To what degree does a Vitamin D course mitigate the effects of Primary Hyperparathyroidism?

Primary Hyperparathyroidism, often caused by a parathyroid gland having an adenoma on it, increases the release of the parathyroid hormone (PTH) in the body. This causes the excess release of calcium ...
1 vote
1 answer
88 views

When is vitamin D released from fat?

I understand that vitamin D is a fat soluble vitamin, and that being overweight can adversely affect the availability of vitamin D in the body. It seems that having more fat on the body results in ...
1 vote
1 answer
68 views

Why vitamin D3 is deficient in children and the elderly? [closed]

Vitamin D 3 of the most important vitamins that contribute to the growth of the human body. Why this vitamin is deficient and few in children and the elderly?
2 votes
0 answers
31 views

How long does it take for Vit D medications to show effect?

Being diagnosed with severe vitamin D deficiency, I am on a high dosage (50k IU per week) for the past 2 months. I have also been getting regular sun exposure. But my weakness and other problems ...
2 votes
2 answers
209 views

How much Vitamin D does the body produce if you are outdoors a whole summer day?

How much Vitamin D does a person who's out the whole day in the summer and who's tanned enough that they don't get sunburn produce in a way that's bioavailable (measured in IU)? To get a more ...
4 votes
1 answer
2k views

What type of liver is richest in Vitamin D?

My test reports show that my Vitamin D - 25H (Hydroxyvitamin D) is 6.16 ng/ml whereas the normal range is 30 - 100 ng/ml. So, I read a few articles (e.g. medicinenet, patient.info) on the internet ...
9 votes
2 answers
261 views

Are there any symptoms of Vitamin D deficiency?

I've heard that Vitamin D is mainly obtained from the sun or you have to take supplements. Getting it from the sun also depends on many factors, such as the latitude, time of the day, skin color, area ...