Vitamin D

if you're taking supplments to a total of 200% of the RDA of Vitamin D (10ug), are there likely to be any overdose side effects or is this safe? Medics? I have googled overdose levels but they all come up with IU levels, and I don't know how that related to the ug levels quoted on the back of the tub of supplements...

thanks

Reply 1

Bis

1

there can be side effects, it is fat soluble. vit d toxicity can cause things like vomiting, bad appetite, constipation, nausea, weakness, calcification, urination stones, etc. i doubt very much 10ug would be sufficient for this though. old people are advised to take that much.

Reply 2

Jenna999

OP

1

fat soluble? obviously i know what that means literally, but what does it mean in this sense?

Reply 3

34253

2

bis432

there can be side effects, it is fat soluble. vit d toxicity can cause things like vomiting, bad appetite, constipation, nausea, weakness, calcification, urination stones, etc. i doubt very much 10ug would be sufficient for this though. old people are advised to take that much.

Californiacation is a common side effect of over dosing on vitamin D.

Reply 4

RetiredAccount89

18

Jenna999

if you're taking supplments to a total of 200% of the RDA of Vitamin D (10ug), are there likely to be any overdose side effects or is this safe? Medics? I have googled overdose levels but they all come up with IU levels, and I don't know how that related to the ug levels quoted on the back of the tub of supplements...

thanks

no, that would be safe. though i would ask if you're sure its necessary? do you get much sun (i know its winter, but in summer and generally do you go outside with arms or legs exposed) cos if you do and are white then i doubt you'll need it.
200% of RDA of VitD won't hurt you though. not in winter especially.

Reply 5

-Leo-

I remember something about fat soluble toxins being able enter fatty adipose tissue and remaining there for many years. Ie. An overdose could cause long term effects. Feel free to correct me though,

Reply 6

Bis

1

Jenna999

fat soluble? obviously i know what that means literally, but what does it mean in this sense?

fat soluble vitamins are stored in the liver and fatty tissue, so they are eliminated a low slower than water soluble vitamins (water soluble vitamins are easily absorbed by the intestinal tract and whatever is left is flushed out of the body during urination) and stay in the body for longer, meaning that there is a higher chance of vitamin toxicity when too much is consumed.

Reply 7

Jenna999

OP

1

oh right... i'm not lacking in vitamin D to the person that asked if it was necessary, i am lacking in calcium and my calcium supplement also contains 100% RDA of vitamin D. on top of that i take my vitamin andmineral supplement which also happens to contain 100% vit D RDA. don't really want to give up either.

if its fat soluble it doesnt mean i'll gain weight easier does it?

Reply 8

Bis

1

not exactly.

Reply 9

Jenna999

OP

1

but it might a bit? please elaborate!

Reply 10

Bis

1

no i don't think it will noticeably affect that. but you will be consuming a lot of vitamin d, from other foods and even sunlight on top of your 200% extra from supplementation. why don't you get a multivitamin/mineral complex with added calcium instead?

Reply 11

Barny

17

The RDI are values set to avoid deficiency, optimum values and maximum values will be far far greater. You are VERY unlikely to suffer ill effects from taking 200% RDA of Vitamin D, however, you might need to be careful because your vitamin D intake from other foods and sunlight may cause an excessive intake.

Reply 12

RetiredAccount89

18

-Leo-

I remember something about fat soluble toxins being able enter fatty adipose tissue and remaining there for many years. Ie. An overdose could cause long term effects. Feel free to correct me though,

you're right, but not for the reasons you give.

Reply 13

brimstone

7

I'm pretty sure you can get all the Vitamin D you need by getting 20mins a day of sunlight

Reply 14

Bis

1

brimstone1

I'm pretty sure you can get all the Vitamin D you need by getting 20mins a day of sunlight

on planet mercury maybe..

Reply 15

brimstone

7

bis432

on planet mercury maybe..

If you look in any book on nutrition, it'll tell you Vitamin D is made by spending twenty minutes in sunlight. Unless you spend all day indoors, a supplement of Vitamin D is unecessary.

From "http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/otherendo/vitamind.html"

The term vitamin D actually refers to a group of steroid molecules. Vitamin D3, also known as cholecalciferol is generated in the skin of animals when light energy is absorbed by a precursor molecule 7-dehydrocholesterol. Vitamin D is thus not a true vitamin, because individuals with adequate exposure to sunlight do not require dietary supplementation. There are dietary sources of vitamin D, including egg yolk, fish oil and a number of plants. The plant form of vitamin D is called vitamin D2 or ergosterol. However, natural diets typically do not contain adequate quantities of vitamin D, and exposure to sunlight or consumption of foodstuffs purposefully supplemented with vitamin D are necessary to prevent deficiencies.

Insufficient exposure to sunlight: Elderly people that stay inside and have poor diets often have at least subclinical deficiency. Ironically, it appears that hypovitaminosis D is very common in some of the most sunny countries in the world - the cause of this problem is the cultural dictate that women be heavily veiled when outside in public.

Sunscreens, especially those with SPF ratings greater than 8, effectively block synthesis of vitamin D in the skin. However, people that use such sunscreens religiously live in industrial countries where many foods are supplemented with vitamin D, and vitamin D deficiency is thereby averted by dietary intake.

Excessive exposure to sunlight does not lead to overproduction of vitamin D. Vitamin D toxicity is inevitably the result of overdosing on vitamin D supplements. Don't do this!

Reply 16

Bis

1

no. if you think that a few minutes in the sun means dietary vitamin d is not required then you have absolutely no idea what you are talking about.

Reply 17

brimstone

7

bis432

no. if you think that a few minutes in the sun means dietary vitamin d is not required then you have absolutely no idea what you are talking about.

I did not say that, I said that 20 minutes daily sunlight can supply the Daily Recommended Allowance for Vitamin D, although the amount of time obviously varies (due to race, how much skin is showing, sun intensity, etc). Pick up any book on nutrition, and it will tell you the same.

Reply 18

Bis

1

i don't know what books you've been reading. i've read plenty of books on nutrition, and that's not right. i would explain but i can't be bothered right now.

Vitamin D

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