All Questions
26 questions
46
votes
3
answers
4k
views
Should a healthy adult take a daily multi-vitamin?
Is there any reason for a healthy adult to take a daily multi-vitamin?
My intuition tells me that an adult eating a healthy and balanced diet will get all of the nutrients she needs and that taking a ...
- 5,933
25
votes
1
answer
40k
views
Does Vitamin D created by sun exposure get washed off in the shower?
A recent article by Dr Mercola on a health advocacy web site makes a number of claims about Vitamin D production in your skin. The most surprising to me is the claim that you can wash off a ...
- 5,603
22
votes
3
answers
4k
views
Does organic food have more vitamins than nonorganic food?
Aside from the issue of pesticides there's the claim that organic food has more nutrients, vitamins and minerals than nonorganic food:
Organic food is known to contain 50%
more nutrients, ...
- 34k
20
votes
1
answer
17k
views
Is Vitamin B12 an effective mosquito repellent?
In a question on Travel.SE, a user claimed that Vitamin B12, taken regularly, can be an effective mosquito repellent. Is there any evidence behind this claim?
- 1,727
16
votes
1
answer
6k
views
Ester C, the "better" Vitamin C?
If I recall correctly, Vitamin C plays an important role in the body's immune system. Anecdotal testing by myself gave me the impression that I could ward off a developing cold by the intake of high ...
- 12.4k
16
votes
1
answer
875
views
Can an extra internal refrigerator light increase the vitamin C content of fruit?
My wife yesterday bought a new refrigerator for our house. She choose a refrigerator which within the sales blurb has the following claim.
光波增鲜
生成5种仿自然光波，让采摘后的果蔬继续光合作用，叶绿素、VC含量比存放普通冰箱高30%以上。
...
- 852
15
votes
3
answers
7k
views
What is the latest scientific consensus on megadoses of Vitamin C?
Vitamin C megadoses were first championed by extraordinary chemist and physicist Linus Pauling, I believe, and as prescription for good health they gained by association with him. I have read ...
- 3,773
14
votes
0
answers
244
views
Does shampoo containing pro-B5 affect the appearance of hair?
Many shampoos contain vitamins.
Elvive Vitamax shampoo for example, is variously promised to contain "Vitamin pro-B5" which
makes hair full of vitality.
Is this additive useful?
- 458
13
votes
2
answers
1k
views
Does boiling vegetables wash away important vitamins?
I recently heard that you should steam vegetables instead of boiling them, because boiling washes away the vitamins.
Is this really true? Is there any scientific backing to this claim? Can you really ...
- 1,828
11
votes
1
answer
777
views
Can a lack of Vitamin A in your diet be statistically proven to be linked to worse eyesight?
Reading this question: Does eating carrots improve your eyesight? - brought to mind a common piece of medical advice in USSR - to eat carrots to prevent your eyesight from going bad (as opposed to ...
- 31.4k
9
votes
1
answer
3k
views
Does boiling milk reduce the Vitamin B12 content?
Milk contains vitamin B12.
There appears to be conflicting advice over whether heating milk will reduce its B12 content.
For example, this healthcare site says:
Vitamin B12 is stable at room ...
- 191
8
votes
1
answer
1k
views
Does vitamin D prevent cavities better than fluoride?
Dr. Mercola has released the following article: The Vitamin that is Better than Fluoride in Reducing Cavities. He quotes the VitaminD Council as his source for this:
"There were also several ...
- 21.8k
8
votes
0
answers
1k
views
Do mango seed kernels contain Vitamin B-12?
There are a lot of blog posts and video channels claiming that mango seed kernels contain a high level of vitamin B12. I could find only one academic paper that claimed this:
Some nutrients and ...
- 181
7
votes
1
answer
736
views
Are heart attacks due to Vitamin C deficiency?
According to this book description
Matthias Rath, M.D., an internationally respected cardiovascular
researcher, asserts that high cholesterol is not the actual cause of
heart disease. Bears, ...
- 3,146
7
votes
1
answer
738
views
Do vitamin D supplements help against winter depression?
People like me who live in the northern part of the world, often get a bit depressed at this time of the year, when it's essentially dark when you leave for work and when you get home from work. This ...
- 79
7
votes
0
answers
3k
views
Does contact with metal surfaces reduce the vitamin levels of vegetables?
I have heard that cutting or grating vegetables with metal tools somehow reduces the vitamin content (or as it is sometimes stated "it kills the vitamins"). There are also commercials, which advocate ...
- 71
6
votes
1
answer
1k
views
Do vitamin supplements have any health benefits?
According to some recent research,
Vitamin supplements almost never have health benefits, are a waste of
money and could even be harmful, a group of scientists said in a
damning indictment of ...
- 3,782
6
votes
2
answers
907
views
Are "designer" vitamins more potent than "generic" vitamins?
I had a dietitian tell me that I should never buy vitamins from places like Walmart, Walgreens, or similar stores because the potency is never guaranteed. She said that the potency greatly varies ...
- 1,137
6
votes
0
answers
222
views
Does milk sold in a store with good product turnover lose a significant amount of Vitamin B2 from light exposure?
Anchor New Zealand has just released a milk bottle with a black plastic layer to protect the milk from exposure to light, and thus from loss of "taste and goodness". Their chart:
from their website ...
- 1,266
4
votes
1
answer
4k
views
Does consuming Vitamin C after eating shrimp result in death by arsenic?
I get lots of spam from family and friends, but this one in particular called my attention. It claims that if you eat shrimp and the ingest anything with Vitamin C, in a short period of time you would ...
- 159
4
votes
1
answer
195
views
Are the Vitamins L1 and L2 necessary for rats to lactate?
Nakahara et al write in Identification of Vitamin L1 (Anthranilic Acid):
In 1934, we demonstrated for the first time the existance of a specific dietary factor of lactation, since designated vitamin ...
- 34k
3
votes
1
answer
1k
views
Does Vitamin K2 MK-4 have a half-life of about one hour?
Mercola writes
MK-4 is a synthetic product, very similar to vitamin K1, and your body is capable of converting K1 into MK-4. However, MK-4 has a very short biological half-life of about one hour, ...
- 34k
3
votes
2
answers
2k
views
Do the vitamins in a smoothie degrade when put in the fridge?
I was discussing with a friend about my smoothies consumption and he argued that putting them in the fridge to consume them the next day was not good as the vitamin level/effect drops quickly.
...
- 973
3
votes
1
answer
607
views
Does Vitamin C in Indian Gooseberry have skincare benefits when applied directly to skin, or when eaten?
There are several health product sites making claims about Vitamin C and Indian Gooseberry. They say it helps with skin problems.
Note that "Amla" is one of the names for Indian Gooseberry.
...
- 141
1
vote
1
answer
349
views
Does taking a daily multivitamin reduce chances of miscarriage?
Mayoclinic writes in it's Symptoms & causes of Miscarriage:
Prevention
[...]
Take a daily multivitamin.
I was under the impression that for the average person multivitatmins don't provide health ...
- 34k
1
vote
1
answer
2k
views
Can air conditioner units emit vitamins?
I have seen many examples of air conditioning units that claim they can emit Vitamin C, D, E, etc.
For example, taken from a Gizmodo article:
Fujitsu have again come up with another world first, ...
- 31