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Questions tagged [vitamins]

An organic compound required as a vital nutrient in tiny amounts by an organism.

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1answer
424 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, ...
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1answer
1k 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 ...
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2answers
826 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. ...
4
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1answer
151 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 ...
3
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1answer
456 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. For ...
13
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0answers
234 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?
7
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1answer
2k 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 ...
8
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0answers
1k 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 ...
7
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1answer
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 ...
7
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1answer
649 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 ...
6
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0answers
201 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 ...
7
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1answer
652 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, ...
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2answers
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 ...
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1answer
792 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。 ...
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1answer
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, ...
18
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1answer
12k 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 ...
9
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1answer
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 ...
18
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1answer
16k 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?
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2answers
852 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 ...
11
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1answer
689 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 ...
15
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1answer
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 ...
23
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3answers
3k 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, ...
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3answers
6k 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 ...
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3answers
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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 ...