10
votes
Do we produce Vitamin D in the shade?
The exact value depends on a lot of things - skin tone, the time of day, latitude, how deep the shade is,...
The study Vitamin D effective ultraviolet wavelengths due to scattering in shade found ...
- 6,982
8
votes
Accepted
Do protein bars/shakes provide nutrients that your body can use?
What you are asking about is called bioavailability, which is the term for how much of a consumed substance is actually taken up by the body, and bioequivalence, which is about whether two products ...
- 6,982
8
votes
Accepted
Do you need to consume iodised salt?
Iodine is absolutely an essential mineral, and is required for proper functioning of your body. It is a component of the thyroid hormone triiodothyronine (also known as T3) and its precursor form T4 (...
- 273
7
votes
How to gain weight naturally or by food around the house
Unless you are very short, your weight indicates that you are severely underweight, see here for details. If you are indeed underweight, then you should follow the advice given there:
If you are ...
- 2,260
6
votes
Accepted
Is there an objective answer to whether or not taking a multi-vitamin dietary supplement is beneficial to health?
Is there an objective answer to whether or not taking a multi-vitamin dietary supplement is beneficial to health?
No, there is not.
If you dig into the existing research, unless you are looking to ...
- 651
6
votes
Is there a relationship between vitamin D levels and cholesterol?
According to a couple of systematic reviews of studies, there is insufficient evidence about the lowering effect of vitamin D on blood cholesterol levels.
Vitamin D, Evidence Mayo Clinic (data from ...
- 15.8k
6
votes
Can effervescent multivitamin tablets cause teeth problems?
Couldn't find any articles directly looking at effervescent tablets and dental problems, so I took a more broad look and searched for citric acid's effect on teeth.
The combination of citric acid and ...
- 555
6
votes
Accepted
How much Vitamin D does the body produce if you're out for a whole summer day?
Vitamin D is produced in the skin by UV irradiation of 7-dehydrocholesterol. But vitamin D in the skin is also broken down by UV irradiation and this leads to a maximum equilibrium level of vitamin D ...
- 2,260
6
votes
Does vitamin D supplementation fully replace sun exposure to avoid vitamin D insufficiency?
Nicely, sunlight is best. While we are still not knowing nearly enough concerning all the details, that's a safe bet. Even the supplement lobby acknowledges that:
Despite the increased risk of non-...
- 6,887
6
votes
Optimum / limit daily dose of Vitamin C?
Here are few aspects of high-dose vitamin C supplements.
The upper limit(UL) 2,000 mg for vitamin C is not some sort of recommendation, but a dose, which, if exceeded, can cause nausea and diarrhea, ...
- 15.8k
5
votes
Accepted
Cold pressed canola oil
There doesn't seem to be any evidence of harmful effects of canola oil.
The Mayo Clinic site states :
Health concerns about canola oil are unfounded. Canola oil, which is extracted from the seeds ...
- 441
5
votes
How to gain weight naturally or by food around the house
To increase weight and be healthy eat plenty of food rich in proteins (black beans, chickpeas, broccoli, potatoes, mushrooms), carbohydrates (Whole grain bread, pasta, cereals) and fat (avocado, olive ...
- 292
5
votes
Accepted
Vitamin supplements with a balanced diet
Vitamins and minerals from foods an supplements taken simultaneously can be absorbed normally, because their absorption is usually not regulated by the amounts you take. However, the absorption of ...
- 15.8k
5
votes
How much Vitamin A is in 1g of Fish Oil?
According to USDA Food Composition Database, 1 gram (or even 100 grams) of fish oil from sardines, herring, salmon and menhaden contains 0 (zero) μg vitamin A.
Tolerable Upper Intake Levels for ...
- 15.8k
5
votes
Excluding individuals that do not lack nutrients: What limits the quality of multivitamins, and how to address it?
what's the cause of multivitamins' ineffectiveness?
Multivitamins are ineffective because in ordinary people with an ordinary diet, there isn't any deficiency to correct. The evidence for this is ...
- 13.8k
4
votes
Accepted
Does taking Vitmain B-Complex with zinc through tablets really help in reversing hair fall
I found an expert answer for your question. May be this will help you to take right decision.
NDTV Doctors:
"There is no harm in taking a combination of B-complex vitamins with
zinc but there is ...
- 160
4
votes
restoring a live tooth
No, there is no evidence in reputable sources that any diet can restore a partially removed tooth to a full tooth again.
Any source you do encounter which proposes such a possibility is highly likely ...
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4
votes
Accepted
Quantitatively and relative to the RDI of 900 μg, when does Vitamin A consumption become harmful?
The quantitive figures for Vitamin A overdose are well established, and widely published.
The RDI in the United States (Different countries may have different values) is 900 micrograms for men, and ...
- 6,660
4
votes
Does one absorb more nutrients from juices than the whole fruit?
This might be true for some substances and false for others. For example, might be true for beta-carotene:
Soluble fiber may inhibit ß-carotene absorption; therefore, consumption of juice may ...
4
votes
Is there an objective answer to whether or not taking a multi-vitamin dietary supplement is beneficial to health?
In a perfect world, no, a multivitamin wouldn't be needed. However, even with high intake of fruits and vegetables, you have to consider micronutrient degradation in fresh fruits that you buy in the ...
4
votes
Where do RDI (recommended daily intake) values come from?
Assuming that you are asking about the US, the documents explaining the RDA (recommended dietary allowance), AI (adequate intake), and UL (tolerable upper intake level) are available on the website of ...
- 6,982
4
votes
Accepted
Supplements: When and how to take them to maximize absorption
To get the most of your vitamins/minerals is quite simple, really.
There are two types of soluble vitamins/minerals:
Water-soluble
Fat-soluble
Absorption of water-soluble vitamins is quite easy, ...
- 490
4
votes
What is alkaline food's actual impact on internal ph regulation?
Yes, there is evidence that alkaline food affects internal pH, but it is important to note that the regulation of internal pH (acid-base homeostatis) has other contributing factors, which is why the ...
- 286
4
votes
Are synthetic vitamins harmful?
Without providing links to any of these claims, it's not really possible to say anything about them. If these "synthetic vitamins" are different than normal vitamins, sure, they could potentially have ...
- 141
4
votes
Accepted
Understanding google's nutrition chart
The chart says that 100 grams of chickpeas have 364 calories, and 6 grams of total fat. It also tells you that the 6 grams of total fat is 9% of the "daily recommended value" for fat: this ...
- 13.8k
3
votes
Would putting vitamin pills in a blender alter their effectiveness?
Only a study in which someone would put different vitamins in a blender and measure the eventual changes in their activities could answer this question. Everything else is just a guess or estimation.
...
- 15.8k
3
votes
How to ingest vitamin C for patients after a gastric surgery?
If post gastric bypass patients can eat solid food they can eat soft fruit. And before that they can puree food with fruit juices. As for supplements, vitamin tablets are recommended for most ...
- 13.2k
3
votes
Accepted
Are there any symptoms of Vitamin D deficiency?
WebMD
Signs and Symptoms of Vitamin D deficiency can be subtle, but can manifest as bone pain and muscle weakness. Also, excessive sweating(when not indicated due to exercise level and heat).
...
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3
votes
Can I use take pills to prevent micronutrient deficiencies and not worry about my diet too much?
The biggest issue with using supplements instead of food is that studies don't always measure what they think they're measuring. A lot of near-magical powers were ascribed to Vitamin C, for example, ...
- 3,849
3
votes
Accepted
What vitamins or dietary supplements for internal taking are useful for injured skin?
The process of wound healing is extremely complex and combines several processes that occur after the injury. According to 'Bioengineering In Wound Healing: A Systems Approach,'
These processes ...
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