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-...
- 6,918
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 ...
- 2,270
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 ...
- 15.9k
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
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, ...
- 15.9k
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 ...
- 15.9k
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 ...
- 15.9k
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 ...
- 14.3k
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
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
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
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
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 ...
- 14.3k
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 ...
- 958
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, ...
- 3,979
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 ...
- 13.3k
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.
...
- 15.9k
3
votes
Does boiling milk really make the nutrients in it less useful to the body when ingesting it?
In short: Cooking milk has probably only a minor effect on its nutritional value.
MICRONUTRIENTS:
According to USDA Table of Nutrient Retention Factors (p. 5), in milk heated for 10 minutes, the ...
- 15.9k
3
votes
Accepted
Are synthetic vitamins harmful?
In general, for healthy non-pregnant individuals, synthetic vitamins are:
Unnecessary, until you have a balanced mixed diet
Less efficient than vitamins naturally present in foods, because they do ...
- 15.9k
3
votes
Accepted
Should antioxidants such as turmeric, resveratrol, glutathione, etc. be taken at bedtime, and if so, what explains it?
This question has an implicit claim in it: that taking antioxidants is effective in the first place. As that is very much in doubt now from the start, it explains very well why there is no consensus ...
- 6,918
3
votes
Is vitamin B12 in supplements protected from stomach acid?
I haven't found any source that would claim that a normal level of haptocorrin in saliva is a limiting factor for the absorption of vitamin B12 from supplements.
On the other hand, haptocorrin ...
- 15.9k
3
votes
How much Vitamin A is in 1g of Fish Oil?
Vitamin A is an important Vitamin in my opinion. See, importance for Children 6-59 months https://www.who.int/elena/titles/vitamina_children/en/
So age is a consideration. Here is the Pauling ...
- 392
3
votes
Accepted
Can (mal)nutrition cause muscle twitches?
Muscle twitches (fasciculations) caused by malnutrition are usually (not always) associated with muscle cramps.
Malnutrition-related causes of twitches include severely insufficient nutrient intake (...
- 15.9k
2
votes
Do vitamins protect you from common cold?
Research results are somewhat inconsistent but generally seem to be unfavorable to vitamins alone (in contrast to vitamins in combination with other things).
From "Prevention and treatment of the ...
2
votes
Vitamin B food source
The best are deactivated yeast or the extract and
Sunflower seeds(Source USDA) http://nutritiondata.self.com/facts/nut-and-seed-products/3076/2
Other choices(Source USDA) but not limited to; include
...
- 101
2
votes
Accepted
Vitamin B food source
Here on Nutrients Review you have lists of foods high in individual vitamins B.
Here on US Department of Agriculture (USDA) are more detailed lists of foods high in individual vitamins and other ...
- 15.9k
2
votes
Are there any known health risks with taking megadoses of beta carotene?
Drawing on my previous answer about Vitamin A risks, the only known risk of large doses of carotenoids is an increased risk of lung cancer if you smoke or work with asbestos.
- 2,055
2
votes
Are fizzy "Effervescnt C" drinks any better than Vitamin C pills?
Effervescent pills have the advantage that since you ingest the active compount already dissolved the absorption rate is generally faster than for normal pills. This is useful when you need the drug ...
- 424
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