Questions tagged [nutrition]

The study of the appropriate provisions required to sustain life in an organism or the provisions themselves.

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2
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1answer
21 views

Is chloride necessary for animals?

Of the twelve well-known atomic constituents of our body eleven elements have specific properties obviously relevant to their rôle, making them indispensable. Oxygen (electronegativity and valence), ...
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Which lipoprotein has the highest protein content?

I know that HDLs have the highest protein/lipid ratio but know that the HDLs are very small molecules too and I couldn’t find the exact answer for this question. I mean, by amounts which of these ...
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Would the amino acid profile of lab-grown human meat perfectly match the dietary nutritional amino acid requirements for humans?

Whey protein is the food which has the most ideal (yet not perfect) amino acid profile for humans, whereas gelatin for example has a very poor and incomplete amino acid profile for humans. Would human ...
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2k views

What chemicals/substances exist in green capsicum (peppers) that do not exist in red capsicum?

I have known 3 people in my life that have incredibly adverse reactions (one called it an "allergy" and his symptoms did resemble such) to consuming any form of green pepper (capsicum) but have no ...
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Does alcohol really helps to get substances get faster into the bloodstream? [closed]

I saw the video where Arnold Schwarzenegger cooks some protein cocktail and adds Austrian Schnapps to the mix, saying that it's to make everything get faster to the blood. Is it true or some kind of a ...
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59 views

How much fat can the body absorb? Implications for daily fat distribution

This question is named analogous to this research: How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution http://ncbi.nlm.nih.gov/pmc/...
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1answer
46 views

Difference between diffusion and osmosis

Osmosis in plants so called diffusion too. Need to understand the difference between osmosis and diffusion Because this both process transport molecules from region of higher concentration to region ...
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2answers
212 views

What is the cause of a protuberant belly in kwashiorkor?

Kwashiorkor is a PEM (Protein–energy malnutrition) usually characterised by a pot belly. Why is there a pot belly in the case of a malnutrition? I have found contradictory reasons. This paper says ...
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108 views

Plants with nutritional requirements similar to Cannabis

What are some short plants that preferably could be grown indoor which have similar nutritional requirements (in terms of N-P-K ratio, doses etc.) as Cannabis? The purpose of this is testing a mineral ...
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9k views

What are the bare minimum nutrients required to survive as a human?

I am trying to determine the bare minimum nutritional requirements to survive as a human, ignoring energy (caloric) requirements. Another way to ask this question is: What elements can humans not live ...
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Why is the nutritive value of grass to humans compared to alternatives?

Cows thrive on eating large amounts of grass. That's because they have specialized digestive processes, such as chewing a cud that maximizes the value of grass to her. Humans who don't have these ...
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Is in the process of making soy protein isolate all (or most) of the protein trypsin inhibitor removed?

Being lactose intolerant and going to the gym I looked for lactose free protein powder. Soy protein isolate seemed like a good option until I read something about the protein Trypsin Inhibitor (TI). ...
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Nutrient limitation in terrestrial and freshwater ecosystems

In terms of primary production, it is often described in textbooks that nitrogen is the most limiting nutrient in terrestrial ecosystems, while phosphorus is the most limiting nutrient in freshwater ...
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Does the harvesting time of broccoli sprouts change their glucoraphanin content and sulforaphane formation capacity?

Does anybody know if the harvesting time affects glucoraphanin content and sulforaphane formation of broccoli sprouts? Do they also get affected by light exposure or lack of it?
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How do large herbivores get enough protein?

The food they eat seem extremely low on protein. Do they need less protein per mass unit than carnivores? Most of them grow quite a lot in the first year, is most of that from the mothers milk?
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How much myrosinase do mustard sprouts contain?

It is known that ground mustard seeds contain active myrosinase, but what about soaked or sprouted mustard seeds?
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33 views

Why is it (allegedly) dangerous to feed ducks with breadcrumbs and pieces of bread?

I used to go down to the local lake all the time with leftover bread and throw little pieces of it to the hungry duckies, who very eagerly fetched it and ate it while happily quacking away. I thought ...
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84 views

Do humans emit more carbon through respiration or defecation?

Where does most of the carbon we ingest go? I understand that a large amount is exhaled as carbon dioxide, but what percent is defecated (and theoretically deposited in the ground)?
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1answer
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What does a hornet nest foundress feed on?

After wintering, hornet queens will build a new nest from scratch. Once the new workers have hatched, they will fly out and collect carbohydrates to feed themselves and the queen and will also hunt ...
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What vitamins exist for other animals but not humans?

As you probably know, humans are among the minority of animals that require Vitamin C and don't produce it ourselves. For whatever reason (multiple theories exist), we lost the ability. Meanwhile, the ...
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1answer
188 views

Is it possible to use microalgae to produce food and live on it?

I know microalgae have not less protein and starch, grow quickly, require less. So, is it possible to use them for producing food (replace rice and wheat) and live on it? Currently, I only saw people ...
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2answers
125 views

What allows grass eaters to digest cellulose?

Scientists are saying that it was a small step for the Panda to move from a meat diet to a grass diet. The article only refers to differences in the Panda's skull, presumably for better chewing. I've ...
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How do Apes get their Omega 3s in the wild given so few plant sources? Are they able to convert it to DHA?

Given so few plant sources(around 6-7) of ALA, how do Apes get ALA in the wild? Are they able to convert it into DHA in satisfactory amounts?
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Are peanut proteins similar to chicken meat proteins?

I'm studying amino acids content in vegetable food. I was looking at peanut protein and noticed its similarity with chicken meat, as you can see in the table below (quantities are measured in grams). ...
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What kinds of fish tend to have a rapid death after being caught?

I am asking this question because I am trying to make my diet less cruelty-oriented, for this reason this question can be related to trolley problem since I am coping with an ethical problem trying to ...
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Can microbes become “overweight”?

Just out of some weird thoughts, can a microbe (any single-celled organisms, accepting answers for both prokaryotes and eukaryotes) ingest too much food (e.g. via absorbing too much involuntarily ...
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Is brewer's yeast a good source of protein for humans?

I read that brewer's yeast protein is not a "real protein" and is not usable by non-ruminants. Is that true? If yes, how can I know what kind of protein is good for humans (especially athletes)
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Is there evidence to suggest that nutrients in vitamin capsules are not as readily absorbed as the same nutrients in whole foods?

I recently fell ill with a cold, and began to take a vitamin C capsule each day to help my immune system. When I noticed no change in my condition, I began to incorporate an abundance of citrus into ...
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Why are nutrients from food absorbed more efficiently? [duplicate]

It seems to be common knowledge that micronutrients such as vitamins are more easily absorbed by your body when in your diet versus supplements such as pills. I am wondering what the reasons for this ...
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How long do fishes survive in a milk environment?

Suppose you placed a fish, a goldfish for example, into milk instead of water. How long could you expect the fish to survive? Would it die due to lack of oxygen? Is there any other factor that could ...
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349 views

Which white beans have phosphatidylserine?

Many articles online say that plant foods are poor sources of phosphatidylserine, except for white beans, which have 107 mg per 100 g.¹ ² ⁴ Honestly though, I think they might just be repeating a ...
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4answers
135 views

Is there any organism that is born with all the nutrients and resources needed for their entire lifetime?

I understand that adult mayflies have no mouth, but they do take in oxygen through openings in their exoskeleton. Is there any organism that does not need to ingest any type of nutrition and does not ...
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1answer
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Is the salt obtained from meat (as the primary diet) nutritionally sufficient?

This post is derived from that one, where someone says if you meant salt as a nutrient such as carbs, protein and all, there is salt in the stuff one eats already. The background is "Naked and ...
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1answer
139 views

Does body absorb nutrients less efficiently if we ingest the same amount at the same time, opposed to spreading over a larger period?

I would like to understand if ingesting a certain amount of nutrients will result in different absorption from my body, depending on whether I ingest that amount spread over time or everything at once....
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1answer
67 views

Does the arrangement of amino acids in a protein matter for nutrition?

Let's say there are two diets, consisting of entirely different proteins. If you split up all of the proteins from one day of each diet, you'll get the same set of amino acids and the same count of ...
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1answer
315 views

Are casein proteins in UHT milk digestable for infants or toddlers?

As a novice cheesemaker, I have read that Ultra High Temperature prosessed milk is unsuitable for cheesemaking, as casein proteins are denatured and cannot be curdled with rennet. I have verified that ...
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1answer
20k views

Which are mobile and immobile elements in plants?

I am confused with this element or nutrient classification in the plants, since some authors set elements like $\ce{S}$ and $\ce{Ni}$ as mobile and other as immobile elements (Citation 1, 2, 3, 4, 5). ...
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2answers
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Does food lose some of its mass in form of energy during metabolism?

I had an argument with someone. I argued that when a cat eats 1 kg of food, the sum of subsequent output (poo + pee + sweat + change of body mass) must be equal to 1 kg. My opponent argued that the ...
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How can a drink contain 1.8 kcal energy while 0 g fat/carbs/protein?

How is it possible that the Red Bull Zero contains 0 gramms of fat, carbs and protein, but it still has 1.8 kcal of "energy". I always thought that the human body can gain energy only from 3 kinds of ...
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What is the percentage of food that goes to a lamb fetus?

Does any one know the percentage of food eaten by a pregnant ewe that goes to the lamb fetus? Specifically how much does the mother take for her body from every one kilo of food and how much does ...
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1answer
304 views

What is the diet preference of American cockroaches?

I found a research article on the diet preference of German cockroaches. It reveals that those cockroaches prefer to eat bananas most. I wonder if it is the same for American cockroaches. And also, ...
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Why doesn't the soil get depleted after repeated clearing of vegetation?

In my neighborhood, there is a hillside owned and maintained by the local municipality. The hillside is generally overgrown with vegetation. Work crews clear out the vegetation multiple times ...
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Why do we need to diversify our food sources to live healthy, where other animals live happy on one source?

We read about eating different food to get all vitamins and minerals our body need, and often you find people fail to get the daily amount of a certain thing. I wonder why we humans need to do this ...
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2answers
182 views

Why are dietary recommendations for methionine consumption combined with cysteine?

I want to understand the amino acids missing in certain vegetables. I looked up the US recommendations for amino acids (source: wikipedia). I don’t understand why they pair Methionine + Cysteine: 25 ...
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1answer
2k views

Vegetable Cellulose

I'm a pharmacy student working on my thesis. I just want to ask the probable sources of vegetable cellulose found in vegetable capsule? Note: I'm referring to the capsule itself not for its possible ...
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1answer
275 views

Leaves not liked by herbivores

I at times have many goats grazing in our locality. Recently a few cows were seen too. I just offered one of the cows a few leaves from Jasminum sambac plant growing in our garden. The cow smelled and ...
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1answer
213 views

How does a garlic clove thrive inside a closed refrigerator?

A garlic clove has been growing very well inside a closed refrigerator. It has developed beautiful green stalks, which I think are the equivalent of leafs. Since they are green, I assume they ...
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1answer
183 views

Why is exclusive breastfeeding recommended for 6 months only?

The WHO recommends exclusive breastfeeding for the first 6 months of a child's life. Review of evidence has shown that, on a population basis, exclusive breastfeeding for 6 months is the optimal ...
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1answer
569 views

Mites on ginger root

I was just looking at some mouldy ginger found in the fridge under the microscope and was horrified/delighted to find (what looked to be) mites growing in it. I have searched the web and can only find ...
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1answer
49 views

Understanding food composition data from USDA for Vitamin A

When researching the nutritional value of carrots the Vitamin A comes in two measurements as RAE and UI: https://ndb.nal.usda.gov/ndb/foods/show/11124?n1=%7BQv%3D1%7D&fgcd=&man=&lfacet=&...