Any substance consumed to provide nutritional support for the body.

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What makes certain obligate anaerobes viable in fermentation starter cultures?

If Propionibacterium are obligate anaerobes (to wit, poisoned by oxygen), what makes 'Dairy' or classical propionibacteria (e.g. P. shermanii, P. jensenii, P. acidicpropionici, et al) viable in ...
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2answers
309 views

What happens to lactic acid I eat?

Let's say I drink some Kefir Milk, what happens to the lactic acid in the Kefir Milk that has entered my digestive system?
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1answer
93 views

Are there any air-plants with parts that are edible for humans?

Are any air plants (Tillansia sp.) safe for humans to eat? I haven't been able to find whether or not there are. Pineapple is in the same family (Bromeliaceae), but isn't an air plant.
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2answers
640 views

Why aren't we allowed to refreeze previously thawed breastmilk in refrigerator?

https://www.breastfeeding.asn.au/bf-info/breastfeeding-and-work/expressing-and-storing-breastmilk Previously frozen— thawed in refrigerator but not warmed 4 hours or less (ie the next ...
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2answers
1k views

Why do kefir grains stop growing in soy milk?

Kefir is a fermented milk drink made with kefir grains. It usually is prepared by inoculating cow, goat or sheep milk with kefir grains. I would like to prepare the drink with soy milk, which worked ...
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2answers
5k views

Does sour food cause sweating?

While eating sour food or candy, I start to sweat if it's sour enough. My body feels much hotter although my actual temperature is the same, my forehead starts sweating a lot and I feel like it just ...
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0answers
45 views

Why does pasta really boil over? [migrated]

I was making pasta, and I noticed the pasta boiling over. I thought about it some more, and I realized I had no idea why this was happening. When the lid is on, the foam rises. When the lid is off, ...
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4answers
3k views

What nutrients can humans absorb in the mouth?

For instance, I realise being able to absorb simple sugars in the mouth is pivotal in the rapid action of oral glucose gel. Thus I was wondering what nutrients in general can be absorbed directly ...
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1answer
62 views

Will a garter snake eat unusual prey if made to smell like something normal?

I have noticed that my garter snake only eats after it has smelled it's prey to make sure it is a slug, and it doesn't matter whether it's moving or not. If I were to coat, say, a caterpillar with ...
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1answer
45 views

Does tea have its effect if you have a sleep after drinking it?

If I drink tea, then go to sleep for a while, when I wake up, will the effect of tea still be on me (the refreshing effect)? Does it depend on the duration of sleep?
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2answers
80 views

Is there a biological reason for spreading food intake into breakfast-lunch-dinner?

I keep hearing over an over how humans can satisfy their entire daily caloric need in one sitting at a fast food restaurant. At the same time I'm looking at the kitchen plates, cups, etc, and they ...
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3answers
2k views

What's the worst that can happen from eating too many spicy peppers? Can you die?

Some peppers, such as the habanero or Carolina reaper are extremely spicy, and when eaten in larger amounts than one is accustomed to, can cause some discomfort. I've also heard anecdotes claiming ...
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42 views

Blood consumption

Is consumption of blood more "dangerous" compared to meat? There was a news-article about unnatural chemicals found in the blood of mothers. This reminded me about a question I have pondered upon ...
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1answer
35 views

What is the evolutionary reason behind human preference for salty foods?

It's been established that food palatability is related to it's caloric density. This hypothesis is used to explain why humans are partial to sugar and fat. But it is also said that humans are partial ...
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1answer
34 views

Can an insect poison itself with food?

Is it possible that an insect poisons itself while eating "wrong" plants/fruits/... and have symptoms like pain (may hard to measure or detect) or orientation disorder? Background: I observed a ...
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2answers
73 views

Detecting food fraud

There's undoubtedly more than one way to do this, but if a DIY biologist were to attempt to detect food fraud (e.g. as done by students from Stanford University and Trinity School, Manhattan with ...
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2answers
156 views

How can toddlers expend seemingly boundless energy when they eat so little?

A toddler's food intake seems very little: only milk and water and some solid food. Therefore, from where does this energy come?
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1answer
36 views

How are oranges in the US or anywhere made seedless?

How are oranges in the US or anywhere made seedless? Please explain the broad principles and not the technicalities.
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1answer
12k views

How to store vegetables in the refrigerator: In plastic bags or not?

My wife and I are having a debate similar to this one: I claim that it's better to take the fresh veggies out of the bags and put them in the crisper with humidity control because: That's what the ...
3
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0answers
20 views

How is nutrient uptake in humans measured?

There are many claims made about nutrient absorption, eg "Juicing helps you absorb all the nutrients from the vegetables". I'm curious to know how nutrient uptake is measured. Eg is it a pure ...
6
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1answer
140 views

What exactly makes bananas go brown?

I know that often oxidation processes are mentioned when referring to the color change from yellow to brown in bananas (specifically: those that you get everywhere in supermarkets, with no seeds). ...
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0answers
42 views

Book recommendation on selective breeding?

I am looking for a good book that gives a nice overview of the science and technics of selective breeding. I am particularly interested in the use of population genetics to support decision in this ...
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1answer
56 views

Is Schoons Hard Shell muskmelon a hybrid?

Would Schoon's Hard Shell muskmelon be considered a hybrid as I have read it was a cross between a Bender's Surprise and a Honey Rock.
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1answer
103 views

Why does ear wax taste sour?

Why does ear wax taste sour? I am interested in both the physiochemical mechanisms and the evolutionary reasons behind the sour taste of earwax.
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1answer
45 views

Does the lung absorb organic food?

Imagine you swallow something up and not everything gets out of the windpipe (this is possible right?). Would it be possible for the lung to handle with the rest implying that it is organic? Would it ...
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4answers
4k views

Can humans eat grass?

Can a human eat grass and digest it? Could it be possible to use it as food just like other plants such as wheat or beans?
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4answers
637 views

Has there ever been an attempt to create nutritionally tailored food for adult human consumption?

For all domestic animals, and for all animals kept in laboratory, complete and precise composition of perfect food is figured out (cat food, dog food, cattle, rats, laboratory monkeys and apes) -- ...
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0answers
26 views

The biological basis of inflamatory foods: the list of attributes and the concrete example of milk vs kefir

I wonder if anyone has some interesting matterial on the biological basis of inflamatory foods. I'm interested in pin-pointing the (in)complete set of (known) causes in the form of a list and maybe ...
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0answers
43 views

What are current abiogenesis hypotheses for first food source?

What is the very first abiogenetic piece of reproducing life (small piece of RNA + ribosome that randomly occurred?) hypothesized to have used as an energy source? I'd be interested in sources to what ...
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2answers
274 views

What are the evolutionary niches differentiating an apple from a pear?

So, as far as I understand (basic) evolutionary theories, diversity is generated by "niching." That is, if there is an environmental factor that hasn't been fully used by any species to "profit" off, ...
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1answer
39 views

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

i got know microalgea can benifit a lot and it has not less protein and starch , and grows quickly, require less so is it possible to use them for producing food (replace rice and wheat) and live on ...
0
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1answer
82 views

Does avocado and orange have a common ancestor?

While I'm eating my orange, I felt as if I was eating avocado. It might be genetic manipulations perhaps but it made me think if they have a common evolutionary ancestor. Is there?
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0answers
34 views

Can juice become sweeter after packaging?

It seems like the orange juice thats been sitting in the fridge for awhile always tastes sweeter than the juice just brought from the grocery store. Can juice ripen in the container ?
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0answers
51 views

Why do animals only eat some parts of their food?

For example monkeys/apes only eat part of a fruit and then throw the rest. Cats (big and small species) only eat some parts of their prey and then they abandon it. Humans on the contrary leave as few ...
3
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1answer
95 views

Does the body lose energy or gain energy relatively when drinking or eating hot things?

Does the body lose or gain energy when drinking or eating hot things compared to more neutral temperature things? On the one hand, The body could somehow convert the heat energy into human usable ...
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2answers
49 views

3 fates of this matter

When an animal eats something, it obtains matter and energy right? But, what are the 3 possible fates of the matter and 3 possible fates energy. I don't understand what they are even asking. What ...
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1answer
127 views

Eating rarely but a lot, or often but little

I wonder if it matters if an average person eats the same amount of food distributed between a few (2-3) meals during the day, or constantly having small snacks. I'm interested in several aspects of ...
1
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1answer
108 views

Does animal fat and meat contributes differently to our body?

Is animal fat harmful to our body or is it harmful if the amount eaten exceeds a certain amount? I have heard fat is more concentrated than protein. If I am correct then we can get more energy from ...
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1answer
291 views

What should be evaluated in food decomposition experiment?

Briefing Some days ago I noted that 3 cookies left on my desk since 3 months ago are still "fresh", and by that I mean... not spongy like some cookies that get soft after some time outside. However ...
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1answer
238 views

How many honeybees are there, and how has the number changed across time?

How would you begin to estimate the world population of the European Honeybee (Apis mellifera)? Would recent colony collapse disorder show up as a blip? How about the spread of A. mellifera from ...
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0answers
54 views

Biological/molecular basis of nutritional need differences between blood types?

There are many nutrition books and websites (like http://www.aqua4balance.com/Healthy-Diet/blood-type-nutrition-educational-workshop.html) that assign very different nutritional needs to individuals ...
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1answer
68 views

Is iodised salt harmful to the lactofermentation process?

I was discussing sauerkraut recipes with someone on IRC a minute ago, and they warned me not to use iodised salt in the process. My first (and so far, the only successful) batch is one I made with ...
3
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1answer
148 views

Why does the stomach ache if you take a brisk walk after lunch or dinner

After eating your lunch or dinner, if you take a brisk walk, most of the time your stomach aches. Why does that happen? What happens with respect to the body metabolism?
2
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2answers
112 views

Lactose Intolerance

What nutrition is given to infants who are lactose intolerant? I understand, in today's day and that age we have non-lactose formula milk, but what happened, before lactose-free milk was created, to ...
3
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0answers
75 views

What are the physiological effects of wine?

I have read that alcohol in general and wine in particular can have advantageous as well as detrimental effects on human health. Is this true? What are the physiological effects of consuming wine in ...
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1answer
3k views

White eggs can be considered as non-vegetarian?

I am basically a vegetarian and I find it very difficult to get an actual biological answer for this question on search engine. There are couple of links which discuss these argument but can not be ...
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1answer
68 views

Botulinum Toxin

I asked on the cooking site, but was directed here. This is my original question http://cooking.stackexchange.com/questions/35726/botulinum-toxin-in-home-canned-green-beans The reading is quite ...
5
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1answer
409 views

Why does ostrich meat look and taste more like beef than chicken?

Some time ago I tasted ostrich meat, and what was amazing to me was that the meat very much resembled beef, much more than it resembled chicken, turkey or duck meat. And even more than lamb and pork ...
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2answers
68 views

Why might food spoil faster in Ireland than the US?

An American is staying in my house for the summer and claims that food (specifically, bread and milk) spoils a lot faster here than at home in California. Is there a significant difference in chemical ...
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72 views

Should pasteurised milk go bitter instead of sour when it is close to its expiration date? [closed]

I bought some milk today on a special offer, its expiration date being tomorrow, and after leaving it outside, in one of the still-sealed boxes, for a few hours, the milk went bitter. But milk ...