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102

There are several reasons why I think rationing is useful. Morale - If you eat all your food on the first day you won't have anything to look forward to. If you eat a little bit twice a day you can look forward to your next morsel instead of regretting eating all your food. Meals become a break in the monotony and something pleasant you know will be coming. ...


86

Just because there are grasses (Poaceae) with edible and nutritious parts does not mean that this applies to all grasses. That is pretty common-place. A quick Google search give you all the info you need: Many grasses are edible, in the sense that you can eat it; you simply won't get any energy/nutrients out of it. They consist mostly of cellulose, and ...


72

From a thermodynamics point of view, I'd say you should leave the water in. Temperature is a measure of the active kinetic energy of the molecules in a substance. Warming up is essentially the surrounding environment imparting some of its kinetic energy into the object being warmed up. Simply thinking about that, the more you have that needs warming, the ...


71

Dehydrated food is key. Water weighs a LOT. Breakfast -- Any variation on oatmeal. You can make your own or buy prepackaged meals. Lunch -- Peanut butter on hard tack. (did i mention water?) Dinner -- Any dehydrated meal will do. I've used both Mountain House and Backpackers pantry. Snacks -- I prefer Clif bars and Justin Nut Butter for a good weight/...


52

Aside from the previously mentioned micronutrients, your body doesn’t really store protein in any significant way, so in order to ‘repair’ your body you need a relatively constant stream of protein (or rather, amino-acids). Nothing bad happens if you fast for a short while, but it does mean you will obtain amino acids from breaking down your own muscle which ...


51

To remedy the lack of sources (and hard numbers), I've started to write down here (for easier references) what is given for caloric values here: USDA Food Composition Databases. Feel free to contribute. ALL CALORIC VALUES LISTED BELOW ARE IN KCALS FOR 100 GRAMS OF THE PRODUCT. Pâté Fish in tin cans (+) practically never spoils (+) can be warmed on the ...


49

Short answer: A cooler containing more ice and less frozen food will last longer than a cooler containing all frozen food. With frozen contents of a given mass, the length of time a cooler will stay cold is proportional to the latent heat of fusion of the contents. The latent heat of fusion of water ice is 334 joules per gram. ASHRAE (the American Society ...


48

We (Kent and Deny) did an experiment in order to shed some light on this debate. We found that keeping the water in the cooler along with the ice kept the overall temperature of the cooler below 5 degrees Celsius for approximately 4 hours longer than when the water was removed. Experiment. We filled a Coleman cooler with 12 341mL bottles of Waterloo Dark ...


46

Couple of ways to do this, Powdered milk, has a shelf life of over a year and just needs water added to it. Evaporated milk, milk with over 60% of the water removed before being canned. Sweetened condensed milk, basically the same as the above just with lots of sugar added. Powdered milk is the lightest and can be made in small batches while the others ...


46

One solution to your problem is UHT (ultra-high-temperature) milk. UHT milk has been treated at a high temperature to kill all bacteria, making it shelf-stable for at least 6 months. Once opened, however, UHT milk needs to be refrigerated just like normal milk. If you're used to the taste of pasteurized/homogenized milk, UHT milk tastes a little different --...


44

The conclusion is not correct. Some bacteria produce toxins which are not destroyed by heat, for example Staphylococcus. See this link for more information. Note that this is not strictly an outdoors issue. Even at home, you should not keep fresh meat in your fridge too long before cooking it, as it gives time for bacteria to produce toxins. The ...


41

Lots of people have posted answers saying what they like to eat. However, the OP asked a very specific question, which was: "What is the most efficient food to take a for a 12-15 day hiking trip? [...] Assume I have no taste at all and don't care about eating the same tasteless thing every day if necessary." She specifically stated that her only criterion ...


34

As a former soldier (and Medic), I personally don't flavour my water during the outdoors. The contents of the canteen/flask might be required for a non-drinking purpose such as: Eyewash Rinsing Medical Cleaning etc However, I do flavour my water on a day-to-day basis for the gym etc using super-concentrate micro capsules such as Squash'd If you have ...


33

The term you're looking for is "low-residue diet" or "low-residue meal" (for some reason, the medical community tends to avoid the term "poop" in their technical terminology). Simply googling on those terms will get you a lot of good advice; WebMD and Wikipedia are good starting points. A low residue diet is a diet designed to reduce the frequency and ...


31

Rice. If you have fresh (or purified) water, an amazingly small amount of rice would suffice for 14 days. I've trekked the Cordillera Real for 12 days, and rice was the only reasonable option in terms of weight. A small set of spices - especially salt and pepper - dramatically improves its taste. If you don't want to eat the same food for 14 days, take ...


31

There are many nutrients that your body cannot store, or not in decent extra amounts. Water, salt, potassium, vitamin C, etc. You will rapidly excrete these, and then greatly feel the lack of them when you are fasting for days. Yes, you can to some extent gorge yourself on macronutrients (fat, carbs, protein) because these will be stored as body fat ...


30

Here in Slovenia, the use of wild garlic is quite widespread. Although the whole plant, including bulbs, is edible, leaves are most commonly used. I tried only leaves so far, so I can share my experience with only them. Gathering Young, light-green leaves are a bit more aromatic, but smaller; older are darker and larger. I pick a mix of both and look for ...


30

If you look for the manufacturer's promises for these "passive" boxes (there is absolutely no cooling, just the attempt to keep the cool in - called isolation), they usually state something around 24h to keep things cool. You don't even have to start thinking how the manufacturer got to this number. There is no way to use it in the way you proposed because ...


29

Your body just doesn't have a reaction on skin contact right now. However most people will develop a reaction after enough repeated exposure. While poison ivy doesn't bother me either, I do take basic precautions to not push my luck. With regular contact, you will develop an allergy, and though it could take years, it will take a lot less if you start ...


29

Basically tin foil is your friend! Even though you could also place some of these foods directly on the embers, if you're willing to carry some tin foil and do a little bit of preparation, you can create some awesome meals on a campfire. Potatoes Image by Ryan Dickey Slice them open unpeeled and fill them with cream cheese Season with salt, chives, ...


29

The simple answer is that yes it does make sense to ration, see the stories of the men who survived the Essex or the Mutiny on the Bounty or the Chilean Miners or many countries during wartime. From a mathematic point of view, one rations when does not have enough food for the timeframe between now and a resupply. If you eat enough to be full all the time, ...


27

The best advice is not to unless you are very, very sure. Having said that, and just for fun, assuming you are in a chronic survival situation with no choice, this article describes how to test if a plant is edible.


26

The rule of three may be a useful mnemonic to help prioritise or plan in a survival situation, but it is not necessarily going to be accurate. Survival without food is going to depend on many factors, for example, the nutritional state of the person at the start of their starvation and the amount of energy they expend during the starvation. These factors ...


26

Cheese: Long time. Especially hard cheeses. You can just cut any mold off the edge that might creep up. Cheeses sealed in cheese wax (gouda) are a good bet. I've had extra-sharp cheddar un-refrigerated in the AZ desert for 8+ days, in the rocky mountains for 15+ days with no issues (aside from sweat.) Blocks last longer than a pile of shredded cheese. Be ...


26

Avoid Putting cheese in plastic bags. Ever. Mold guaranteed. The cheese should receive enough air and shouldn't get wet. Cutting a big piece into smaller pieces (for easier service, you know). First, you break the wax or vacuum bag, second, now you have much more surface and much more to cut if mold happens. Best practices If you can, prefer cheese sealed ...


26

What I've always understood to be the rationale, and doesn't seem to be directly addressed with the other answers, is that the human body adjusts its metabolism to its resources. If you gorge on all your food, you're signalling to your body that there's plenty of food. If you eat only a little bit a day, you signal to your body that it should go into ...


25

Eating grass isn't smart because our bodies lack the enzymes to digest it, and because you never know if some animal came along and crapped on it. Don't eat grass.


24

Eating berries and mushrooms is not recommended since there is no general pattern to identify poisonous ones (unless you're an expert on that topic). Even having a book with pictures of edible berries can be tricky as some poisonous ones are disguised as their edible counterparts. Plants, on the other hand, should not be edible if the sap is milky. Milky ...


24

I am pretty certain that this is what you are looking for, Image Source Two tablespoons (32g) of the stuff has 8g of protein and 16g of fat. Source It easy to carry, does not require refrigeration or cooking. Typically I eat it straight out of the jar with a spoon and can go through one of the jars pictured in about a week. Yes, it does get old after a ...


24

Theoretically, it might be possible to survive on fish, rainwater and desalinated seawater. In one 1930 experiment, two men survived for a year eating exclusively meat without experiencing any health issues. This indirectly suggests that meat (and therefore possibly also fish) contain all the essential nutrients, but this was a small and relatively short ...


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