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According to this entry in the Swedish wiki, flour made out of pine bark contains about 82kcal/100g. This flour is not made of the bark itself, but the thin layer between the bark and the wood. It is harvested in the spring when rising sap makes it come of rather easily. To make it into flour you have to dry it, roast it and then you sift it and presto. You ...


2

Most probably the numbers were typo. There are numerous websites on pine tree bark eating. So far the best I found is this one from Survival Topics. I agree with the statement, this option should be an emergency option. The 2500 kcal requirement is more than the actual minimal need of energy per day. More like 1700-1800 given by the numbers of FAO research. ...



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