What are the effects of not having enough body fat?

I am 18 and have 2% body fat, I have been feeling unhealthy lately. I am always cold even if it is in the sixties outside, I have very low energy and even my brain function does not seem as good (slower in the head basically). is 2% body fat unhealthy?
I measured my body fat using body fat measurement calipers.

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What are the consequences of not having enough body fat?

Im 16 and have 5% body fat. My nutristionist tells me it needs to be higher so im working on it. Anyhow, what are the consequences of having less body fat % that the recommened amount?
HAHA! theres the mystery, as a matter of fact, i was kinda fat a year ago now im a bit too skinny, so i have to gain a few pounds and some body fat.

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What does having 9 percent body fat really mean?

I weight around 135 pounds, and lift some weights often, but my diet isn’t really that great. I don’t eat junk food at all, but I eat a lot of bacon (everyday) and other meats and products that I know are a bit high on fat. What does this say about my body?
(my body is 9 percent body fat)

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How To Check Your Body Fat Without Having To Visit The Doctor?

Can anybody help me with this? I exercise and would like to see how much body fat I am losing, but I don’t know how to w/o going to a doctor.

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