Is Losing Weight Healthy?

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When it comes down to losing weight,there are generally two aspects involved: health and appearance. Many people assume that skinny is what is healthy and that being anything other than skinny is unhealthy. Not only is this not the case, but also being skinny can actually be quite unhealthy-depending on the person and the diet. There is nothing particularly green about an unbalanced diet or starvation. There's nothing green about not exercising at all or using chemicals to replace meals. As crazy as all of these things may sound, they are still very common conditions for those aiming to lose weight; desperately doing whatever it takes.
So the question I ask of you today is this: do you really need to lose weight? Are you thinking about your health or are you thinking about your appearance? A good way to know for sure is to answer this question:
Would you go to unhealthy extremes in order to lose weight?
If the answer is yes, then you can know for sure that you're concerning yourself with appearance and not health. If this is you, start over fresh. Start thinking about your health instead of the way people on magazine covers look. There's no sense in greening up every aspect of your life around you if you can't make sure that you are totally healthy first...and that may not require losing weight.

http://health.howstuffworks.com/wellness/diet-fitness/weight-loss/losing-weight-healthy.htm