Need to lose 70 pounds

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I am 40 and I have been concerned that with being"obese" I may not be around for my children.i take this journey for them. I can be strong at times and very weak at others.i am looking to encourage others as well as get encouragement from others stories of triumph.truth be told-I could easily eat 4000 Cals a day but for 5days I have been at goal