whats better for weight loss

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So looking for opinion or feelings what's better for weight loss low calories low carb high protein diet or low carb high protein minimum weight required calories some have told me eat less calories and higher protein were others are eat what is required in calories low low carbs and high protein .The reason o ask is I started doing insanity and get a lot of walking and lifting thru out the day, the books say for my calories burned I should be eating at least 600 calories each time I eat ,that seems way to much .I've checked out other calculators and get different reviews Please help any light shed on this would be much appreciated

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