by drinking coffee peopleevelop aolerance to caffeine. risk of developing higher blood pressure. two cups a day,ive coffee drinking is defined as five to six cups and that could increase your chance of heart problems. >>> women who use atks style diets t lose weight may be at greater risk of cardiovascular diseas a study followed 43,000 women. 28% increase in the number of cardiovascular cases. the potential harm from these diets out weighs the benefits of the weight loss. >>> health regulators are taking a closer look at metal hip replacements. in about 6% of the patients the implants had to be replaced in fewer than 5 years. >>> you want to be sure to check back in with wjz eyewitness news today at 4:00, 5:00 and 6:00. the latest on the fear and the run away wild fires in colorado. wjz is closely monitoring the sentencing hearing for a local neighborhood watch volunteer convicted in the beating of a teenager. join us for these stories today at 4:00, right after dr. phil. >>> stay with us, your five day forecast is next. [ male announcer ] eligible for medicare? that's a good th