blackstock joins us now.a calculation that uses both weight and height to determine if someone is a normal weight or overweight or oh obees. now we see that it's not perfect. it's helpful because it gives you a sense of the person's risk for diabetes or heart disease or stroke but it can underestimate obesity and it cannot tell you how fat is distributed on a patient. >> why is that important the distribution of fat? >> right, so, what we know now that fat that's distributed around the waist, the apple shape that's more likely to be associated with metabolic syndrome, a series of conditions associated with diabetes, heart disease as well as stroke. okay, so, that's what -- that apple shape we know is more associated with men, not only in men but that apple shape that's more dangerous fat. >> that pear shape that we were showing is better? >> that pear shape is less associated with the metabolic syndrome, when you have the pear shape the fat is distributed more around the thighs, the buttocks and the hips. the

blackstock, thanks so much for joining us.ng you, but what are some of red flags to watch out for here. >> the red flags, if you get interrupted multiple times while trying to tell your doctor what the issue, if you get ignored or dismissed or talked over, they try to persuade you that it's something else sometimes it's something else. sometimes we're so stressed that we're telling -- all right the statistics are interesting on this, young millennial women, 59% reported they had sought treatment from a doctor who did not believe them. that's a staggering number. >> it really is. we see a lot of gender bias in the data and even among lgbtq people and young people and people of color coming in, it make time for an accurate diagnosis. >> so, the major question here, sorry, is how can patients advocate for themselves? >> advocacy is super important coming in with a clear idea of what is your chief complaint? how long have the symptoms been, what's the duration? write that all down. ask questions, have the questions listed. just as