Fist off doctors don't get nutritional training. You shouldn't trust most doctor's opinions on diet:
http://www.nytimes.com/2010/09/16/health/16chen.html" onclick="window.open(this.href);return false;
I've been a natural bodybuilder and martial artist for nearly 40 years. I got into listening to the AMA/AHA dietary guidelines and tried to follow it. Heart disease runs in my family so the topic was important to me, personally. Because the FDA said so, I thought low carb diets were bull. Several years ago, now in my mid 50, I learned (thanks to the internet) that those dietary guidelines for eating low saturated fat was not based upon any biochemistry. Rather, it was based upon epidemiology, aka population statistics. While I think stats are useful guide for health they only give a starting point hypothesis that then needs testing using hard sciences, such as biochemistry.Within days of being accepted into medical school, I started getting asked for medical advice. Even my closest friends, who should have known better, got in on the action...Each and every time someone posed such a query, I became immediately cognizant of one thing: the big blank space in my brain. After all, even with medical school acceptance in hand, I was no more a doctor than they were.....Years later, as a newly minted doctor on the wards seeing real patients, I found myself in the same position. I was still getting a lot of questions about food and diet. And I was still hesitating when answering. I wasn’t sure I knew that much more after medical school than I did before. One day I mentioned this uncomfortable situation to another young doctor. “Just consult the dietitians if you have a problem,” she said after listening to my confession. “They’ll take care of it.” She paused for a moment, looked suspiciously around the nursing station, then leaned over and whispered, “I know we’re supposed to know about nutrition and diet, but none of us really does.
She was right. And nearly 20 years later, she may still be.
Research has increasingly pointed to a link between the nutritional status of Americans and the chronic diseases that plague them. Between the growing list of diet-related diseases and a burgeoning obesity epidemic, the most important public health measure for any of us to take may well be watching what we eat.
But few doctors are prepared to effectively spearhead or even help in those efforts. In the mid-1980s, the National Academy of Sciences published a landmark report highlighting the lack of adequate nutrition education in medical schools; the writers recommended a minimum of 25 hours of nutrition instruction. Now, in a study published this month, it appears that even two and a half decades later a vast majority of medical schools still fail to meet the minimum recommended 25 hours of instruction."
At one time we were told not eat egg yokes because of all the cholesterol in them. Now eggs are fine and good for you. Why? the recommendation not to eat them was based on stats, not human biochemistry.
Well guess what????? Now that there's better biochemistry science, saturated fat no longer causes cardiovascular/heart disease.
http://www.medicalnewstoday.com/articles/267834.php" onclick="window.open(this.href);return false;
That saturated fat no longer is implemented in cardiovascular answered a long bodybuilding question I had. To use some basic numbers:
hang with me on this....Suppose your daily calorie needs to keep weight stable is 2000 calories (BMR) and the doctor instructs you to loose 100lb over the next 350 days. So you cut eating a 1000 calories per day. And lets say you are not eating any fat in your diet...Well guess what? Your body still needs those 2000 calories. But not now those lost 1000 calories are coming from your own stored...saturated fat.
Before you went on your diet maybe you only ate 15% of your calories came from saturated fat. When you go on a diet you daily consumption of saturated fat increases....its just coming from your own stored bodyfat.
If you are hanging with me, here's the point: Whether you eat saturated fat or breaking down your own body's saturated fat it's all the same....It's all entering you arteries as saturated fatty acids. Those 1000 caloies coming from your own stored body fat is the equivalent of eating a stick of butter every day for the next 350 days. If you told your cardiologist you were doing that he'd flip out. The question I had for years/decades was this : If eating saturated fat causes heart disease why doesn't going on a long duration diet also cause heart disease? Why does your cholesterol numbers get better?
The main person who kick started Americans eating a high carb low fat diet was an epidemiologist named Ancel Keys.... and George McGovern " onclick="window.open(this.href);return false;
I can give a lot more links then these explain it well. Maintaining weight is about discipline. It's more about what you eat and not about controlling appetite. :
Gary Taubes is a science journalist who has teamed up with Dr Peter Attia MD.
To prove he isn't some crank MD here's Attia's bio: http://eatingacademy.com/dr-peter-attia" onclick="window.open(this.href);return false;. Attia got his undergrad and masters in engineering. He intended to get his PhD in aerospace engineering but had a change of heart and decided to become an MD. So he spent the next year teaching college calculus and working on his prerequisites for med school. He then enrolled in Stanford Medical School and did his residency in general surgery at Johns Hopkins.
Attia would exercise 3 hours every day. He's an ultra-marathon swimmer and long distance bicycler. He swam the Catalina Channel twice (a distance of 25 miles) and he was the first person to swim the Maui Channel over and back. Even though he was exercising that much he still got over weight.
These links are talks they gave, Attia followed Taubes. Taubes gives the history and bad science that went into the dietary guidelines, and, using some high tech biochemistry experiments, Attia shows how his blood work improved eating a 4000 calorie diet that was 80% fat.
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Dr. Peter Attia MD
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Published in May 2015
Paleolithic nutrition improves plasma lipid concentrations of hypercholesterolemic adults to a greater extent than traditional heart-healthy dietary recommendations.
http://www.ncbi.nlm.nih.gov/pubmed/26003334" onclick="window.open(this.href);return false;
Recent research suggests that traditional grain-based heart-healthy diet recommendations, which replace dietary saturated fat with carbohydrate and reduce total fat intake, may result in unfavorable plasma lipid ratios, with reduced high-density lipoprotein (HDL) and an elevation of low-density lipoprotein (LDL) and triacylglycerols (TG). The current study tested the hypothesis that a grain-free Paleolithic diet would induce weight loss and improve plasma total cholesterol, HDL, LDL, and TG concentrations in nondiabetic adults with hyperlipidemia to a greater extent than a grain-based heart-healthy diet, based on the recommendations of the American Heart Association. Twenty volunteers (10 male and 10 female) aged 40 to 62 years were selected based on diagnosis of hypercholesterolemia. Volunteers were not taking any cholesterol-lowering medications and adhered to a traditional heart-healthy diet for 4 months, followed by a Paleolithic diet for 4 months. Regression analysis was used to determine whether change in body weight contributed to observed changes in plasma lipid concentrations. Differences in dietary intakes and plasma lipid measures were assessed using repeated-measures analysis of variance. Four months of Paleolithic nutrition significantly lowered (P < .001) mean total cholesterol, LDL, and TG and increased (P < .001) HDL, independent of changes in body weight, relative to both baseline and the traditional heart-healthy diet. Paleolithic nutrition offers promising potential for nutritional management of hyperlipidemia in adults whose lipid profiles have not improved after following more traditional heart-healthy dietary recommendations.
Copyright © 2015 Elsevier Inc. All rights reserved.
University of California:
The Skinny on Obesity - UCTV Prime (Metabolic Syndrome)
http://www.uctv.tv/skinny-on-obesity/" onclick="window.open(this.href);return false;