Doctor insights on:
Is Obesity Caused By Genetics Or Environment
Could be.: Genetics can sometimes hard-wire an individual to be prone towards obesity, or at least overweight. These people will have a harder time losing weight and staying trim. Outside of genetics, we contribute to obesity in ourselves by limiting exercise and eating foods with high caloric densities and high fat contents. ...Read more
The definition started with Louis Israel Dublin, chief statistician of the Metropolitan life insurance company, in the early 1940s, as a BMI >25 (definitely >30) for people in their 20's based on retrospective observational life insurance data of the age at which people died later in life. This was subsequently adopted by the medical disease industry. However, BMI is ...Read more
Mostly complicated: There are known genetic causes of childhood obesity. One is prader-willi syndrome, which is rare but causes morbid obesity in childhood. Even more rare is leptin deficiency. There are other rare causes, often associated with other conditions. Most obesity is "polygenic", meaning multiple genes affect the trait, which makes it hard to pinpoint the precise cause. ...Read more
Has a genetic cause for obesity been found, that would make one obese even if eating a typical number of daily calories?
Genes and obesity: There are 70 different genes that predispose for obesity. Some influence where fat is stored, some influence hunger, some cause binge eating, and many influence metabolism. For our bariatric patients we are finding that they burn about 8 cal per pound. That's 1600 cal per day if they weigh 200lb. For genetically thin patients, they burn 13-14 cal per pound. That person could eat 2600 cal per day. ...Read more
Lots: There are many things that can cause weight gain. These include: 1. Cushing's syndrome 2. Hypothyroidism 3. Depression 4. Drugs for depression like tricyclics, valproic acid, risperidone, lithium. 5. Drugs for diabetes like insulin, sulfonureas 6. Sedatives and pain killers 7. Prednisone and other steroids 8. Antihistamines 9. Beta-blockers. ...Read more
Only a little: Prior to 1979, pediatric overweight/obesity was at a flat rate of about 5% in the U.S. It had been at 5% since the records were first kept, beginning in the 1950's. Starting in 1980 there has been an increase every year, and we are now near 20%. So it appears that about 5% of kids will be overweight/obese and part of that is genetic. The rest is related to our lifestyle in this country. ...Read more
I notice that more & more folks have diabetes. Is that mostly due to genetic defects, besides food, milieux, obesity, among other things?
Obesity is Genetic: Obesity clearly "runs in families". This is apparent by simply observing body appearances among parent and child. Now, we have found over 80 different genes that are preferentially found in obese individuals. The genes influence the metabolic rate (how many calories you burn), hunger hormone levels, fatty deposit tendencies, and many others. Identical twin studies also support a gene answer. ...Read moreSee 2 more doctor answers
Reduce weight: Having a genetic predisposition to obesity just means you'll have to work a little harder. Start by changing your lifestyle to a healthier one. You don't need a drastic diet. Make small changes. Eat the right portions, eat 3-5 small meals a day, cut back on carbs and sugars, increase lean protein/veggie/fruit/water intake, and start doing cardiovascular exercise routinely. ...Read more
Multiple factors: Diet, exercise, positive self image. Cross train 3-4 times a week for 40 minutes-1hour. Eat 6-8 small fist sized portions of high protein , low carb, low salt food and drink 8-10 glasses of water daily, Have a photo of yourself or someone you would like to look like on your dressing room mirror and look at it daily. This will take 2-3 months before results are noted. ...Read moreSee 2 more doctor answers
Does genetic testing actually help people with weight loss? If so who should use it? Should I use it since I'm morbidly obese?
Obesity: Please see your Primary doctor and get a referral to a nurse who will get you started on weight loss. Don't overdo it! ...Read more
From a medical standpoint, "genetic" refers to the potential heritability of various medical conditions. While some conditions are inevitable (at some point in one's life) as a consequence of simple genetic heritability (eg huntington's disease), a large number of medical conditions (including all behaviorial health disorders) are the expressed final pathway of a ...Read more
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