56 votes
Accepted

Do people carry around up to 20 lbs (9 kg) of poop?

No. According to the chapter "Carbohydrate Metabolism in the Colon" in Human Colonic Bacteria (1995) : The large intestine contains about 220 g wet weight of contents (range circa 60–900 g),...
DavePhD's user avatar
  • 107k
36 votes

Do people carry around up to 20 lbs (9 kg) of poop?

Those Ads were popular on TV years ago. They all claim some permanent build-up of "extra poop" which only a cleanse can remove. I found a lovely 2018 quote from a skeptic medical office of ...
Owen Reynolds's user avatar
11 votes

Can a person lose weight by being cold?

Energy metabolism in humans at a lowered ambient temperature European Journal of Clinical Nutrition April 2002, Volume 56, pages 288-296 does confirm that men dressed identically at 16 degrees C do ...
DavePhD's user avatar
  • 107k
8 votes

Are slow metabolisms to blame for obesity?

Excluding rare and serious metabolic conditions, which should be diagnosed by a doctor, people's metabolisms tend to be within 200-300 calories of each other. This examine.com meta-analysis explains ...
John's user avatar
  • 195
8 votes

Do fitness trackers make you fatter?

No. Using a tracker does not make you fatter, and that is not what this study claims. Lets start with the participants: Among young adults with a BMI between 25 and less than 40 (so no already ...
Ryan's user avatar
  • 865
7 votes
Accepted

Did Kali Muscle weigh 99 pounds when he was 16 years old?

Chuck "Kali Muscle" Kirkendall, Jr. writes in XCON TO ICON - The Kali Muscle Story [referring to the summer before his first year of high school, 9th grade, at Castlemont High School] Luckly I made ...
DavePhD's user avatar
  • 107k
7 votes

Can a person lose weight by being cold?

Dave already provided the scientific source that does confirm that men use up more energy when staying in a colder environment. Nevertheless, your question puts this question into the specific ...
James Cameron's user avatar
5 votes

Can the human body significantly build muscle while losing body fat?

It's completely commonplace to increase muscle mass while reducing body fat. It's trivial to find 1000s of articles and papers on this, random examples https://health.usnews.com/wellness/fitness/...
Fattie's user avatar
  • 270
3 votes

Are slow metabolisms to blame for obesity?

No. It can be argued from an evolutionary standpoint that there shouldn't be much difference in metabolism rate among humans. (Except rare diseases). Because over an evolutionary scale, humans nearly ...
Scrontch's user avatar
  • 136
2 votes

Does eating slower make you lose weight?

The mechanism behind the "eating slower" claim is because of hunger. Whether one is hungry or satiated/full is communicated through the endocrine system, not directly through signals in the ...
PoloHoleSet's user avatar
  • 9,668
2 votes

Do saunas affect your health?

There is some evidence that saunas provide a health benefit. This systematic review of 13 randomized control trials found most studies reported health benefits . This review of evidence states: ...
Lukas Halim's user avatar
2 votes

Can the human body significantly build muscle while losing body fat?

The solution of the apparent contradiction may be in the scales of time: At any point in time, you can either slim down (catabolic, during excercise) or build muscle (anabolic, during rest after ...
cbeleites unhappy with SX's user avatar
1 vote

Can the human body significantly build muscle while losing body fat?

Yes. That's the normal state for beginners with more than enough body fat and no physical excercise. Yes, different people get different tips on how to improve, it totally depends on your current ...
Syren Baran's user avatar
1 vote

Do fitness trackers make you fatter?

"The idea of using a fitness tracker is that you should pay more attention to the amount of exercise you get and, therefore, be more likely to get enough. This should support weight loss in people who ...
JohnM's user avatar
  • 19

Only top scored, non community-wiki answers of a minimum length are eligible