Belgian Blue bulls look like they are made of muscle because they have a mutation in the gene that codes for the protein myostatin. In humans, as in other types of cattle, myostatin normally limits the number of muscle fibers that form before birth and then limits the growth of those fibers later on.
Credit Courtesy of Se-Jin Lee and Alexandra McPherron / PNAS
Research intended to help people with muscle-wasting diseases could be about to launch a new era in performance-enhancing drugs.
The research has produced several muscle-building drugs now being tested in people with medical problems, including muscular dystrophy, cancer and kidney disease. The drugs all work by blocking a substance called myostatin that the body normally produces to keep muscles from getting too big.
Farmhands at work in Tlaxcala, Mexico. The FDA said Saturday it would step up its surveillance of "green leafy products" from Mexico, after a rare parasite linked to a lettuce supplier there caused illness in more than 400 people in 16 U.S. states.
Credit Jaime Puebla / Associated Press
The FDA said Saturday it would step up its surveillance of "green leafy products" from Mexico, after a rare parasite linked to a lettuce supplier there caused illness in more than 400 people in 16 U.S. states.
The parasite, known as cyclosporiasis, was first identified at Olive Garden and Red Lobster restaurants in Iowa and Nebraska and has since been discovered in Texas and numerous other states.
Originally published on Thu August 8, 2013 3:01 pm
The Food and Drug Administration issued Friday the first legally binding rules for what food companies can legally label "gluten-free."
The rules should help millions of Americans who can't tolerate gluten in their diet.
Gluten is a protein in wheat, barley and rye. Bakers appreciate its gluey texture for making bread. But when people with celiac disease eat it, it causes their immune systems to attack their small intestines.
Originally published on Fri August 2, 2013 11:55 am
Acetaminophen has been added to the list of over-the-counter painkillers that can cause rare but deadly skin reactions.
Credit Paul Sancya / AP
Taking acetaminophen causes rare but potentially deadly skin reactions in some people, the Food and Drug Administration warned Thursday.
The goal is not to scare people off Tylenol and other acetaminophen-based pain relievers, which are among the most popular medications in the United States, federal officials say.
Instead, they want people to be aware that these skin conditions can be a side effect of using acetaminophen, so that if they notice a rash or other skin reaction they can stop taking the drug and quickly get to a doctor.
Free-range chickens feed in a pasture on an organic farm in Illinois.
Credit Seth Perlman / AP
Organic egg farmers are divided in their reaction to a new FDA proposal that's intended to reduce the risk of salmonella infection among free-roaming chickens. They even disagree about what the document, called "Guidance for Industry," actually requires.