Jason Block Profile picture
Obesity and nutrition researcher at Harvard Med and HPHC, general internist. Tweets are my views on nutrition & obesity prevention policies/programs.
Sep 12, 2022 14 tweets 9 min read
Since 2018, #calorie labeling of prepared foods has been required in food retail establishments (became law with 2010 ACA). Our team has been evaluating the effect of this law in restaurants & supermarkets, funded by @niddk. What have we found so far? A thread, 1/14 Most complied: 71 of 90 (79%) of the largest restaurant chains & 9 of 10 of the largest supermarket chains by the end of 2017 & 186 of 197 (94%) of the largest restaurant chains by the end of 2018. Work led by @parksasaurus. 2/14 pubmed.ncbi.nlm.nih.gov/29927646/ & pubmed.ncbi.nlm.nih.gov/32313679/
Mar 22, 2020 4 tweets 1 min read
People who are asymptomatic SHOULD NOT be tested for #COVID19. Diagnostic testing properties are very poor when pretest probability is low. People who are asymptomatic with + tests are much more likely to have a false + than a true one. Negative test may give false reassurance. Politicians and celebrities being tested while asymptomatic is not helpful and will lead to a higher unnecessary demand for testing.