Browse evidence-based analysis of health-related claims and assertions
Log in to see full claim details, scientific mechanisms, and cited studies.
After getting an mRNA vaccine, some people who feel totally fine might still show signs of heart inflammation or changes in heart metabolism on a special scan — and those signs could last up to six...
The spike protein from the vaccine has special building blocks (proline) that make it harder for the body to break down, so it might stick around longer.
Getting an mRNA vaccine with a special chemical tweak might accidentally make your cells produce weird proteins that could confuse your immune system and possibly lead to autoimmune problems — in...
The spike protein made by the body after an mRNA vaccine might stay in the blood for over half a year, much longer than doctors first expected.
The vaccine's genetic material might stick around in your heart and immune tissues for up to a month after the shot, longer than scientists first thought based on animal tests.
Different COVID-19 vaccines change the proteins in breast milk in different ways. The Johnson & Johnson vaccine causes the most changes, while Moderna and Pfizer cause fewer.
After getting the COVID vaccine, moms who are breastfeeding don’t pass any of the vaccine ingredients into their breast milk.
Getting a COVID-19 vaccine while breastfeeding doesn’t really change the makeup of your milk — no big shifts in fats, nutrients, or proteins — so it probably doesn’t affect your milk much at all.
Getting COVID-19 while breastfeeding seems to change the makeup of breast milk—like its proteins, fats, and other chemicals—in a noticeable way.
A protein that helps control inflammation behaves differently after vaccination depending on whether someone had COVID before—going down in those who did, up in those who didn’t.
When vaccinated people get COVID anyway, their bodies seem to switch into a stronger, more targeted immune mode that uses special immune cells to fight the virus better.
If you've already had COVID and then get your first vaccine, your body might dial down certain blood clotting and inflammation proteins, which could mean your immune system is responding differently...
Getting your first COVID vaccine when you've never had the virus seems to turn on key parts of your immune system that help fight off infections, especially by boosting certain immune cells and...
Getting the COVID vaccine barely changes the proteins in your blood, but actually catching the virus causes big shifts in those same proteins.
Getting COVID-19 causes long-lasting changes in the body's immune system proteins, revealing new clues about how our bodies react to the virus.
Kids with certain PCSK9 gene changes keep having lower 'bad' cholesterol as they grow up—this finding is from the abstract summary - full study details were not available
African-American kids with certain PCSK9 gene changes (Y142X or C679X) have lower 'bad' cholesterol from a young age—this finding is from the abstract summary - full study details were not available
White kids who have a certain genetic change (R46L) in the PCSK9 gene tend to have lower 'bad' cholesterol levels from a young age—this finding is from the abstract summary - full study details were...
For people with heart disease, even when doctors start with a middle-strength cholesterol pill and adjust based on blood tests, more than half still end up needing the strongest dose to get their...
For people with heart disease, adjusting statin doses to hit a cholesterol target leads to about the same average 'bad cholesterol' level over 3 years as always using the strongest dose. This finding...
For people with heart disease, aiming for a specific 'bad cholesterol' level using adjustable statin doses works just as well over 3 years as starting with the strongest statin dose, when it comes to...
For people who can’t take statins because of muscle pain, evolocumab alone cuts bad cholesterol by over half and helps many reach safe levels, while another drug (ezetimibe) doesn’t work nearly as...
Evolocumab is very safe—even when used for over 8 years and when cholesterol drops to extremely low levels, it doesn’t cause serious side effects, diabetes, or memory problems. The only common issue...
The lower the bad cholesterol gets with evolocumab, the lower the risk of heart problems—even when cholesterol drops to very low levels, there’s still added protection, and no ‘too low’ point has...