He put a viral diet trend to the test, and the results were visible after just 48 hours.

Limiting your diet to a single food like sardines for extended periods can have negative health effects. Santiago Urquijo/Getty Images A North Carolina woman ate nothing but sardines for more than ...

A new fad diet has emerged over the past few years: eating only sardines. Dietitians warn this diet could lead to substantial nutrient deficiencies. Sardines are full of healthy fat and protein.

Sardine fasting is a relatively new trend gaining popularity on social media. (Getty Images) The so-called "sardine fasting" or "sardine diet" is a form of ketogenic diet, and is designed to move away ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Sardine fasting was invented by Dr. Annette Bosworth, aka Dr. Boz, who ...