I've heard about how the city government here is starting to cut into bone, not just fat.

WHITEHOUSE: "White House to Main Street" Town Hall: Elyria, OH

That's because the appearance of a face is made of many components: skin, fat, muscle and bone.

CNN: Face transplant patient ready to go home

In particular, the potential for mesenchymal stromal cells (MSCs) to differentiate into multiple phenotypes - like fat, cartilage and bone - make them ideal building blocks for bone and cartilage tissue engineering in orthopaedics and rheumatology.

UNESCO: 2010 UK and Ireland Winners

The iron stove had a cast-iron warmer on the top, and in that warmer would be pork roasts and pork chops and fried chicken, two gallon pots of butter beans with salt pork, navy beans with ham bone, rattlesnake beans glistening with bacon fat, pans of chicken and dressing, macaroni and cheese, cornbread and cathead biscuits, mounds of mashed potatoes and sweet potatoes, skillets of fried green tomatoes.

NPR: Excerpt: 'The Prince of Frogtown'

The research found thin people were less protected by body fat so had an increased risk of bone fractures, which could raise their injury rate.

BBC: Accident risk for fat drivers

As a result, the fat accumulates in the liver, spleen and bone marrow, causing bone damage, anemia and possibly death.

FORBES: Magazine Article

This is because BMI does not distinguish between fat mass and lean mass (muscle, water, bone, etc).

FORBES: How Useful Is Body Mass Index In Predicting Long-Term Health?