People who took GLP-1 showed signs that their B-cells were starting to work more effectively.

BBC: Diabetes hormone treatment hope

These B-cells produce the hormone insulin that regulates the way sugar is broken down in the body.

BBC: Diabetes hormone treatment hope

The protein is a growth factor that leads to the production of certain immune cells, called B-cells.

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B-cells are a key component of the immune system, producing disease-fighting antibodies.

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B-cells play a critical role in keeping the immune system healthy.

CNN: iReport: 'Billy's Disease' baffles doctors

Billy, a father of two who dreams of opening up his own restaurant one day, appears to have some type of problem with B-cells, according to Nikki.

CNN: iReport: 'Billy's Disease' baffles doctors

It also hopes to use BLYS as a homing device to deliver tiny doses of radiation directly to cancerous tumors that hit the B-cells, such as lymphoma.

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However, closer examination revealed differences between men and women in two key components of the immune system - T-cells, which protect the body from infection, and B-cells, which secrete antibodies.

BBC: Biological clue to why women live longer than men

Most did nothing, but one protein he tested in April 1998 had remarkable properties: It made a crucial class of immune cells called B-cells grow like crazy, while having little effect on other cells.

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Benlysta is delivered directly into a vein (intravenous infusion) and is the first inhibitor designed to target B-lymphocyte stimulator (BLyS) protein, which may reduce the number of abnormal B cells thought to be a problem in lupus.

FORBES: Human Genome Sciences' Benlysta Approved To Treat Lupus

And it has Vitamin B-12 -- you need this to keep your nerve cells healthy.

CNN: Red meat linked to higher metabolic syndrome risk