Seven Sam's Club pharmacies in the Austin, Texas, area are taking part in a pilot program that tests people's blood for uses such as possible reactions to GLP-1, the popular weight loss drug.

A new device for taking blood samples uses microneedles and a suction cup instead of a large needle. People with a phobia of needles stand to benefit. More blood can be obtained than with the classic ...

A blood osmolality test measures the blood for the concentration of certain dissolved particles. This test can show whether a person has an irregular balance of fluids in their body. Osmolality tests ...