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Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Stable Isotopes

Stable Isotopes in Metabolism and Nutrition Research

Stable isotopically-labeled compounds are used for in vivo studies of both nutrition and metabolism mechanisms. Labels, whether 13C, D, or 15N, offer researchers a way to track the mechanisms by which organisms metabolize nutrients.

We offer a complete line of labeled compounds, including carbohydrates, amino acids, fatty acids, doubly labeled water, and other bioactive materials. Many of our products are sterility and pyrogen tested as well.