The purpose of our study is to investigate the effects of supplemental mannose on sera of humans who are healthy. We will perform proteomics studies to elucidate changes to glycan structure and protein level changes. We hypothesize that we may find that mannose supplies more properly glycosylated protein substrate and helps expedite protein synthesis, that excess mannose leads to alternative glycan structures which confer improved stability, or that there are new sites that become glycosylated after mannose supplementation.

Subjects will be enrolled and a baseline blood sample taken. Subjects will take mannose supplements for 1 week (3-4 packets of a standard dose in water), then a follow up blood sample will be taken.

Subject blood will be analyzed by proteomic analysis for 1) change in glycan structure or 2) other protein based approaches to measure changes in levels of proteins.

Inclusion Criteria:

• At least 18 years of age
• No known medical conditions
• Taking no medications or nutritional supplements
• Agree to the study and provide informed consent

Exclusion Criteria:

• Less than 18 years of age
• Known medical diagnosis, including pregnancy
• Presently taking medications and/or nutritional supplements
• Do not provide consent