Clinical Research Directory

Inclusion Criteria: 1. Able to give informed consent 2. Adults 21-80 years old 3. English-literate 4. Have venous access sufficient to allow for blood sampling as per the protocol 5. No drastic change of diet for the past 1 year 6. If taking medication, has been consistently taking antihypertensive/cholesterol-lowering/type-2 diabetic medication for more than 5 years prior to starting the study. Exclusion Criteria: 1. Taking dietary supplements and fermented foods, which may impact the gut microbiota (e.g. antibiotics, prebiotics, probiotics, yogurt, kimchi) 2 months before starting the 1st study visit only. 2. Taking dietary supplements or medications, which may impact sleep outcomes (e.g. Nutritional Shakes (e.g. Ensure), tryptophan, 5-hydroxytryptophan or melatonin supplementations) 1 month before starting the study. 3. Taking dietary supplements which may impact the eye outcomes (e.g. Vitamin A, vitamin A-containing multivitamin) 2 months before starting the study.