How much tryptophan do healthy older adults need?
This study aims to find out how much of an amino acid called tryptophan (a building block of protein) healthy older adults need. You will be asked to follow a special diet for a short time and have blood samples taken.
Summary written for real people, not researchers, by Clin2.
Who can take part
- You are between 60 and 90 years old.
- You are generally healthy, with no chronic diseases like diabetes or HIV.
- You are not taking steroids or other medications that affect protein processing.
- You have a body mass index (BMI) under 30.
- You are willing to have blood drawn and follow a special diet.
- You do not drink more than 2 cups of coffee or more than 1 alcoholic drink per day.
Quick eligibility check
Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.
Similar studies
Other trials that look related to this one.
This study measures how much threonine, an amino acid found in many foods, older adults need to stay healthy. Participants will follow a special diet for a short time and have blood tests.
This study looks at how well plant-based diets meet the body's protein needs in different age groups. You'll follow a plant-based eating plan temporarily, and researchers will check your blood to see how your body responds.
This study tests whether eating your meals within a shorter time window (like 8–10 hours) while adding a protein supplement can help older adults maintain muscle and health. If you are 60 or older, have a stable weight, and can adjust your eating schedule, you may be eligible.
This study looks at how much protein is best for building and maintaining muscle in healthy young adults. You may receive different amounts of protein and have your body's response measured to help find the optimal amount.
This study looks at the gut bacteria and a chemical called tryptophan (found in some foods) in people with Parkinson's disease compared with healthy people. It may help explain how the gut relates to Parkinson's symptoms. Participants will be asked to provide a stool sample.
This study compares how well the body digests protein from plant-based versus meat-based diets in young adults (18–23) and older adults (65–75). Researchers want to understand if age and diet type affect how efficiently your body uses protein from food.
Hear when a new Healthy Aging trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.