Some Purdue projects ask volunteers to taste milk, change or record what they eat, or provide samples. Others involve surveys, sensors, exercise assessments or repeat visits. The listing gives different payment amounts, with some studies offering up to $500.
These are separate studies, not one shared enrollment pool. Each has its own eligibility rules, procedures, time commitment and contact details. The descriptions and payment amounts do not confirm that a study is still enrolling, so prospective participants should check with the research team before making plans.
The listing provides no nutrition-shake or supplement label to analyze: it reports no Supplement Facts panel, serving-size comparison, protein-to-calorie ratio or product ingredient dosages.
Nutrition studies cover milk, diet and gut measures
A human nutrition study is not automatically a test of a commercial shake, protein powder or functional ingredient. Purdue's listings describe specific research protocols. They do not show that claims such as "gut health" or "metabolism support" work.
Purdue's general research initiative update discusses the university's research infrastructure. It does not independently confirm the eligibility criteria, compensation, IRB details or current enrollment for individual studies. A separate preprint found in search analyzed 60 retail milk samples from 10 U.S. regions with seven omics approaches. That research concerns milk composition, not recruitment for these Purdue studies.
Milk, glucose and metabolism: The Nutrition Science study tests post-meal glucose and insulin responses to A1-Free and conventional milk, with and without a delayed lactose challenge. Healthy adults ages 18-65 may qualify, according to the listing. Procedures include milk-based drinks, blood draws and questionnaires. The listing notes possible minor discomfort from blood draws or digestive symptoms and offers up to $300. A screening survey is required. Contact Laura Robinson at ldelvers@purdue.edu or principal investigator Dennis Savaiano at savaiano@purdue.edu. Listed IRB: 2026-00000555.
Milk proteins and dairy avoidance: This study looks at gastrointestinal discomfort and other health outcomes in adults ages 18-65 who are dairy intolerant or avoid dairy. Other criteria apply. The listing offers up to $500. Contact Sathya Sujani at simaduwa@purdue.edu or 540-449-5205. Principal investigator: Dennis Savaiano. Listed IRB: 2025-1224.
Milk flavor: Adults ages 18-45 may qualify to taste different milks and answer questions. The listing describes one to 21 visits, each lasting up to 30 minutes, and a $5 gift card per visit. Contact Wajiha Zulfiqar at wzulfiqa@purdue.edu. Principal investigator: Cordelia Running. Listed IRB: 2026-00000473.
Chicory inulin: The Food Science listing seeks nonsmoking adults ages 18-45 with a BMI above 30 kg/m² and at least four bowel movements per week. The study runs for six weeks, followed by a six-week follow-up. It includes supplements, frequent stool samples, nine blood draws, and daily bowel, mood and food diaries. Listed compensation is up to $250. Contact Peter Jackson at 765-409-9789 or ppjackso@purdue.edu. Principal investigator: Stephen Lindemann. Listed IRB: 2026-00000242.
A culturally inspired snack: Researchers are studying a snack based on the traditional dieta de la milpa from Mexico and Central America. They are also measuring heart, kidney and gut-bacteria indicators. The listing seeks English-speaking Hispanic adults ages 18-65 with a BMI of at least 25 and a waist circumference of at least 34 inches for women or 40 inches for men. Participants make four research-center visits over six weeks and complete surveys and dietary recall. The study also collects four sets of blood, stool and urine samples. Listed compensation is $175. Contact Annabel Biruete at 765-494-1860 or clinicalnutritionlab@purdue.edu. Listed IRB: 2025-295.
Rural food environments and gut bacteria: Adults ages 18-80 who live in a rural area may qualify if they are not pregnant and have not taken antibiotics in the past six months. The study includes health, diet and experience surveys, a stool sample, four home-water samples, and height and weight measurements. Participants can take part in person or virtually. Those who attend in person make two trips to West Lafayette. Compensation is a $25 Amazon gift card plus travel reimbursement. Participants can request information about lead in their water. Contact Patricia Wolf at 765-496-0143 or wolflab@purdue.edu. Listed IRB: 2024-366.
Cysteine metabolism and colorectal cancer disparities: Adults ages 45-75 with a history of polyps may qualify if they are up to date on colonoscopy screening. Provider verification and other criteria apply. The 11-week study includes three diets, questionnaires, food logs and 11 visits, plus stool, water and blood samples. Participants receive $450 in three payments, according to the listing. They can also request water-quality information. Contact Patricia Wolf at 765-494-1860 or wolflab@purdue.edu. Listed IRB: 2023-1426.
Movement and cognition studies have different demands
Perimenopause, mood and cognition: The PACER Lab listing seeks people ages 40-60 who were assigned female at birth and have gone at least 60 days since their last menstrual period. A campus visit takes about five hours. It includes EEG, computer and puzzle-like tasks, questionnaires, an interview and an approximately 10 mL blood draw. Listed payment is $20 an hour, with a possible activity bonus. Contact the team at 765-496-0377 or whimsy@purdue.edu. Principal investigator: Dan Foti. Listed IRB: 2026-00000840.
Chronic kidney disease and falls: Brandon Kistler's lab seeks adults ages 45-79 with Stage 3 or Stage 4 CKD who are not on dialysis and are not expected to start within a year. The study lasts a year and includes a screening visit, three research visits, daily fall surveys, blood and urine samples, cognitive tasks and walking assessments. Listed compensation is $295 in three payments. Participants who do not finish the survey period may receive partial payment. Contact clinicalnutritionlab@purdue.edu. Principal investigator: Kistler. Listed IRB: 2024-1021.
Exercise recovery and hot tubs: Healthy adults ages 18-40 may qualify if they meet the listed exercise-history criteria. The protocol calls for nine visits over about three weeks. It includes a calf-exercise session designed to cause temporary soreness, five supervised hot-tub sessions, and strength, soreness and muscle-oxygenation assessments. The listing says payment is available but does not give an amount. Contact Jacob Pontorno at jpontorn@purdue.edu or principal investigator Bruno Roseguini at brosegui@purdue.edu. Listed IRB: 2026-00000789.
Fitness, hormones and brain function: The listing seeks women ages 18-35 with natural menstrual cycles who meet specified exercise, medication and other criteria. Three lab visits include surveys, computer games, a treadmill VO₂max test, body-composition scanning, EEG, cycling and optional small blood draws. At-home ovulation tests help schedule the sessions. Listed compensation is up to $250. Contact panchlaboratory@purdue.edu. Principal investigator: Shih-Chun Kao. Listed IRB: 2025-809.
Age and the autonomic nervous system: Nonsmokers ages 18-35 or over 65 may qualify if they meet the listed health and activity criteria. Three sessions measure heart, blood-vessel and respiratory activity at rest and during simulated altitude exposure. Full participation pays $250. The listing breaks that into $50 for the first visit and $100 for each remaining visit; it says no payment is made if a participant completes no visits. Contact Qudus Ojikutu at qojikutu@purdue.edu or 765-409-4097, or Igor Fernandes at igorfernandes@purdue.edu or 765-494-3184. Listed IRB: 2023-1048.
Brain processing and aging: Adults ages 21-40 or 56-75 may qualify for a study of how the brain processes object shape and location. The listing offers a 90-minute session for a $30 Amazon gift card or a two-hour session for $40. Contact agarw467@purdue.edu. Principal investigator: Anne Sereno. Listed IRB: 2025-511.
Swallowing and brain imaging: Healthy adults ages 18-30 or 60-85 without swallowing problems may qualify for a swallowing evaluation and brain MRI. The listing says the evaluation is free and compensation is up to $40. Contact swallowinglab@purdue.edu or 765-496-0207. Principal investigator: Georgia Malandraki. Listed IRB: 2023-714.
Memory and daily interactions: The CADI study seeks adults ages 55-70 who have recently experienced memory difficulties. Some may have been told they have mild cognitive impairment. After a brief phone screening, selected participants visit Purdue or meet by Zoom, then complete two weeks of daily surveys and brain games on a phone or tablet. The study can supply a device if needed. Listed compensation is up to $100. Contact CADI@purdue.edu. Principal investigator: Susan South. Listed IRB: 2024-435.
Visual media and children: Caregivers and children ages 7-9 are invited to take part in two sessions over two weeks. The listing includes surveys, a video, body sensors, saliva samples and snack breaks. Total participation takes about three hours. Parents may receive up to $85 in gift cards. Contact childhealth@purdue.edu. Principal investigator: Kameron Moding. Listed IRB: 2025-1114.
Early language and reading: Children ages 4-7 may attend one campus visit lasting 1.5-2 hours for language- and reading-related activities. A parent or guardian completes a short questionnaire. The listing offers $10 per hour. Contact Rebecca Marks at marks95@purdue.edu. Listed IRB: 2026-499.
Physiological responses and cognitive tasks: Researchers seek healthy adults ages 18-65 for a session lasting about 1 hour and 45 minutes. Participants complete tasks and surveys while wearing noninvasive heart-rate, eye-tracking and brain-activity sensors. Those who finish receive a $20 Amazon gift card, according to the listing. Applicants are asked to note certain health circumstances during sign-up. Contact Johnson Adetooto at jadetoot@purdue.edu. Principal investigators: Behzad Esmaeli and Son Young-Jun. Listed IRB: 2025-1134.
Body composition and e-cigarette use: Adults ages 18-30 who currently use e-cigarettes and those who have never used them are invited to complete a questionnaire and have their body composition, blood pressure and grip strength measured. Participants receive their assessment results, the listing says. Contact wilso774@purdue.edu. Study conducted by Mark Wilson. Listed IRB: 2023-204.
Other projects look at speech, games and relationships
Speech movement and stuttering: Purdue's Speech Kinematic Sensor Integration Learning Lab lists paid studies for adults and children. Sessions last one to three hours in a quiet lab. Participants may speak into a microphone or wear an electrode cap or motion-tracking sensors. The listing offers $15 an hour and says parking or transportation costs may be reimbursed. Contact skill@purdue.edu or 765-496-0215. Principal investigator: Kwang S. Kim. Listed IRB: 2023-744. A separate listing specifically seeks adults who stutter and gives the same session length, payment and contact details.
Eco-Industry board game: Adults who can take part in English and have not played the game or joined the study before may attend an in-person session in West Lafayette. The session includes a pregame survey, about 90-120 minutes of gameplay and a postgame survey. Total participation takes roughly 2-2.5 hours. Participants may receive a $15 gift card. Contact Yiming Liu at liu3285@purdue.edu, Matthew Spacone at mspacone@purdue.edu or Daniela Graterol at dgratero@purdue.edu. Principal investigator: Hua Cai. Listed IRB: 2026-00000014.
Breast cancer survivorship and partners: Survivors who have completed cancer treatment may participate alone or with a cohabiting romantic partner. The study examines relationships and stress during survivorship through an online survey and a seven-day mobile-app diary. Couples may also take part virtually or at Purdue. Each person may earn up to $150, or $300 per couple, according to the listing. Contact RelationshipsAndHealthLab@Purdue.edu or 812-518-9498. Principal investigator: Rosie Shrout. Listed IRB: 2022-538.
Parenting stress and marriage: Researchers seek parents of children under five to complete three short surveys a day for 14 days. Each survey takes about 10 minutes, according to the listing. Participants may earn up to $100. Contact pasar@purdue.edu. Principal investigator: Susan South. Listed IRB: 2025-1563.
How to assess a nutrition claim separately
The studies are not a substitute for comparing product labels. The NIH supplement guide explains supplement labels and questions consumers can consider. For a shake or powder, check the serving size in grams, calories, protein source and amount, added sugars, fiber, allergens and cost per serving. A proprietary blend may list its total weight but not the amount of each ingredient, which makes dose comparisons difficult.
A study's subject matter or a product's use of phrases such as "clean," "detox," "immune support" or "metabolism" does not prove a benefit. Check whether the product discloses ingredient amounts and whether evidence supports the specific ingredient and claim. Before joining a study, confirm that recruitment is open, review the procedures and risks with the research team, and ask how compensation is calculated. The search results reviewed here did not independently confirm current enrollment, study completion, results or payments for the individual Purdue listings.
