Study: NCT05701657

Intervention type: OTHER
Group type: OTHER
Intervention: Diet A
Description: This diet has high amounts of fruits/vegetables, whole grains, and beans, moderate amounts of dairy, meat/poultry/eggs, nuts/seeds, and olive oil, and very low amounts of sugar sweetened drinks and desserts. Menus are developed for 1600kcal, 2100kcal, 2600kcal, 3200 kcal and 3700 kcal.

Intervention type: OTHER
Group type: OTHER
Intervention: Diet A
Description: This diet has high amounts of fruits/vegetables, whole grains, and beans, moderate amounts of dairy, meat/poultry/eggs, nuts/seeds, and olive oil, and very low amounts of sugar sweetened drinks and desserts. Menus are developed for 1600kcal, 2100kcal, 2600kcal, 3200 kcal and 3700 kcal.

Intervention type: OTHER
Group type: OTHER
Intervention: Diet B
Description: This diet has high amounts of refined grains, meat/poultry/egg, sugar sweetened drinks, snacks, desserts, and processed foods. It has a moderate amount of dairy and low amounts of fruits/vegetables, whole grains, and fish. Menus are developed for 1600kcal, 2100kcal, 2600kcal, 3200 kcal and 3700 kcal.

Intervention type: OTHER
Group type: OTHER
Intervention: Diet B
Description: This diet has high amounts of refined grains, meat/poultry/egg, sugar sweetened drinks, snacks, desserts, and processed foods. It has a moderate amount of dairy and low amounts of fruits/vegetables, whole grains, and fish. Menus are developed for 1600kcal, 2100kcal, 2600kcal, 3200 kcal and 3700 kcal.

Intervention type: OTHER
Group type: OTHER
Intervention: Diet C
Description: This diet has moderate-high amounts of vegetables, meat/poultry/egg, nuts/seeds, dairy and fats/oils, low amounts of fruits, and very low amounts of grains and sugars. Menus are developed for 1600kcal, 2100kcal, 2600kcal, 3200 kcal and 3700 kcal.

Intervention type: OTHER
Group type: OTHER
Intervention: Diet C
Description: This diet has moderate-high amounts of vegetables, meat/poultry/egg, nuts/seeds, dairy and fats/oils, low amounts of fruits, and very low amounts of grains and sugars. Menus are developed for 1600kcal, 2100kcal, 2600kcal, 3200 kcal and 3700 kcal.

Intervention type: OTHER
Group type: OTHER
Intervention: Liquid Mixed Meal Tolerance Test
Description: A liquid mixed meal tolerance test will occur in Module 1 and Module 3. For this test, participants will drink two servings of Ensure® Original, vanilla flavor. The meal will also contain acetaminophen (Tylenol) which will show how the smoothie moves through the participant's gut.

Intervention type: OTHER
Group type: OTHER
Intervention: Liquid Mixed Meal Tolerance Test
Description: A liquid mixed meal tolerance test will occur in Module 1 and Module 3. For this test, participants will drink two servings of Ensure® Original, vanilla flavor. The meal will also contain acetaminophen (Tylenol) which will show how the smoothie moves through the participant's gut.

Intervention type: OTHER
Group type: OTHER
Intervention: Diet-Specific Mixed Meal Tolerance Test
Description: The diet-specific mixed meal tolerance test is administered at the end of each dietary intervention period in Modules 2 and 3. The meal test is a breakfast meal similar to the one eaten on the 14-day diets. Thus, three test meals will be used, one for each of the three test diets (Diet A, Diet B, Diet C). The energy (kcal) level of the breakfast meal will be based on each participant's diet prescription. The nutritional composition diet-specific MMTT will be the same test meal for all participants.

Intervention type: OTHER
Group type: OTHER
Intervention: Diet-Specific Mixed Meal Tolerance Test
Description: The diet-specific mixed meal tolerance test is administered at the end of each dietary intervention period in Modules 2 and 3. The meal test is a breakfast meal similar to the one eaten on the 14-day diets. Thus, three test meals will be used, one for each of the three test diets (Diet A, Diet B, Diet C). The energy (kcal) level of the breakfast meal will be based on each participant's diet prescription. The nutritional composition diet-specific MMTT will be the same test meal for all participants.