Alzheimer’s disease affects memory, thinking, and behavior. Symptoms usually become more noticeable over time and may make everyday activities more difficult.

Chronic constipation means having ongoing difficulty passing stool or having bowel movements less often than usual. It can cause discomfort, bloating, and disruption to daily life.

Healthy volunteer studies include people who do not have the condition being studied. Their participation helps researchers learn more about the safety, dosing, and effects of potential treatments.

Heart disease includes several conditions that affect the heart or blood vessels. Research is helping improve how these conditions are prevented, detected, and treated.

Heart failure prevention focuses on managing health risks such as high blood pressure, diabetes, obesity, and heart disease. Taking action early may help protect the heart and delay or prevent heart failure.

Type 2 diabetes affects how the body uses insulin and manages blood sugar. Ongoing care can help control blood sugar and lower the risk of serious health problems.

Obesity is a long-term health condition involving excess body fat. It can raise the risk of other health concerns, and research is exploring new ways to support weight and overall health.

Knee osteoarthritis happens when the cushioning cartilage in the knee wears down over time. It can cause pain, stiffness, swelling, and difficulty moving.

RSV is a respiratory virus that can cause serious illness, especially in infants, older adults, and people with certain health conditions. RSV vaccines are designed to lower the risk of severe illness.

Quitting smoking can lower the risk of many serious health problems. Research is studying new tools and support options to help people quit and remain tobacco-free.

Type 2 diabetes and obesity are closely connected and can affect heart and overall health. Researchers are studying treatments that may support both blood sugar and weight management.