ISSA Nutritionist Practice Exam 2025 – Comprehensive All-In-One Guide to Exam Mastery!

Soluble fiber is known for its beneficial effects on cholesterol levels, particularly lowering total and LDL (low-density lipoprotein) cholesterol. The mechanism behind this involves the way soluble fiber interacts with bile acids in the digestive system. When soluble fiber is ingested, it forms a gel-like substance that can bind to bile acids, which are made from cholesterol.

As the body works to replace the bile acids that are lost due to this binding, it pulls cholesterol from the bloodstream to do so. Consequently, this process can lead to a reduction in overall cholesterol levels, particularly LDL cholesterol, which is often referred to as "bad" cholesterol due to its association with an increased risk of heart disease when levels are elevated.

In summary, soluble fiber effectively aids in lowering cholesterol levels through its interaction with bile acids, leading to a decreased concentration of cholesterol in the bloodstream.