Final answer:
The symptom of flushing experienced by the family friend is likely due to the intake of niacin, which is often used as a natural supplement to treat high cholesterol. While niacin can help with cholesterol management, it is crucial to consult with a healthcare provider before starting any new supplement.
Step-by-step explanation:
The individual in question likely experienced flushing due to the consumption of niacin, also known as vitamin B3, which is a common dietary supplement used to treat high cholesterol. This is a well-known side effect of high doses of niacin. It is important to consult with a healthcare provider before taking dietary supplements to manage cholesterol levels because they can interact with other medications and may not be suitable for everyone. Flushing can be uncomfortable, but it is usually harmless. However, if the side-effect is severe or bothersome, it is advisable to seek medical advice. Other methods to naturally reduce cholesterol include eating a diet high in fruits, vegetables, whole grains, and lean proteins, as well as exercising regularly and avoiding tobacco smoke.