Final answer:
Bob should take action to lower his LDL cholesterol, which at 160 mg/dl is considered high, through diet changes and increased exercise, and should consult a healthcare provider.
Step-by-step explanation:
If Bob has just found out that his LDL cholesterol has increased to 160mg/dl, he should take steps to lower it, as an LDL level above 160 mg/dL is considered high. To address high LDL levels, Bob should consider dietary modifications, such as reducing his intake of saturated fats and trans fatty acids, and increasing his consumption of unsaturated fats.
Additionally, increasing physical activity can help improve his LDL:HDL ratio and lower his total cholesterol. It is important for Bob to consult with a healthcare provider for personalized advice and to develop a comprehensive plan to reduce his risk of heart disease.