Figure 4: The effect of different concentration of walnut leaf on HDL-C level (mg/dl) (P<0.05). Group1: received 1% cholesterol and 1% walnut leaf powder in daily diets. Group2: received 1% cholesterol and 2% walnut leaf powder in daily diets. Group3: received 1% cholesterol and 5% walnut leaf powder in daily diets. Group4: received 1% cholesterol in daily diet (Hypercholesterolemic control). Group5: received normal daily diet (normal control). * Significant differences with group 4. ** Significant differences with group 5. Δ Significant differences with group 3. □ Significant differences with group 2.