| Parameter | Description | Unit |
| β | energy intake rate to body | 1/day |
| α | half saturation constant for leptin energy intake reduction | μg/dL |
| c1 | production rate of leptin from fat mass | μg/(kg * dL * day) |
| c2 | production rate of insulin from fat mass | μg/(dL * day) |
| c3 | half saturation constant of insulin secretion | kg |
| δ1 | decay rate of fat mass | 1/day |
| δ2 | decay rate of muscle mass | 1/day |
| δ3 | decay rate of leptin | 1/day |
| δ4 | decay rate of insulin | 1/day |
| δ5 | decay rate of uric acid | 1/day |
| ε1 | rate of muscle mass reduction due to uric acid | dL (μg/day) |
| ε2 | muscle mass reduction rate due to uric acid influence | dL (μg/day) |
| σ | production rate of uric acid from energy intake | mg/(dL * kg * day) |
| η | half saturation constant of uric acid excretion | μg/dL |
| γ1 | constant rate of leptin influence on uric acid excretion | dL/μg |
| γ2 | constant rate of insulin influence on uric acid excretion | dL/μg |