| Available energy in kcal (kJ) | |||
| Organ | Glucose or glycogen | Triacylglycerol’s | Mobilizable proteins |
| Blood | 60 (250) | 45 (200) | 0 (0) |
| Liver | 400 (1700) | 450 (2000) | 400 (1700) |
| Brain | 8 (30) | 0 (0) | 0 (0) |
| Muscle | 1200 (5000) | 450 (2000) | 24,000 (100,000) |
| Adipose tissue | 80 (330) | 135,000 (560,000) | 40 (170) |