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Table 7 Selected values from FAO/WHO/UNU safe levels of protein intake and energy requirements of children and adults, as well as during pregnancy and lactation, for the healthy population[109]

From: Suggested guidelines for the diagnosis and management of urea cycle disorders

PROTEIN INTAKE ENERGY REQUIREMENTS
Age Intake Age Females Males Females Males
months g/kg bw/day years kJ/kg bw/day kcal/kg bw/day
1    0.5 340 335 81.3 80.0
2 1.50 2.5 334 348 79.8 83.2
3 1.36 5.0 305 315 72.9 75.3
6    10 248 275 59.3 65.7
12 1.14 15 193 230 46.1 55.0
 years        
1.5 1.03 Adults, moderate activity level, 70kg body weight
2 0.97    
3 0.90 18-29 159 183 38.0 43.7
4-6 0.87 30-59 148 175 35.4 41.8
7-10 0.92      
  Females Males Adults, moderate activity level, 50kg body weight
years     
11 0.90 0.91 18-29 180 212 43.0 50.7
12 0.89 0.90 30-59 183 212 43.7 50.7
13 0.88 0.90  
14 0.87 0.89 Pregnancy total extra energy requirements
15 0.85 0.88  trimester   kJ/day   kcal/day 
16 0.84 0.87 1st 375 90
17 0.83 0.86 2nd 1200 287
18 0.82 0.85 3rd 1950 466
> 18 0.83 0.83  
    Lactation total extra energy requirements
Pregnancy:  months   kJ/day   kcal/day 
Total extra protein intake    
 trimester   g/day  1-6 2800 669
1st 1 >6 1925 460
2nd 10    
3rd 31    
Lactation:    
Total extra protein intake    
 months   g/day     
1- 6 19    
> 6 13    
  1. bw: body weight.