Table 2

Prescribed and documented energy intakes on a selection of low-carbohydrate high-fat and low-fat high-carbohydrate diets

AuthorPrescribed energy intake on LCHF dietPrescribed energy restriction on LFHC dietDocumented energy intake on ad libitum LCHF dietDocumented energy intake on energy-restricted LFHC dietMean weight loss (kg)
Brehm et al31Ad libitum−500 kcal based on Harris-Benedict equation1608 kcal baseline
1302 kcal 6 months
1707 kcal baseline
1247 kcal 6 months
LC=−8.5*
LF=−3.9
Samaha et al42Ad libitum−500 kcal energy restriction2090 kcal baseline
1630 kcal 6 months
1848 kcal baseline
1576 kcal 6 months
LC=−5.8*
LF=−1.4
Yancy et al35Ad libitum−500–1000 kcal/day energy restriction1461 kcal1502 kcalLC=−12.0*
LF=−6.5
Nickols-Richardson et al34Ad libitum1500–1700 kcal/day limit2025 kcal baseline
1420 kcal 6 months
2340 kcal baseline
1395 kcal 6 months
LC=−6.4*
LF=−4.2
  • *p<0.05.

  • kcal, kilocalories.