Ketoanalogue Supplementation Benefits for CKD Patients

Guideline Framework for Ketoanalogue Use

The KDIGO guidelines recommend prescribing a very low-protein diet (0.3-0.4 g/kg/day) supplemented with ketoacid analogs to achieve total protein equivalence of 0.6 g/kg/day under close supervision for CKD G3-5 patients at risk of kidney failure who are willing and able 2
The KDOQI guidelines recommend very low-protein diets providing 0.28-0.43 g dietary protein/kg/day with additional ketoanalogs to meet total protein requirements of 0.55-0.60 g/kg/day 3

The protein source (animal vs. plant) does not alter the fundamental benefits of ketoanalogue supplementation, as KDOQI explicitly states there is insufficient evidence to recommend a particular protein type in terms of nutritional status, calcium, phosphorus levels, or lipid profiles 1

CKD stage 3b-5 (eGFR <45 ml/min/1.73m²) not yet on dialysis, metabolically stable with good nutritional status, and willing and able to comply with dietary restrictions should be considered for ketoanalogue supplementation 2
Prescribe 0.3-0.4 g/kg/day dietary protein (can be from animal or plant sources) and supplement with ketoanalogues to reach total protein equivalence of 0.6 g/kg/day 2
Ensure adequate energy intake of 25-35 kcal/kg/day 3

Do not prescribe ketoanalogue-supplemented very low-protein diets in metabolically unstable CKD patients, children with CKD, older adults with frailty or sarcopenia without careful consideration of higher protein needs, or patients with sodium-wasting nephropathy 2