PMID- 32252374 OWN - NLM STAT- MEDLINE DCOM- 20200410 LR - 20200523 IS - 2072-6643 (Electronic) IS - 2072-6643 (Linking) VI - 12 IP - 4 DP - 2020 Apr 2 TI - The Effects of Different Degrees of Carbohydrate Restriction and Carbohydrate Replacement on Cardiometabolic Risk Markers in Humans-A Systematic Review and Meta-Analysis. LID - 10.3390/nu12040991 [doi] LID - 991 AB - Low-carbohydrate diets (LCDs) often differ in their diet composition, which may lead to conflicting results between randomized controlled trials. Therefore, we aimed to compare the effects of different degrees of carbohydrate (CHO) restriction on cardiometabolic risk markers in humans. The experimental LCDs of 37 human trials were classified as (1) moderate-low CHO diets (<45-40 E%, n = 13), (2) low CHO diets (<40-30 E%, n = 16), and (3) very-low CHO diets (<30-3 E%; n = 8). Summary estimates of weighted mean differences (WMDs) in selected risk markers were calculated using random-effect meta-analyses. Differences between the LCD groups were assessed with univariate meta-regression analyses. Overall, the LCDs resulted in significant weight loss, reduced diastolic blood pressure BP, and increased total cholesterol and high-density lipoprotein cholesterol (HDL-C), without significant differences between the three LCD groups. Higher low-density lipoprotein cholesterol (LDL-C) concentrations were found with the very-low CHO diets compared to the moderate-low CHO diets. Decreases in triacylglycerol (TAG) concentrations were more pronounced with the low and very-low CHO diets, compared to the moderate-low CHO diets. Substitution of CHO by mainly saturated fatty acids (SFAs) increased total cholesterol, LDL-C, and HDL-C concentrations. Except for LDL-C and TAGs, effects were not related to the degree of CHO restriction. Potential effects of nutrient exchanges should be considered when following LCDs. FAU - Fechner, Eva AU - Fechner E AD - Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, PO Box 616, 6200 MD Maastricht, The Netherlands. FAU - Smeets, Ellen T H C AU - Smeets ETHC AD - Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, PO Box 616, 6200 MD Maastricht, The Netherlands. FAU - Schrauwen, Patrick AU - Schrauwen P AUID- ORCID: 0000-0002-0973-847X AD - Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, PO Box 616, 6200 MD Maastricht, The Netherlands. FAU - Mensink, Ronald P AU - Mensink RP AD - Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center, PO Box 616, 6200 MD Maastricht, The Netherlands. LA - eng PT - Journal Article PT - Meta-Analysis PT - Systematic Review DEP - 20200402 PL - Switzerland TA - Nutrients JT - Nutrients JID - 101521595 RN - 0 (Dietary Carbohydrates) RN - 0 (Triglycerides) RN - 97C5T2UQ7J (Cholesterol) SB - IM MH - Cardiovascular Diseases/blood/epidemiology/etiology/prevention & control MH - Cholesterol/*metabolism MH - *Diet, Carbohydrate-Restricted MH - Dietary Carbohydrates/*administration & dosage/*metabolism MH - Humans MH - Triglycerides/*metabolism PMC - PMC7230871 OTO - NOTNLM OT - LCD OT - adults OT - carbohydrate restriction OT - cardiovascular risk OT - low-carbohydrate diets OT - meta-analysis OT - randomized controlled trials COIS- The authors declare no conflict of interest. EDAT- 2020/04/08 06:00 MHDA- 2020/04/11 06:00 PMCR- 2020/04/01 CRDT- 2020/04/08 06:00 PHST- 2020/01/26 00:00 [received] PHST- 2020/03/30 00:00 [revised] PHST- 2020/03/31 00:00 [accepted] PHST- 2020/04/08 06:00 [entrez] PHST- 2020/04/08 06:00 [pubmed] PHST- 2020/04/11 06:00 [medline] PHST- 2020/04/01 00:00 [pmc-release] AID - nu12040991 [pii] AID - nutrients-12-00991 [pii] AID - 10.3390/nu12040991 [doi] PST - epublish SO - Nutrients. 2020 Apr 2;12(4):991. doi: 10.3390/nu12040991.