Ketogenic Diet and Cardiovascular Effects

Lipid Profile Effects

Elevations in atherogenic lipoproteins, including LDL cholesterol, occur despite weight loss, which typically improves lipid profiles, as observed in a study of 24 obese individuals following the Atkins ketogenic approach for 3 months 1
The triglyceride reduction is particularly relevant for patients with insulin resistance and metabolic syndrome, with a decrease of 0.20 mmol/L (approximately 18 mg/dL) 2

Insulin levels drop by 8.32 pmol/L, with insulin resistance decreasing by 57% in those with pre-existing hyperinsulinemia, especially pronounced in individuals with metabolic syndrome and type 2 diabetes 3
Weight loss averages 2.59 kg, with BMI reduction of 1.59 kg/m², and intrahepatic lipid content reduces by approximately 31% in overweight individuals with non-alcoholic fatty liver disease 3

The European Society of Cardiology recommends saturated fatty acids comprise <10% of total energy intake, replaced by polyunsaturated fatty acids, which contradicts the typical ketogenic diet composition 4
The American Heart Association explicitly evaluated the Atkins ketogenic diet and concluded it does not meet criteria for cardiovascular health due to excessive total fat (53%), saturated fat (26%), and severely restricted carbohydrates (5%) 1

Omega-3 fatty acids, when included in ketogenic protocols, provide additional cardioprotection through reduced arrhythmia risk and improved endothelial function 2
Energy expenditure increases by approximately 52 kcal/day for every 10% decrease in carbohydrate contribution, which may contribute to weight loss 3

The diet increases risk of insufficient energy, fat, protein, and micronutrient intake if not meticulously planned, with documented deficiencies in calcium, vitamin A, thiamine, vitamin C, vitamin D, folate, and pantothenic acid 1, 3
Do not use in patients with or at risk of malnutrition, and in cancer patients who are already malnourished, restrictive diets may be harmful and should be avoided 3

The Mediterranean dietary pattern is recommended as first-line for cardiovascular risk reduction, emphasizing unsaturated fats, whole grains, fruits, vegetables, legumes, nuts, and fish, which aligns with established cardiovascular prevention guidelines 2, 4
Consider ketogenic diet only in specific scenarios, such as patients with severe obesity or metabolic syndrome, with mandatory monitoring of lipid panels, body composition, and micronutrient levels 3