Purpose of ReviewReferral to nutrition care providers in the USA such as registered dietitian nutritionists (RDNs) for medical nutrition therapy (MNT) remains low. We summarize research on the effectiveness of MNT provided by dietitians versus usual care in the management of adults with dyslipidemia. Improvements in lipids/lipoproteins were examined. If reported, blood pressure (BP), fasting blood glucose (FBG) glycated hemoglobin (A1c), body mass index (BMI), and cost outcomes were also examined.Recent FindingsThe synthesis of three systematic reviews included thirty randomized controlled trials. Multiple MNT visits (3–6) provided by dietitians, compared with usual care, resulted in significant improvements in total cholesterol (mean range: − 4.64 to − 20.84 mg/dl), low-density lipoprotein cholesterol (mean range: − 1.55 to − 11.56 mg/dl), triglycerides (mean range: − 15.9 to − 32.55 mg/dl), SBP (mean range: − 4.7 to − 8.76 mm Hg), BMI (mean: − 0.4 kg/m2), and A1c (− 0.38%). Cost savings from MNT were attributed to a decrease in medication costs and improved quality of life years (QALY).SummaryMultiple MNT visits provided by dietitians compared with usual care improved lipids/lipoproteins, BP, A1c, weight status, and QALY with significant cost savings in adults with dyslipidemia and justify a universal nutrition policy for equitable access to MNT.