Objective: Overweight and obesity are characterized by excess adiposity and systemic, chronic, low-grade inflammation, which is associated with several metabolic disorders. The aim of this study was to assess the feasibility and tolerability of β-alanine supplementation and to explore the effects on cardiometabolic health and cardiovascular, hepatic, and renal function in adults with overweight and obesity.
Methods: A total of 27 adults (44% female; mean [SD], age: 58 [10] years, BMI: 31.1 [2.9] kg/m, hemoglobin A1c: 39.8 [4.3] mmol/mol) received β-alanine (4.8 g/day) or a matched placebo for 3 months. Feasibility and tolerability outcomes included adherence, side effects, recruitment, attrition, and blinding, and exploratory outcomes included biochemical markers, blood pressures, and transthoracic echocardiography parameters. Data were analyzed using a Bayesian approach presented with 95% credible intervals (CrI).
Results: β-alanine was well tolerated and adhered to (adherence: placebo, 0.91 [95% CrI: 0.84-0.95]; β-alanine, 0.92 [95% CrI: 0.85-0.95]), and side effects remained at or below baseline throughout. The probability that β-alanine supplementation affected cardiometabolic, cardiovascular, or clinical biochemical outcomes was low.
Conclusions: Sustained-release β-alanine supplementation is well tolerated and adhered to in adults with overweight and obesity. Future research should consider more advanced metabolic conditions, which may benefit from longer duration supplementation.
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