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Clinical outcomes of mitochondrial-enhancing nutraceutical supplementation in psychiatric disorders: A systematic review

Tortajada J, Bulduk BK, Alfonso-Landete B, Alcaide-Barriga P, Ballvé-Gelonch B, Garrabou G, Vilella E, Alonso Y et al.

General psychiatry, 2026

Abstract

Background: Nutraceutical supplementation targeting mitochondrial function has been proposed as a beneficial therapeutic strategy to improve physical and mental health in psychiatric patients.

Aims: To summarise the results of studies evaluating nutraceutical supplementation targeting mitochondrial function in patients with psychiatric disorders.

Methods: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, we searched PubMed, Embase and Scopus databases from 1 January 2007 to 30 April 2024. Reports were included if they evaluated outcomes of nutraceutical supplementation in patients with psychiatric disorders or related conditions. Additionally, we performed a risk-of-bias analysis of the studies compatible with the RoB2 tool.

Results: Of the 2061 records identified, 122 studies met the inclusion criteria, evaluating vitamin D3, N-acetylcysteine, acetyl-L-carnitine, coenzyme Q10, alpha-lipoic acid, magnesium, vitamin B6, vitamin B7, folic acid, vitamin B12, vitamin E, vitamin A, vitamin C and vitamin B3. The most studied nutraceuticals were vitamin D3 (27.05%) and N-acetylcysteine (15.6%). Among randomised controlled clinical trials (RCTs), vitamin D3 was the most extensively investigated and accounted for the highest number of trials reporting improvements in clinical outcomes, although findings were heterogeneous. Notably, 14.8% of the studies evaluated combinations of three or more nutraceuticals. Dietary supplements were…

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