Study summary · research use only
Assessing the antioxidant and metabolic effect of an alpha-lipoic acid and acetyl-L-carnitine nutraceutical
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This study evaluated a dietary supplement combining alpha-lipoic acid (ALA) and acetyl-L-carnitine (ALC), including in vitro digestion testing under physiological and mitochondrial conditions and a human pilot study using Gas Chromatography-Mass Spectrometry (GC-MS) analysis of dried urine samples. The authors report elevated antiradical activity and reducing capacity for the nutraceutical, particularly under mitochondrial conditions after in vitro digestion, and a significant increase in urinary phosphate concentration in vivo (p = 0.004). A pro-oxidant effect was observed at a concentration of 4 capsules, leading the authors to suggest 2 capsules as a reasonable dose; no adverse effects were recorded in vivo at this dose. The authors describe the metabolic effect as inconclusive but suggest the ALA + ALC combination could be of interest as a dietary supplement warranting further study.
Abstract
Personalized nutrition (PN) is seen as a potentially effective and affordable strategy for the prevention of non-communicable diseases (NCDs). In this study we aimed to evaluate the antioxidant and metabolic effect of a dietary supplement based on alpha-lipoic acid (ALA) and acetyl-L-carnitine (ALC) in order to include this product in a novel PN service. The antioxidant properties of the commercial nutraceutical were investigated at physiological conditions (through in vitro digestion) and at mitochondrial conditions. The metabolic activity was assessed in a human pilot study using a Gas Chromatography-Mass Spectrometry (GC-MS) methodology in dried urine samples. The nutraceutical exerted an elevated antiradical activity and reducing capacity, especially at mitochondrial conditions, after in vitro digestion. This increase in mitochondrial activity was also evidenced in vivo by a significant increase in the urinary phosphate concentration (p = 0.004). As pro-oxidant effect was reached with the concentration of 4 capsules, 2 capsules at the same time could be a reasonable dose. No adverse effects were recorded in vivo with this dose. Thus, although its metabolic effect was not so conclusive, ALA + ALC combination might be beneficial as a dietary supplement for the prevention of the oxidative stress and an interesting dietary supplement to consider in large scale studies.
pepmg summarizes the peer-reviewed literature and links to every source — it sells nothing, ships nothing, and gives no medical, dosing, or human-use guidance. Don't just trust this summary: follow the citation to its source and read it yourself. Research use only.