antioxidant · for chronic fatigue
ALA
Works inside mitochondria and recycles other antioxidants, which is the basis for an energy claim.
Say that in clinical terms
Serves as mitochondrial cofactor in energy metabolism, regenerates vitamins C and E, enhances electron transport chain efficiency.
How strong is the research?
1 paper read.
Who was studied: The cited paper is about diabetes. The only fatigue trials are small and old.
Five searches across PubMed, Cochrane, and Crossref found no human trial testing alpha-lipoic acid as a monotherapy for chronic fatigue syndrome or ME/CFS. Every study that came up used ALA as part of a multi-ingredient combination: the existing cited paper (10.1016/j.aimed.2017.11.001) is a 10-patient open-label pilot with five active nutrients and no ALA-only arm; the Requpero 2022 study tested CoQ10 + ALA (not ALA alone) in post-COVID fatigue (not CFS); a fibromyalgia crossover tested ALA + pregabalin for pain, not fatigue; other ALA trials target neuropathy, weight, and oxidative stress endpoints. The ClinicalTrials.gov study NCT01872351 listed is for sodium dichloroacetate, not ALA. No
How much to take
daily
300–600 mg
R-lipoic acid form has superior bioavailability. Divide dose for better absorption.
Before you take it
- Hypoglycemia risk: ALA increases insulin sensitivity; co-administration with insulin or oral hypoglycemic agents (sulfonylureas, meglitinides) can produce clinically significant additive blood glucose reductions requiring monitoring.
- Biotin competition: ALA and biotin share cellular uptake via monocarboxylate transporters; sustained supplementation at doses ≥600 mg/day may reduce biotin bioavailability.
- No NIH/IOM Tolerable Upper Intake Level has been established for alpha-lipoic acid. A 2020 safety meta-analysis (Zembron-Lacny et al., PMC7603186; 4,749 subjects across placebo-controlled RCTs) found no increased risk of treatment-emergent adverse events vs. placebo across the studied dose range of 100–2,400 mg/day.
- Pregnancy and lactation: human safety data are insufficient; most authorities do not recommend routine ALA supplementation in these populations pending further study.
- Most commonly reported adverse effects are gastrointestinal (nausea, heartburn, bloating), occurring predominantly at doses ≥600 mg/day.
What we make of it
The source is about diabetes management.
The detail
The citation addresses alpha-lipoic acid in diabetes, not fatigue. Its role as a cofactor in the energy pathways is real biochemistry, but nothing here tests whether taking it makes anyone less tired.