Best Supplements for Reduced Oxidative Stress
Ranked by research evidence. Compare 77 supplements across 100 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Moderate evidence4 studies
Across 3 of 4 studies, statistically significant beneficial effects on reducing oxidative stress were reported, yielding a mixed predominant effect size (ranging from small to large). Higher-quality evidence in clinical populations (coronary artery disease, older women with sarcopenia) showed moderate-to-large effects. The median study duration was 84 days (12 weeks), suggesting effects typically require several weeks, though most studies did not specify form or dose.
- Low evidence5 studies
Across 5 studies (all beneficial), moderate effects on reducing oxidative stress were observed in animal and cell models. No human studies were identified. The predominant effect size was moderate, but only 2 of 5 studies reported statistically significant results.
- Low evidence3 studies
Across 3 studies, all reported beneficial effects of vitamin D on reducing oxidative stress, with effect sizes ranging from small to large. One high-quality clinical trial in multiple sclerosis patients found large reductions using 50,000 IU/week for 8 weeks (median study duration 56 days). Effects were also observed in healthy adults, though one study used a multi-ingredient probiotic blend, limiting attribution to vitamin D alone.
Product matchViva Naturals — Vitamin D3 with Organic Liquid Coconut Oil125 mcg · $15.16 · ★5.0 (208)
- LowLactobacillus rhamnosusAcross 5 studies (all beneficial), moderate effects on reducing oxidative stress were observed in animal and cell models. No human studies were identified. The predominant effect size was moderate, but only 2 of 5 studies reported statistically significant results.5 beneficial5 studies
- ModerateVitamin CAcross 3 of 4 studies, statistically significant beneficial effects on reducing oxidative stress were reported, yielding a mixed predominant effect size (ranging from small to large). Higher-quality evidence in clinical populations (coronary artery disease, older women with sarcopenia) showed moderate-to-large effects. The median study duration was 84 days (12 weeks), suggesting effects typically require several weeks, though most studies did not specify form or dose.3 beneficial1 neutral4 studies
- LowVitamin DAcross 3 studies, all reported beneficial effects of vitamin D on reducing oxidative stress, with effect sizes ranging from small to large. One high-quality clinical trial in multiple sclerosis patients found large reductions using 50,000 IU/week for 8 weeks (median study duration 56 days). Effects were also observed in healthy adults, though one study used a multi-ingredient probiotic blend, limiting attribution to vitamin D alone.3 beneficial3 studies
- LowN-Acetyl CysteineAcross 3 studies, all 3 reported beneficial effects of N-Acetyl Cysteine (NAC) on reducing oxidative stress, with moderate effect sizes in 2 studies and a small effect in 1. The most-studied doses were 600–1200 mg/day, and effects were observed in clinical populations including children with obesity/MASLD and adults with coronary artery disease. Median study duration was 112 days (16 weeks), though only 1 of 3 studies reported duration. · Dose: 600–1200 mg/day3 beneficial3 studies
- LowBifidobacterium plantarumAcross 3 studies, all reported beneficial effects of Bifidobacterium plantarum on reducing oxidative stress, with effect sizes ranging from small to moderate. No consistent dose or population data were available across studies.3 beneficial3 studies