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Smoking status: not checked. Vitamin A: what these mean for you changes depending on whether you smoke or used to, and you have not told us. That check was skipped.
Head-to-head evidence comparison — which supplement is right for you?
American Ginseng vs Vitamin A: Vitamin A has the stronger overall evidence (7 vs 5.2/10); they're alternatives for support immune system — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Vitamin A wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Too few graded studies
Top outcomes
Verdict
Limited support
2 of 9 studies with measurable effects showed benefit.
Top outcomes
200-400mg standardized extract daily (e.g. CVT-E002 for immune use); 1-3g root for glycemic use, taken before meals (a typical label dose, no cited trial states the dose it used)
Morning
Polysaccharide-standardized extract (immune) or root (glycemic)
The appropriate advice depends on the form of vitamin A, the reason for use, age, pregnancy status and total intake from all products. SupStack has not established a self-directed dose for this held use.
With fat-containing meal, Any time of day
Mixed carotenoids or low-dose retinyl palmitate
and 1 more not shown
and 2 more not shown
2-16 weeks
4-12 weeks
2-8 weeks
2-4 weeks
2-4 weeks
4-8 weeks
With chronic excess
Prevention and Treatment of Influenza, Influenza-Like Illness, and Common Cold by Herbal, Complementary, and Natural Therapies.
Journal of evidence-based complementary & alternative medicine (2017) · Review
North American ginseng listed among herbals found effective for respiratory illness
Complementary and alternative medicine for prevention and treatment of the common cold.
Canadian family physician Medecin de famille canadien (2011) · Systematic review
North American ginseng among reviewed cold-prevention options
Ginseng as a Treatment for Fatigue: A Systematic Review.
Journal of alternative and complementary medicine (New York, N.Y.) (2018) · Systematic review
Modest evidence for efficacy across 10 reviewed studies
Effects of primary or secondary prevention with vitamin A supplementation on clinically important outcomes: a systematic review of randomised clinical trials with meta-analysis and trial sequential analysis
BMJ open (2024) · Meta analysis · n=1671672
Vitamin A did not reduce mortality in individually randomised trials (RR 0.99, 95% CI 0.93 to 1.05; I²=32%; p=0.19; 105 trials; moderate certainty), and this effect was not affected by the risk of bias.
Vitamin and Mineral Supplementation During Pregnancy on Maternal, Birth, Child Health and Development Outcomes in Low- and Middle-Income Countries: A Systematic Review and Meta-Analysis
Nutrients (2020) · Meta analysis · n=451723
IFA supplementation showed notable improvement in maternal anemia and the reduction in low birthweight, whereas LNS supplementation had no apparent effect on outcomes; further research that compares LNS and MMN supplementation could help understand differences with these commodities.
Vitamin A supplements for reducing mother-to-child HIV transmission
The Cochrane database of systematic reviews (2017) · Meta analysis · n=7298
Five trials in Malawi, South Africa, Tanzania and Zimbabwe, none of whose participants received antiretroviral therapy. Four trials had 6995 women and one had 303.
Vitamin A has a higher evidence score (7/10 vs 5.2/10) and wins in 2 of 3 categories.
For support immune system, Vitamin A has a higher relevance score (75 vs 62).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.