Asthma
Supplements studied for asthma.
Overview
SupplementDEX indexes 22 supplements for asthma across 48 studies.
Vitamin D (DEX Score 68; medium effect size, very high evidence, medium trust) shows mixed results: it may reduce flare-ups in mild asthma but not severe disease, with some trials reporting roughly one-third fewer attacks and others finding no effect. Caffeine (DEX Score 64; medium effect size, medium evidence, high trust) may offer temporary relief for some airway symptoms but does not broadly improve asthma control or quality of life.
Vitamin C (DEX Score 40; very low effect size, high evidence, medium trust), L-Citrulline (DEX Score 44; low effect size, low evidence, medium trust), and Probiotics (DEX Score 44; low effect size, low evidence, medium trust) show no meaningful benefit in available evidence. See the heatmap and evidence reviews below for all indexed supplements.
Effect graph
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Relevant supplements heatmap
Relevant supplements sorted by DEX Score.
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SupplementDEX Database
22 supplements for , and rated at least stars. All purchase bands. No minimum star filter.
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Evidence visualised
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Visual summaries of supplement evidence ranked by condition.
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