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ALVA is with you in every step.

Understand what matters.

Ask ALVA anything about health. We explain it in plain words and show the level of evidence.

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Evidence ladder

Evidence ladder

EstablishedStrong evidence
EmergingPromising, still being studied
ExperimentalEarly, not ready as proof
NarrativeLived experience, not proof

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Popular topics

NutritionAsk ALVA about food basics
Physical activityAsk ALVA about movement
Restorative sleepAsk ALVA about sleep
Stress managementAsk ALVA about stress
Risky substancesAsk ALVA about risk
Social connectionAsk ALVA about support

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Where BLEU gets evidence

PubMedBiomedical literature and studies
NCBITrusted data from the NCBI
CochraneHigh-quality evidence reviews
CDCPublic health guidance
NIHResearch and health information
USDA GuidelinesDietary guidance and resources