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The complete Realised knowledge base. Each entry shows its confidence tier, the reasoning behind it, the underlying sources, and (where relevant) what would change our mind.
Tier reflects how confident Realised is in a claim, not just the type of study behind it. A meta-analysis with conflicting findings can sit at Moderate. A small RCT with a clean mechanism and replicated direction can sit at Strong. Each entry shows its tier reasoning: what evidence moved it up, what caveats hold it back, and where industry or publication bias may distort the picture.
Many entries have mixed tiers across dimensions. Vitamin D might be Strong for the underlying physiology, Moderate for clinical depression effect, and Emerging for respiratory infection prevention. We surface that split rather than flatten it.
The same tier system applies to genetic recommendations. Tier 1 for a genetic claim requires genotype-stratified intervention RCTs, replicated. Mechanism plus a non-stratified trial = Tier 2 at best. Most consumer genetics products grade at Tier 3 or Tier 4 by our standard. Most don't grade at all.