The one axis you can check on yourself: variants that change the perception rather than the odds.
Why this topic Everything else here is a probability. This is the part a reader can test at dinner.
Counted in Europe PMC, where the title or abstract names both this topic and that rsID. The number is papers, not evidence of a cause.
TAS2R38
Bitter taste perception (PTC/PROP tasting)
14 papers →TAS2R38
Bitter taste perception (TAS2R38 position 262)
12 papers →TAS2R38
Bitter taste perception (TAS2R38 position 296)
9 papers →MTHFR
Folate metabolism (MTHFR C677T)
1 paper →F5
Blood clotting risk (Factor V Leiden)
1 paper →Europe PMC, title and abstract only, searched for “bitter taste perception”, “olfactory receptor”, “specific anosmia”, “taste perception” alongside each published rsID. Full text was not counted: it returns every paper with an rsID buried in a supplementary table. Recounted monthly.