libido · Outcome
Morning-erection frequency — a vascular and hormonal signal.
How to measure:
Three levers, one stack. Each works through a different mechanism. They compound.
+11% IIEF
2000-5000 IU daily
Effect size
Corpus
406 papers
range -4.3–100 · n=10 quantitative claims
“A combined supplement containing whey protein, vitamin D3, and vitamin E increases serum vitamin D3 levels in sarcopenic older adults compared to placebo.”
No corpus-backed pick yet
We require at least 3 corpus papers for a habit to surface here. The literature on this outcome × pillar is still being extracted.
No corpus-backed pick yet
We require at least 3 corpus papers for a food to surface here. The literature on this outcome × pillar is still being extracted.
Everything we found, ranked by how strongly we recommend it. Tap any to see the studies.
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Every pick has two signals. They answer different questions and we never bundle them into one number.
Effect size
How big is the change on morning erections, in the units that matter for this outcome.
Confidence
How sure are we the effect is real for morning erections, given the studies we have.
For every pick, the “papers” number is how many studies we've cataloged that test this entity for morning erections. “Favorable” means the study reported the direction you want.
The tier badge (S, A, B…) on the entity itself is its overall research confidence across all outcomes. It's the same letter wherever you see this entity on the site, not specific to morning erections.
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