King Trumpet Coffee: Benefits, Evidence, and the Blends That Contain It
Pleurotus eryngii
In one line
King trumpet coffee is coffee blended with Pleurotus eryngii, the king oyster mushroom, included as a source of the antioxidant amino acid ergothioneine. Research has measured ergothioneine intake only in observational diet studies and cholesterol only in animals; there are no human dosing trials, and no brand discloses how much a cup delivers. It is safe as a food.
What this page covers
- What ergothioneine is and why it's marketed
- The state of the human evidence
- Coffees that contain king trumpet
What it does not cover
- Culinary preparation
- Studied for
- Ergothioneine content (dietary antioxidant) · Cholesterol (animal studies)
- Dose in human studies
- No human dosing trials
- Safety
- Safe as food; widely eaten.
Ergothioneine, briefly
Ergothioneine is an amino acid with antioxidant activity that humans can't make and get mostly from mushrooms. King trumpet is one of the richest sources. Population studies associate higher blood ergothioneine with better health outcomes, which is a long way from proving that a pinch of king trumpet powder in coffee does anything.
In coffee
It appears in six-mushroom blends without a stated dose. Neutral ingredient, no credit.
Coffees that contain King Trumpet, and how much
| Brand | Label dose / serving | Part used | Score |
|---|---|---|---|
| RYZE | in 2,000 mg blend | undisclosed | 3.4 |
Frequently asked questions
What does king trumpet do in mushroom coffee?
It contributes ergothioneine, an antioxidant amino acid that humans get mainly from mushrooms. Observational studies link higher ergothioneine intake to lower rates of some chronic diseases, but there is no trial of king trumpet extract in people, and no coffee brand discloses a dose.
Is king trumpet the same as king oyster mushroom?
Yes. King trumpet, king oyster and French horn mushroom are all Pleurotus eryngii, a common culinary mushroom.
Should king trumpet affect which coffee I buy?
No. It's a neutral, safe filler ingredient. Judge the blend on lion's mane and cordyceps doses and on label transparency.
Sources
- Memorial Sloan Kettering — Oyster Mushroom (Pleurotus) — Safety and summary of the limited human evidence for Pleurotus species