Only 5 of 19 reishi supplements held what their label claimed
Nineteen batches of reishi bought in the United States were assayed for the compounds their labels claimed. Nothing equivalent has ever been published for lion's mane.
What the study found
Five of nineteen reishi supplements matched their own labels
Nineteen batches of reishi supplements bought in the United States were assayed for the compounds their labels claimed. Five matched. Nothing equivalent has ever been published for lion's mane, so this is the closest measurement of whether a mushroom supplement holds what it says.
The caveat · 19 batches, sampling undescribed
This is reishi, a different fungus, and no lion's mane product was in the sample. Nineteen batches is small, the sampling method is undescribed, and 'matched the label' means matched by these analysts' own chemical criteria, which another method would score differently. The data predate 2017.
What we don't know
This is reishi, a different fungus, and no lion's mane product was in the sample. Nineteen batches is small, the sampling method is undescribed, and 'matched the label' means matched by these analysts' own chemical criteria, which another method would score differently. The data predate 2017.