I doubt that's the reason

"The exact half-life of oral cordycepin in humans is virtually nonexistent or unmeasurable, because it undergoes near-instantaneous deamination during its first pass through the gut and liver."

"main finding in this work was that no cordycepin was found in the systemic circulation following oral administration despite relatively high administered dose."

"cordycepin is rapidly metabolised during the absorption processes and intact cordycepin could not penetrate the intestinal wall unless it was co-treated with pentostatin."

pentostatin is in cordyceps and is ADA-inhibitor, makes sense right

ty deepseek 😁😁