I’m no expert, but as far as I know it’s in the “technically possible but so unlikely that it’s a ridiculous defense” category.
Like when then-superstar of cycling Alberto Contador* tested positive for the main indicator of blood transfusion doping and blamed eating a rare steak 🤦😄
*I love that his name sounds super cool in the original Spanish, but if you translate it to English he’s “Albert (the) Accountant” 😂