Specific dietary plants and natural foods, such as Maca, have demonstrated efficacy in clinical and preclinical studies for enhancing libido and improving sexual function.
The claim is specific and falsifiable, passing Step 0. The retrieved literature includes multiple reviews and clinical studies (specifically papers 3, 4, and 7) demonstrating that certain dietary plants and natural food products (like Maca and various traditional medicinal herbs/foods) can improve libido, sexual desire, and erectile function. None of the papers refute this claim. Therefore, the balance of evidence supports the claim.