Which action would best counteract nutritional quackery encountered in an online ad?

Immediately share the ad widely to expose it to more people who might buy the product and thereby strengthen its market position.

Assume all online health ads are accurate because advertising is regulated strictly by scientific bodies.

Verify the original research in peer-reviewed sources, check funding and conflicts of interest, and favor recommendations from credentialed professionals like RDNs rather than ad claims.

Contact the ad author on social media and accept their personal testimonial as equivalent to peer-reviewed evidence.