Which of these is NOT a claim that indicates a product is most likely fraudulent?

The claim that a product should "be used only as directed" is not indicative of fraud; rather, it reflects a standard guideline for safe and effective product use. This type of disclaimer is common in many products, especially in health-related contexts, where proper usage is crucial to achieving the desired effects and minimizing risks.

In contrast, claims such as "Approved by leading experts" can sometimes lack transparency regarding who those experts are and the rigor of their evaluation. "Contains no harmful ingredients" can sound reassuring, but without specific definitions or regulations, it can be misleading. Similarly, stating that a product "works for everyone" is highly suspect since individual responses can vary greatly based on many factors like genetics, health conditions, and environmental influences. Overall, the first claim promotes safe usage without making exaggerated or broad assertions about efficacy.