When dealing with an eyelash product, what is essential to check for safety and effectiveness?

Checking the expiration date of the product is essential for ensuring safety and effectiveness. Many cosmetic products, including eyelash products, can degrade over time, leading to potential safety issues such as irritation or allergic reactions. An expired product may not perform as intended due to the breakdown of active ingredients or preservatives, which could compromise its effectiveness and overall safety for use.

In contrast, while product reviews can offer some insights into user experiences, they do not guarantee the safety of a product as they may not systematically assess its formulation before use. Similarly, comparative pricing with competitors could indicate market trends or popularity, but it does not inherently reflect the quality or safety of the product. Lastly, the social media presence of the manufacturer may highlight their marketing efforts but is not a reliable source for evaluating product safety or effectiveness. Thus, confirming the expiration date is a critical step in ensuring the integrity of an eyelash product prior to its application.