As an expert in skincare and ingredients, I can provide some insights on Neutrogena Lash Serum. However, please note that I cannot provide specific information on the safety of a particular product without reviewing its complete ingredient list and conducting a thorough analysis.

In general, Neutrogena is a reputable brand that has been around for many years. They typically prioritize safety and efficacy when formulating their products. However, it's always important to carefully examine the ingredients in any skincare product, including lash serums.

When considering the safety of a lash serum, it's crucial to look for ingredients that are well-tolerated and have a low risk of causing irritation or adverse reactions. Additionally, some ingredients commonly found in lash serums, such as prostaglandin analogs, have been associated with potential side effects, so it's important to be aware of these risks.

To determine the safety of Neutrogena Lash Serum or any other product, I recommend thoroughly reviewing the ingredient list, researching individual ingredients, and, if necessary, consulting with a dermatologist or healthcare professional for personalized advice.