How should a barber handle a client with a known allergy to certain hair products?

The most appropriate action for a barber when handling a client with a known allergy to certain hair products is to use allergy-free or hypoallergenic products. Hypoallergenic products are specifically formulated to reduce the likelihood of an allergic reaction. These products have fewer allergens and irritants compared to standard formulations, making them safer options for clients who have sensitivities.

Using fragrance-free products might be beneficial for clients with sensitivities; however, it does not guarantee that the product will be free of other allergens that may trigger a reaction. Therefore, while a fragrance-free option can be part of a safe approach, it does not fully address all concerns related to allergies.

Using more product to ensure safety is not an effective strategy and could potentially exacerbate the situation. This could lead to increased exposure to allergens rather than reducing it.

Consulting with the product manufacturer may provide valuable information, but it doesn't directly resolve the immediate need for a suitable product for the client in question. The best course of action is to proactively choose hypoallergenic products that are designed to minimize allergic reactions.