Which service should be recommended for a client who is sensitive to smell?

When a client is sensitive to smell, recommending UV hard gel is a suitable choice because it is a more odor-neutral option compared to others. UV hard gel systems generally have less volatile organic compounds (VOCs) than liquid nail products like acrylics or traditional nail polish, which can produce strong odors during application.

Additionally, UV hard gel does not require the use of a liquid monomer that can emit fumes, reducing the overall smell in the salon environment. This makes it a more pleasant experience for clients who might be sensitive to strong scents.

While other products like gel polish have low odor as well, UV hard gel typically has even less of an olfactory impact than other types. Thus, for clients with a sensitivity to smells, UV hard gel stands out as the best option.