What hair product is best to use for creating defined curls?

Using gel is optimal for creating defined curls due to its formulation, which typically includes ingredients that provide hold and structure. Gel works by coating the hair strands, which helps in clumping curls together and maintaining their shape throughout the day. The hold that gel offers can enhance curl definition, reduce frizz, and enable the curls to withstand humidity and other environmental factors. When applied to damp hair, gel can help to lock in moisture while allowing the natural curl pattern to form without becoming weighed down or stiff.

In contrast, smoothing serums are designed to reduce frizz and enhance shine rather than provide hold for curly hairstyles. Hair spray serves primarily as a finishing product meant to set styles in place, but it does not inherently help in defining curls during the styling process. Conditioner is essential for maintaining healthy hair and can help with detangling and moisture, but it lacks the fixing properties required for curl definition. Therefore, gel stands out as the best option for achieving precisely defined curls.