Frizz occurs when the hair's outer layer is dry and absorbs moisture from the air. To prevent frizz, focus on hydrating hair with moisturizing shampoos and conditioners, and sealing the cuticle with anti-frizz serums or oils.

The best approach involves a combination of hydration and sealing. Use moisturizing hair products and follow with a leave-in conditioner, hair oil, or serum designed to smooth the hair cuticle and block humidity.

There is no single 'best' product, as effectiveness varies depending on hair type and frizz cause. Look for products containing ingredients like argan oil, shea butter, or silicones, which help to smooth the hair shaft and lock in moisture.

Curly hair is naturally prone to dryness, making it susceptible to frizz. Use a sulfate-free shampoo and hydrating conditioner, and define curls with a moisturizing curl cream or gel while hair is still damp to lock in moisture and definition.