Versus: Leave-In Conditioner for Heat-Protected Hair (Frizz-Free & Low Maintenance) In the quest for sleek, frizz-free hair that survives heat styling sessions, two contenders stand out: a Hydrating Hair Serum infused with keratin, biotin, castor oil, and rosemary oil, and the John Frieda Frizz Ease Daily Nourishment Leave-In Conditioner, packed with vitamins A, C, E, and green tea extract. Each offers a distinct approach to taming unruly strands while safeguarding against heat damage. The first product, a 5 oz serum, blends nourishing oils with keratin to create a protective barrier against high temperatures, ideal for those who frequent curling irons or straighteners. Its rich formula targets dryness and frizz, leaving hair deeply hydrated and smooth with a subtle shine. However, its thicker consistency may require careful application to avoid weighing down shorter styles. Meanwhile, the 8 oz John Frieda leave-in conditioner leans into lightweight hydration, designed for daily use without the fuss of heavy layers. Its vitamin-infused blend works to detangle, reduce breakage, and combat frizz with a gentle, non-greasy touch. While it may not offer the same intense moisture as the serum, it excels in simplicity-perfect for a low-maintenance routine that balances protection and convenience. The serum's natural oils (castor and rosemary) hint at a spa-like ritual, while the conditioner's focus on vitamins and green tea suggests a modern, science-backed formula. Both prioritize frizz control, yet their textures and intensity levels cater to different needs: one for deep repair, the other for everyday upkeep. For those prioritizing intensive conditioning, the serum's multifaceted approach might be a winner. But if you crave a versatile, no-fuss solution, the John Frieda conditioner proves its worth. Either way, the battle for frizz-free, heat-protected hair hinges on the perfect blend of care and convenience.