Grow Long Super-Fast Strength Leave-In Conditioner: With Caffeine, Ginseng, and Vitamin E, this Leave-In Conditioner from Marc Anthony detangles, smooths frizz, and gives hair the strength it needs to help reduce split ends and breakage. 8.4 fl oz. Long Hair, Don’t Care: Achieve perfect lengths without limits with Marc Anthony’s Grow Long collection. Moisturizing, anti-breakage formulas blended with Caffeine and Ginseng. For stronger, longer, healthier looking hair, go strong and Grow Long. This product does not grow new hair.