Shea Moisture Yucca & Baobab Thickening Growth Milk 8 OZ Our Sulfate-free shampoo helps increase the density and thickness of hair while preventing breakage. Hair is fuller and healthier. Our Thickening Shampoo has 3 key ingredients Baobab Oil - Contains Vitamins A,C,D,E and F to fortify and strengthen hair. Yucca - Thickens hair while adding volume. Biotin - A powerful B vitamin that strengthens the hair follicle.