What does collagen do? How does Ultherapy stimulate the creation of collagen?

Collagen is a natural protein that gives skin its youthfulness by keeping it firm and toned.⁷ As we age, collagen breaks down, and the result is a loss of skin strength and elasticity.⁷ Ultherapy uses microfocused ultrasound to generate a thermal effect under the skin.^1,2,4,8 The thermal effect essentially jump-starts a process that produces fresh, new collagen.^3,8