Maksym Tykhonchuk on Instagram: "1. Professor Mark Anderson and his team spent 20 years observing over 15,000 dog owners. The discovery was shocking: dogs treat depression more effectively than antidepressants. People with dogs have 35% higher serotonin, 50% higher oxytocin, and 40% lower cortisol levels. All that without a single pill. 2. “Dogs are living antidepressants with no side effects.” A person with depression isolates themselves, but a dog forces them to go outside, move, and interact.