Common challenges faced during weight loss journeys often include issues like lack of motivation, emotional eating, and plateaus in progress. Individuals may struggle to maintain consistency in their diet and can easily revert to old habits, especially when facing stress or emotional turmoil. Additionally, unrealistic expectations can lead to disappointment when results don't match efforts. It’s crucial to approach weight loss with a sustainable mindset, focusing on long-term goals rather than quick fixes to overcome these challenges.