Does practising yoga help you lose weight?

Don't lose weight, focus on being healthier. Also, yoga isn't a "quick fix", but a mindset where mindfulness is central. Maybe change your relationship with food instead of looking for things to "make you lose weight". How? By being mindful of how you treat your body. Are you using its potential by working out and challenging it enough? Are you nurturing your body with the nutrients it needs to meet those challenges? Are you feeding your soul by indulging in foods that are the exactly useful but make you happy, in moderation? Are you in control of what happens to your body with your mind, of is your body shutting your mind off instead? To lose weight, first find the cause of your weight gain. To be healthy, figure out what that means to you
Then, turn to yoga with your intensions in mind. Best wishes!