Weight loss for my wife

Hi I am actually writing this question. On behalf of my wife. She is 29 just gave birth 9 months ago to our first child. She is looking to drop 20 lbs but has had trouble finding the best program and supplements.any suggestions? she is on her feet constantly with work. She is active but looking for that extra something to help. She has been looking into garcinia cambogia as she doesn't like thermogenic or any caffinated fat loss shops. Please any info would be great ! Thank you!