There were so many “fun” diet trends back in the day, right? Celery Juice. Snackwells. Slimfast. Jenny Craig. MediFast. NutriSystem. NonFat LowFat NoSugar LowSugar LowCarb NoSalt. The Master Cleanse. Special K Cereal Diet! South Beach. Atkins. Keto. Gluten Free. Paleo. Keto. Whole 30! Remember those...