Jack and diets
Jack has attempted various diets over the years, often with limited to zero results. Jack's dieting often begins with him pontificating about the importance of healthy eating and exercise. He tells us that he knows what's healthy and what isn't- he just chooses to eat large quantities of fat, grease and salt and could totally stop any time he wants.
This is typically followed by progressively more frequent substitutions on food and avoidance of exercise until the diet is never seen or heard from again.
P90X

In March of 2012 Jack took it upon himself to attempt to loose weight using the P90X workout. A notoriously rigorous and intense physical workout regimen. Unsurprisingly, Jack quickly tired of it as he was mostly unable to do the exercises properly or often enough to see any form of real result. He stopped updating us on his progress after about thirteen weeks during which he showed barely any physical change.
Profile by Sanford
Jack attempted a diet in 2021 called Profile by Sanford; a diet plan program that provides meal plans for weight loss goals. It's unlikely that Jack hit any of his goals however because he filmed himself eating large amounts of fast food during this time.
Keto

In June of 2018 Jack suffered a stroke that cost him the use of his right arm. In response Jack began claiming that he was turning a new leaf and vowed to eat healthier. To achieve this, Jack chose to adopt the ketogenic diet, a nutritional plan characterized by low carbohydrate intake and a focus on eating low-fat meat and vegetables. 'Keto' in Jacks mind, however, means a small amount of vegetables stuffed with carbs and cheese as exemplified in the image.
Carnivore
On 1 January 2024 Jack began his carnivore diet, siting Joe Rogan as an inspiration. Jack claims that vegetables are poison, and vows to never eat another vegetable ever again.
Okragate
In late January of 2024 Jack uploaded a photo of his meal showing a side of fried okra on his plate. When it was pointed out that he ordered a deadly vegetable (one that was fried no less- completely incompatible with a carnivore diet) Jack insisted that the okra was eaten by Tammy.
It is the official opinion of this wiki, however, that this is further prof of Jack cheating on another diet.