In just shy of one year -- he didn't start losing weight until December of 2012 -- Irwin went from 300 pounds to 170. How did he do it?

 

"95% of it was done through nothing but a 1350 calorie limit per day," he wrote on Reddit. "No foods were off limit, but I survived mostly on tuna salad, chicken with salsa, frozen¹ vegetables, beans and rice, turkey/roast beef sandwiches, spinach²（菠菜）, and eggs. After I lost 100 pounds I started walking to work (5 miles) for about 2 months until it got too cold outside."

 

Here's the best part -- during the entire year, Irwin didn't mention anything to his parents. Not a word. So imagine their reaction when they saw him for the first time. Or better yet, watch it:

 

Only his sister was in on it. She's the one who filmed the unveiling.

 

When asked if he likes his new clothing options, the 5-foot-8 Irwin responded, "Yes I do, and it's very strange having 'how does it look?' be a criteria³ instead of just 'does it fit?' "

 

And he's not done yet. His goal weight is 150 pounds.

 

"The best part has definitely⁴ been the reactions of co workers and friends," he wrote. "I have people asking me for advice on almost a daily basis now, and I've seriously considered making it a career path (dietitian)."

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