Yes. Diet Coke is allowed, in restricted amounts, on the slow carb diet.
You are allowed up to 16 ounces of Diet Coke per day.
Get Even Better Results on the Slow Carb Diet
In The 4 Hour Body, best selling author Tim Ferriss reveals the incredible results he achieved by combining four ingredients well-known for their fat loss or cholesterol-altering effects.Slow Carb Diet Supplements »