Hey, I'm 235 lbs at 5'4" and I am trying to get down to 190lbs and I'm 43yrs old. What would be my best approach? I'm a big fan, I have been following your website since the 1990's.
What I suggest is keeping your protein intake high, while lowering your fat and carbohydrate intake. Get your protein from lower fat and easily digestible sources, like egg white and fish. And get your low fat and low sugar carbohydrates from complex sources like fresh raw vegetables, rice, potatoes and oat meal.
Most importantly make sure you up your cardio exercise to boost your metabolism.
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Haven't been on on this page for some 15 years so like the prodigal son I have returned!
A bodybuilding diet shouldn't vary due to you being over 40. The principals are still the same regardless of age. If you are trying to put on muscle then high protein around 1.5 g per your weight - ie if you are 230 pounds 200 * 1.5 of protein daily with some carbs to provide a energy source.
If you are bulking you have to run your body at a calorie surplus.
Cutting - cut out the cards and run your body at a calorie deficit.