1500 calories a day may be a weight reduction diet, but it is enough calories. At 300 lbs., it sounds like he needs to lose weight to help both his blood pressure and his breathing. It's not too little fuel for him. He got to 300 lb by eating too much "fuel".
__________________
If you found this advice helpful, please click on the ACCEPT button. I would also appreciate POSITIVE feedback. Bonuses always appreciated.




