Constipation is generally due to -
1. Not eating enough fibre.
2. Not drinking enough water
Rice is a great complex carbohydrate source to use in bulking diets but it is very low in fibre. Make sure to include fibrous vegetables like kale, spinach, celery, etc. into your diet to get your fibre intake.
I would also recommend using a fibre supplement. [FONT=wf_segoe-ui_normal]Psyllium husk is the highest natural food source of soluble fibre you can obtain. The majority of the fibre you intake from your daily diet is insoluble fibre. The key benefit of soluble fibre is that soluble fibre absorbs water in your stomach and creates a gel. It gives your intestines a sort of 'internal scrubbing' as it passes through. It will help keep you regular and the faster you can remove toxins from your body, the less likely they are to be re-absorbed.
I take 10g of psyllium husk before bed each night. [/FONT]