Could this be malabsorbtion or just ibs? had colonoscopy last year normal have ibs almost everyday no weightloss low on phosperous level

Yes Possibly: Although malabsorption is less likely later in life. I would suggest thinking about acquired food allergy or intolerances instead as a more likely possiblity. This often leads to ibs like symptoms. Most common food intolerances are dairy and wheat. Other ones are nuts, shellfish. Try eliminating one food group in your diet at a time and see if this helps your symptoms. A sl low phosporous may be o.

Any symptoms: If there are no additional symptoms than what you have been experiencing and there is no weight loss, no anemia, malabsorption is unlikely. Have a healthy diet, exercise 30 minutes/day, drink plenty of water, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/.