How much karo syrup can an adult take for constipation?

While I use this in infants for constipation, I don't suggest it for adults. Kids don't absorb the majority of the complex sugars, so it works to draw along water. Adults absorb the sugars, so it is less a benefit & is stored as carbs or fat. Metamucil in its brand or generic form is a better adult/older kid agent. Directions are on the product.

You may take a fiber laxative like Metamucil and drink enough water daily so that your urine is colorless. For the long term you may try to increase your intake of fiber foods. Consult this site for fiber foods. http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/high-fiber-foods/art-20050948 Wish you good health!