Fiber: can it be combined with vitamins and medications?

Dietary fiber has powerful absorbing properties, so it can affect the absorption of certain medications and vitamin-mineral complexes. Fiber is capable of binding active substances and excreting them from the body before they have time to be absorbed into the bloodstream. This reduces the effectiveness of drug therapy and can reduce the benefit of taking expensive supplements to zero.

People who take hormonal medications, blood thinners, antibiotics, and iron-containing complexes need to be especially careful. Plant fibers slow down peristalsis and the absorption process in the GI tract, which changes the pharmacokinetics of many drugs. If you have increased the amount of bran or psyllium supplements in your diet, be sure to consult your attending physician.

To avoid negative interaction, it is recommended to maintain a time interval. The golden rule of pharmacology states: the interval between taking medications or vitamins and consuming a large amount of fiber must be at least two hours. In this case, the drugs will have time to pass through the upper parts of the GI tract and be absorbed into the blood in the required volume, and the fibers will do their job later.

If you use pharmacy supplements with pure fiber, space out their intake from vitamins as far apart as possible. For example, the vitamin complex can be taken in the morning on an empty stomach or with a light breakfast, while the fiber supplement can be moved to the evening or lunch. This approach allows you to get the maximum benefit from healthy eating without compromising the course of treatment.