Should You Take Metamucil Before Or After Meals?

Our pharmacist answers the latest question regarding whether or not your should take Metamucil before or after a meal.


Should Metamucil be taken before or after meals?

Asked by Bernard On Sep 28, 2017

Answered by
Medical Content Reviewed By PharmacistAnswers Staff

On Sep 28, 2017

The directions for Metamucil (Psyllium) fiber don't indicate a preference for dosing before or after meals. People can feel free to take it either way.


Having said that, any type of fiber tends to have a effect on the feeling of satiety (fullness) for people taking it. Multiple studies have shown that dosing fiber BEFORE a meal can significantly reduce the amount of food one consumes during their next meal. In addition, fiber can slow the digestion of food, reducing blood glucose levels and cholesterol as well. Due to these reasons, I usually do recommend taking fiber supplements before meals as you may get more of a health benefit out of it.


It is important to take Metamucil  at least 2 hours before or 2 hours after other oral medications. It's also recommended to take the fiber with at least 8 ounces of fluid and to drink another glass of water after consumption of the dose.

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Dr. Brian Staiger Pharm.D

Dr. Brian Staiger is a licensed pharmacist in New York State and the founder of He graduated from the University At Buffalo with a Doctor of Pharmacy degree in 2010. He has been featured in numerous publications including the Huffington Post as well as a variety of health and pharmacy-related blogs. Please feel free to reach out to him directly if you have any inquiries or want to connect! He's answered thousands of medication and pharmacy-related questions and he's ready to answer yours! Office: 716-389-3076

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