Frequently Asked Questions

Previlli® is formulated to go to work right away. You should begin to feel a difference within a week or two! Previlli™ is uniquely structured to balance digestive function and help build healthy gut structure. Many gut health products focus on stabilizing and enhancing the microbes contained in the gut microbiome. Previlli goes further by supporting and sustaining the gut structure, including the lumen environment, cellular barrier function and gut surface area, all while nourishing the microbiome ecology and activating energy and metabolism.

Always read and follow package directions. Previlli™ is designed to promote healthy gut structure with daily use. If you’re unable to take all three capsules with a meal, the daily dose may be split up and taken throughout the day. Do not exceed three capsules per day.  

Yes, the three daily capsules may be carefully pulled apart and the powder sprinkled on food or stirred into a beverage or food. Do not add Previlli™ to hot food or drink.  

Previlli™ should not be given to children under the age of 12. For children between the ages of 12 and 18, consult a health professional before using Previlli™. 

Previlli® may be taken with other dietary supplement products; however, before combining Previlli with prescribed medications, please check with your doctor. 

Many of your questions about Previlli™ are answered here.  You may also contact Previlli™ Customer Care any time at You may also contact Previlli™ Customer Care toll-free at 1-833-PREVILLI (773-8455) Monday through Friday from 8:00 am to 4:00 pm Pacific Time. International inquiries, please call +1-385-250-3153. 

Previlli® should not be used if you are pregnant or nursing.

Yes. Previlli® is vegetarian.

Previlli® does not contain magnesium stearate, stearic acid, or any other filler or binder. Rice bran concentrate and rice extract are the only ingredients added to Previlli, which act as natural manufacturing aids.

Previlli® is available at

None. Previlli® is free of soy, wheat, peanuts, fish, milk, eggs, crustacean shellfish, and tree nuts.

When taken as recommended, Previlli® is not expected to trigger any side effects.

100% Satisfaction Guaranteed. If for any reason you are not delighted by your experience with Previlli®, you may return the product within 120 days from the date of purchase for a full refund. To initiate a return, please send an e-mail to Customer Care at, and include your order number and contact information. Please allow 2-4 weeks for your refund to be processed. 

Previlli™® is manufactured in the USA in an FDA-registered and inspected facility that adheres to all cGMP regulations and is certified-compliant and registered with NSF International.

Each country has its own rules for importing dietary supplements. It is your responsibility to contact your customs office to inquire about the importing regulations of Previlli™ for personal use prior to placing an order. Previlli® will not be liable for packages refused or held for delivery, nor will refunds be issued for such orders, orders seized by Customs, or orders that can’t be delivered due to an address error. Previlli is not responsible for taxes, duties, brokerage and/or fees applied to international shipments. Air Mail costs will be added to all international order totals.

When ordered and shipped within the USA, Previlli® ships the next day (allow extra time if product is ordered on Friday or Saturday) and is shipped via USPS with a 1 to 3-day delivery. Orders placed to ship internationally can take up to 2-3 weeks to arrive at their destination.

No, Previlli® does not contain probiotics. It does contain RhyoTrace™, an organic trace mineral complex; prebiotics, which are substances that feed the naturally-occurring probiotics already in your gut; digestive enzymes, which help to balance digestive function and promote healthy digestion; and a variety of other nutrients, including a proprietary fermented superfood infusion, that are designed to help cultivate lumen environment, fortify barrier function, optimize gut surface area, nourish microbiome ecology, and activate energy and metabolism.*

Previlli® utilizes only the finest ingredients from all over the world. All ingredients in Previlli™ are subject to the same rigorous quality tests for identity, purity, and potency. Only ingredients that meet and exceed the highest of standards are released for use in the Previlli™ formula.

Previlli® should be stored in its original package, under cool, dry conditions. Close the package zipper between uses. Do not store in hot and/or humid conditions.

We are located in Utah at: 1458 East 820 North, Orem, UT 84097.