Previnex Frequently Asked Questions

If you're looking for a well-rounded starting point, our Optimal Health Pack bundles key supplements together to support overall health at a built-in savings. For more targeted needs, our protein powders, Joint Health PLUS®, Muscle Health PLUS, and Probiotic are consistently among our best sellers. You can explore our full product line to find the right fit for your health goals.

Most Previnex products are free from the most common allergens. Across our entire product line, you'll find no gums, sugar alcohols, preservatives, or artificial flavors. Products like Super Vites® are soy-free, dairy-free, and gluten-free, and free of preservatives, artificial additives, sugar alcohols, and gums. Our protein powders are always soy-free, dairy-free, and gluten-free. However, allergen profiles can vary by product, so we recommend reviewing the supplement facts on each product page to confirm it meets your specific dietary needs.

Yes, Nourify® PLUS is 100% plant-based and vegan with 20+ grams of protein per serving, plus BCAAs, probiotics, and digestive enzymes, all with no dairy, soy, gluten, added sugars, or artificial sweeteners. It's available in both Vanilla and Chocolate and works great as a breakfast replacement, post-workout shake, or smoothie base. Check out our blog for recipes and ideas to get the most out of every scoop.

Absolutely! Our Super Vites® Children's Chewable Multivitamin is specifically formulated for kids ages 2–12 with 28 organic superfruits and vegetables, zero added sugars, and no artificial additives. Like all Previnex products, Super Vites® is pharmaceutical-grade, third-party tested, and free from soy, gluten, dairy, gums, and preservatives. Explore our full kids collection to learn more.

Yes! We’ve designed our supplements to work individually or together as a part of a complete daily routine. Many of our customers pair products like our Multivitamin, Omega Pure PLUS, and Probiotic for comprehensive support, which is exactly why we created bundles like the Optimal Health Pack. For specific usage guidance on any product, you'll find dosing instructions on each product page.

Our experts craft every Previnex product with clinically studied, high-quality ingredients that we’ve sourced specifically for quality and effectiveness. We voluntarily follow the stricter manufacturing and testing standards of the pharmaceutical industry, going far beyond what's required in the supplement industry.

Yes, we test every raw ingredient before it enters production, conduct testing during each production, and test again on the finished product. This clinically studied approach ensures purity, potency, and safety across our entire product line. We’re happy to share finished product Certificates of Analysis upon request.

At Previnex, “pharmaceutical-grade” refers to our internal quality standard that includes rigorous ingredient verification, manufacturing controls, and third-party testing. This includes raw material verification, in-process quality checks, and finished product testing for purity and potency. It’s a higher bar that most supplement brands don’t meet, but it’s our baseline for every product we make.

We source the highest-quality, most bioavailable, and clinically effective ingredients from around the world. We intentionally avoid sourcing from China due to concerns about soil contamination and inconsistent quality controls, instead partnering with suppliers in regions known for exceptional purity and safety standards. Every ingredient is raw material tested before it ever enters production, because where an ingredient comes from is just as important as what it is.

Every product is made with pharmaceutical-grade ingredients and manufactured under pharmaceutical-grade protocols, meaning we follow the more stringent manufacturing standards of the pharmaceutical industry even though we're not required to.

We third-party test for purity and potency, and ensure our products are preservative-free and manufactured right here in the USA. We're also fully compliant with current FDA requirements under the Food Safety Modernization Act (FSMA), and our formulas are backed by industry-leading clinical research. Select products carry additional certifications, including USDA Organic and Kosher. 

Yes! Our Subscribe & Save option gives you 10% off every order with automatic deliveries every 4, 8, or 12 weeks, so you never run out of the supplements you rely on. You can modify, pause, or cancel your subscription at any time. We also offer free shipping on orders of $75 or more.

Managing your Subscribe & Save subscription is easy and fully in your control. Simply log in to your Previnex account and select "My Subscription" to update your delivery frequency, swap products, pause, or cancel at any time. If you need any assistance, our customer care team is happy to help.

Orders placed before 2 pm ET ship the same business day; orders placed after 2 pm ET ship the next business day. For domestic orders, we offer four shipping options: Economy (3–8 business days), Standard (3–5 business days), 2-Day Air, and Next Day Air.

 Free economy shipping is available on all U.S. orders of $75 or more. Once your order ships, you'll receive a confirmation email with tracking information. For full details, visit our Shipping Information page. 

We offer a 30-day, 100% money-back guarantee on all purchases. If you're not satisfied with your purchase, we'll refund your purchase price with no questions asked. The 30-day window starts when you receive your shipment, and you can reach our customer care team at 888-958-0397 or customercare@previnex.com to initiate a return.

Yes! Buying Previnex products in a bundle is one of the best ways to build a complete supplement routine while saving up to 10% compared to purchasing them individually. Our Optimal Health Pack is our most popular bundle, and we also offer guided supplement stacks. Pair any bundle with a subscription to unlock even more savings.

Every time you make a purchase, Previnex donates a bottle of Super Vites® children's vitamins to malnourished children around the world through our partnership with CMMB (Catholic Medical Mission Board). To date, we've donated over 4.6 million bottles across 21+ countries. Learn more about the impact your purchase makes on our Previnex Gives Back page.