ProHealth has been providing quality, science-based supplements since 1988.

We can return your product within 100 days for a full-refund of the product cost. For additional information regarding our return policy, please visit the Return Policy page.

We offer same day shipping on orders placed before 1PM PST. For more information, please visit the Shipping Information page.

Yes, we treat affiliates as partners. For more information about this program, please visit the Affiliate Program page.  

Our Nutrition Advisor Program is available at no charge.  

Our program is currently available Monday-Friday, 8AM-5PM PST. You are able to leave a message with an advisor outside of business hours and we will answer your question the next business day.

Customer service is available by phone Monday-Friday, 8AM-5PM PST.

You can email our Customer Service team at CustomerLoyalty@ProHealth.com or visit our Customer Service page.

Compared to 'generic' supplements that contain ingredients to prevent vitamin deficiencies, longevity supplements target cellular pathways that directly impact how we age, supporting both health span (the number of years you’re healthy) and lifespan (the number of years you’re alive). They target at the cellular level to help replace certain nutrients depleted through the aging process and boost the production of various nutrients to slow down pathways that impact aging.

Supplements that support longevity, like anything related to nutrition, should be highly personalized to your specific health goals. Longevity supplements can be grouped into the following categories based on how they target cellular pathways within the body: antioxidants, metabolic regulators, caloric restriction mimetics, NAD+ precursors, NAD+ boosters, sirtuin activators, senolytics, steroids and hormones. For personalized recommendations, we suggest connecting with one of our Nutrition Advisors through our free nutrition service.  

The best vitamins for longevity are dependent upon your health goals. However, the B vitamins, vitamin C and vitamin D have strong longevity-promoting profiles. At ProHealth, we have a variety of formulations that include vitamins and additional minerals, antioxidants, etc to help tackle all aspects of age-related concerns over the age of 40.  

Compared to other companies, all of our supplements are formulated with research-supported ingredients and dosages. All products are manufactured in FDA-registered, GMP-compliant facilities. Additionally, each product is third-party tested, with Certificate of Analysis’ available on our website to verify that they’re of the highest quality, purity and potency.  

Chronological-age reversal (the number of years you’ve been on this planet) is not possible. Biological-age reversal (how old your cells are) is possible. ProHealth’s NMN is the only NMN in the world proven to reverse biological age by 12 years in a double-blind, placebo-controlled, peer-reviewed, published, clinical trial.