Optimum Nutrition Coupons & Promo Codes

In your shopping cart there will be a section labeled 'PROMOTIONAL CODE' right under your order summary. Enter your code there, click apply & your order will be discounted appropriately.

Get 15% off your first order when you sign up to the Optimum Nutrition newsletter.

Optimum Nutrition offers free delivery for any orders over $40. Place your Standard order at any time and you will receive it within 3-8 business days.

The merchandise must be received by ON within 30 days of your purchase, no returns will be accepted after this time period. You will be asked to provide your Purchase Order number as received when an order was placed on the Site. Once they determine that your merchandise is eligible for return, you will be issued a Return Authorization Number and given instructions on how to complete the process.

You may contact Optimum Nutrition via phone at 1-800-705-5226, Monday - Friday: 8.30 am -5.00 pm CST or via email at oncustsuppus@optimumnutrition.com.