The premium nutrition provided in the new EFS is redefining the limits of nutrition so athletes can redefine their endurance limits.

The new EFS-PRO drink mix contains a special carbohydrate source that has a significantly lower osmolality than any other carbohydrate available.

Includes 2 New & Improved OptygenHP.

The new OptygenHP formula features an exclusive OptyMax Proprietary Matrix. Clinical studies showed a 23% improvement in endurance capacity and a significant increase in energy (ATP) production.

Ultragen's breakthrough technology is designed to work synergistically to provide the right nutrients to the right place at the right time during the 30-minute window of Opportunity following exercise so you can recover faster than ever before.