Transfer Factor™ by 4Life™ Research is extracted from the colostrum of our own herd of Grade A dairy cows. 4Life™ has licensed the patent which identifies transfer factor in colostrum and the exclusive and proprietary method for extracting transfer factor from colostrum (US Patent 4,816,563). Each batch of 4Life™ Transfer Factor™ is tested to ensure transfer factor quality and activity.

For more information, please call Product Support at , e-mail at productsupport@4-life.com. or fax to (801) 562-3699.

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