Since this formula's own reported guarantee is calculated from your purchase date, your order confirmation email is worth keeping accessible from day one.
Your order number, the purchase date, the exact package and price you paid, and any correspondence with customer support — including any written ingredient confirmation you requested.
Given this site's own documented ingredient-list uncertainty, saving any written confirmation from customer support alongside your order details gives you a specific record to reference if questions come up later.
Every order is reported to be covered by the 60-day money-back guarantee.
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