Nature's Sunshine guarantees purity and quality, but not performance of its products. If after purchasing a Nature's Sunshine product and using it for up to 3 months, a customer determines it to be unsatisfactory, the customer should return it to their Nature's Sunshine Associate with a copy of the original invoice for replacement, credit towards another purchase, or a refund. This guarantee applies only to products that have not been misused, intentionally damaged, discontinued or outdated.