Sodaryn is sold with a 60-day money-back guarantee from your purchase date, per the brand's stated terms.
Contact Sodaryn's official customer support directly — not this website — with your order number, within the 60-day window from your purchase date.
Calendar your deadline the day your order arrives, and keep all bottles and your packing slip until you have decided. This is the single most practical thing you can do to protect your guarantee.