Short answer: You can return the bottles even if they are empty. That detail matters: it means you can complete a full 30-day trial, decide it is not for you, and still get your money back.
Why this detail is called out as genuinely significant
A guarantee that only covers unopened product is not a guarantee at all — this direct, pointed statement highlights why the empty-bottle policy matters so much in practice.
What the refund process specifically involves
Contact official support inside the 60-day window, follow the returns instructions, keep proof of postage — refund processed within 48 hours of the return being received.
💡 Worth knowing: refund amount is less shipping and handling — worth understanding this specific detail before assuming a full, unconditional refund.