The per-bottle price drops sharply as bundle size rises here — worth doing the actual math rather than assuming the smallest bundle is automatically the safer test.
The 2-bottle starter bundle runs $79 per bottle ($158 total) plus shipping. The 6-bottle bundle brings that down to $49 per bottle ($294 total) with free US shipping included — a real difference, not a rounding error.
Since the 60-day guarantee still applies regardless of bundle size, a larger order doesn't mean larger financial risk — it means a lower per-bottle cost if you're already planning to commit to the full trial period.
60-day money-back guarantee, per the manufacturer.