Short answer: Thirty days lets you check that the capsule agrees with you. Bacopa's memory effect typically emerges later, at 8 to 12 weeks — that part is not fully covered by the guarantee.
Why this distinction is stated with unusual directness
Covers tolerance, not full effect — a genuinely honest acknowledgment that a 30-day window can't fully validate a formula whose best ingredient needs 8-12 weeks.
Why the guarantee is still described as customer-friendly despite this gap
Empty bottles are accepted — you do not need to return unused product to qualify — one of the more customer-friendly terms in this category, even with the timing limitation.
💡 Worth knowing: confirm the clock-start date and any processing fee before you order — a direct, practical instruction worth following.