Nootropics Index - Save on smarter supplements
Home/FAQ/What is tolerance?
Safety & sourcing

What is tolerance?

Last updated June 14, 2026

Tolerance means a person may notice a weaker response to a substance after repeated use. It does not happen with every ingredient, and it does not happen the same way for everyone.

Tolerance is one reason cautious users track what they take, avoid unnecessary combinations and pay attention to sleep, mood and energy. If unwanted effects appear, stop and seek appropriate guidance.

Ready to compare prices?Search any compound and sort by per-unit price.
Open the index
Was this answer helpful?
No votes yet
Back to all questions