The LockIn Blog

#exam prep

Evidence-first writing on focus, attention and high-stakes work from the LockIn team. No hype, every claim sourced.

19 October 2026 · 3 min read

Caffeine for JEE, UPSC and CAT Prep: How to Time It Without Wrecking Your Sleep

How exam aspirants should use caffeine: timing, dose, cut-off hours, exam-day rules and what to do if you're under 18. Practical and evidence-based.