NATURAL STACKS Smart Caffeine Pills - 100mg Caffeine + 200mg L-Theanine Supplement - Supports Energy and Focus - No Jitters and No Crash - 60 Capsules
NATURAL STACKS Smart Caffeine Pills - 100mg Caffeine + 200mg L-Theanine Supplement - Supports Energy and Focus - No Jitters and No Crash - 60 Capsules
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Natural Stacks

NATURAL STACKS Smart Caffeine Pills - 100mg Caffeine + 200mg L-Theanine Supplement - Supports Energy and Focus - No Jitters and No Crash - 60 Capsules

Key item features

  • ALERT FOCUS AND PRODUCTIVITY: Take this Smart Caffeine Supplement with L-theanine for when you need alert focus and long lasting energy. We blended 100 mg of the purest form of Natural Caffeine with 200mg mg of L-Theanine from Green Tea to get the best of both worlds.
  • NO JITTERS OR CAFFEINE CRASH: Unlike the 200mg caffeine pills that make you jittery and anxious, Smart Caffeine is a calm and smooth energy pill. No more staying up late, wired up from your last cup of coffee too many.
  • START YOUR DAY OFF STRONG: Add Smart Caffeine to your morning routine or anytime of day as a study aid, pre-workout or whenever your energy needs a lift. Perfect as a coffee or energy drink replacement.
  • HEALTHY AND SAFE: Our all natural ingredients are Non-GMO, gluten free, and vegan. Every ingredient can be traced directly to trusted suppliers.
  • Natural Stacks has earned the trust of thousands of customers with our innovative products and open source transparency program. No more “proprietary blends”, we believe in optimizing your performance without compromising on ingredient quality.
Current price is $19.95
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4.228070175438597 stars out of 5, based on 58 seller reviews(4.2)
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Customer ratings & reviews

4.6 out of 5 stars
stars234 ratings217 reviews
How item rating is calculated
4.9
5.0
4.7
4.5
4.5
2.9
  1. 5 stars74% (172)
  2. 4 stars18% (41)
  3. 3 stars6% (14)
  4. 2 stars1% (2)
  5. 1 star2% (5)

Reviews summary

Pros

  • : Provides hours of sustained energy without crash.
  • : Provides sustained energy without crash or jitters.
  • : Helps maintain a calm and alert state without jitters.
  • : Provides energy without a crash or letdown.
  • : Helps stay focused without side effects.

Neutral

  • : Can be a good value for some, but feels overpriced to others.
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Showing 1-3 of 217 reviews

Sep 16, 2024
iHerb customer
5 out of 5 stars review

Convenient

I love the convenience of this, and it gets me feeling awake but in a subtle and non-jittery way. I read that coffee and matcha can inhibit iron absorption so I've been trying not to have them around the time I supplement on iron or have iron rich meals, so if I'm feeling tired but got stuff to do and caffeine is needed around the time of iron intake, then this is the perfect solution!

Incentivized Review
Review from iherb.com
Helpful?7AJ8MI16D5MR989453397
Aug 26, 2024
iHerb customer
5 out of 5 stars review

Smart Caffeine

Smart caffeine is great. It helps me feel energized and focused at work. For me it seems to last about 6 hrs and kinda wears off. No crash though. The Theanine is perfect with it. Just feel in a good positive mood, not jittery. Small capsule so easy to take. I really like the benefits, helps get me through the day feeling good even when I don't sleep well.

Incentivized Review
Review from iherb.com
Helpful?7AJ8MI16D5MR989453397
Aug 3, 2024
iHerb Customer
5 out of 5 stars review

Very effective

I'm a night shift worker that can't drink coffee. These capsules are amazing. I take one and hour before I start work and it gets me through the whole shift.

Incentivized Review
Review from iherb.com
Helpful?7AJ8MI16D5MR989453397