Description
- Balanced Combination: Each serving of Nutricost Caffeine with L-Theanine delivers 100 mg of caffeine and 100 mg of L-theanine, providing a harmonious blend of these two ingredients.
- Versatile Use: Nutricost Caffeine with L-Theanine can be easily incorporated into your daily routine, whether you need a boost of energy, enhanced focus, or a sense of calm and relaxation.
- Abundant Supply: The 240 capsules in each bottle offer a total of 240 servings, ensuring you have an ample supply of this beneficial supplement.
- High-Quality Manufacturing: This product is manufactured in an NSF certified and GMP compliant facility, ensuring the highest standards of quality and purity.
- Rigorous Testing: To guarantee the integrity of the product, each batch undergoes independent testing by third-party, ISO accredited laboratories.






LouisArm –
This supplement was a game-changer for my FL License exam—I passed without any issues. It enhances focus and recall, which made a huge difference in my performance. Unlike other products, this one really works. It has no strange side effects, and although I’m usually sensitive to caffeine, this doesn’t bother me at all, unlike a cup of coffee. It simply keeps you awake and prepared to tackle any mentally demanding tasks.
jagendra –
Feels great I do notice a difference compared to drinking coffee/energy drinks. I believe the L-theanine is a great addition together. Benefits of the pill are portability and less need to drink fluids means less time going to the bathroom.
Margie Birds –
Helpful in cutting my addiction to caffeinated, full-sugar sodas. For me, this combination helps reduce sleepiness, clarify thoughts and reduce anxiety. I started taking several a day and have gradually reduced the number. Now I try to get the l-Theanine from natural foods. Occasionally I take these capsules when I need help to stay alert for driving. Otherwise, I try to sleep when I need rest rather than rely on caffeine and sugar.
Phantom-X –
The product is clearly a good value for the money. The caffeine offers energy and the l-theanine offers relaxation.
The problem is that the ratio is 1:1. You get 100mg of caffeine and 100mg of l-theanine. I would prefer a lower dose of caffeine (maybe 50mg) and a higher dose of l-theanine (200mg). Or maybe 100mg caffeine and 400mg of l-theanine.
Why? I wish it had more of a relaxing effect overall. I often have coffee in the morning. Often, I only want a little pick me up in the afternoon. This works fine but it would be nice to have an even more mellowed out energy delivery.
I’ll update this review if my opinion changes.
TracyJuly –
Gives me long lasting energy. No shakes or jitters. I just take one and it’s enough to help me feel alert for 3 to 4 hours.
Joseph –
I like that this is only 100mg, as a lot of the other options seem to be 200mg, which can tend to be a bit much.
Very solid energy from these, not jittery at all, no troubles sleeping so I would assume the dosage is as described.
On sale when I purchased, and at $10 it’s MUCH cheaper than the energy drinks I was drinking before.
CactusGrunt –
I like how it is 100mg caffeine. Most raw caffeine you get in the pharmacy section is 200mg, which is okay too but sometimes it’s too much or you want to control it. The l-theanine really does seem to control any jitteriness too. I take it when I need a pick me up at work instead of coffee or a monster and also before I go to the gym I will take one along with a drink made of pure creatine and beta-alanine instead of some random brand of preworkout. It’s just the right amount of energy and pump you need to hit your heavy weights early and then not having your heart rate up for the rest of your workout. Can’t beat the value on it, especially if you compare it to the same caffeine you’d get from buying coffee or energy drinks everyday.
Alicia –
I only saw one other reviewer say this, but they were right. These don’t dissolve well. They seem to aggravate my acid reflux, and I get stuff coming back up into my esophagus about 30 minutes after taking this. Also, I know others have said they don’t experience a caffeine crash as this wears off, but I do. It leaves me with a nasty headache. I personally don’t recommend this.