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Caffeine & L-Theanine - 60 Servings

Caffeine & L-Theanine - 60 Servings

NutraBio Caffeine & L-Theanine is a caffeine and L-Theanine supplement that delivers 150 mg of caffeine and 200 mg of L-Theanine in one capsule, formulated for smooth energy and sustained focus without the jitters, the edge, or the crash.‡

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Caffeine & L-Theanine - 60 Servings
$17.99
$17.99
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Made in the USA • Third-Party Tested • Fully Transparent Labels • Fully Dosed Formulas

NutraBio Caffeine & L-Theanine is a caffeine and L-Theanine supplement that delivers 150 mg of caffeine and 200 mg of L-Theanine in one capsule, formulated for smooth energy and sustained focus without the jitters, the edge, or the crash.‡

Description

How To Use

Key Ingredients

Dietary Restrictions

Delivery & Returns

SKU: 29086
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Smooth Energy. Sharp Focus. Crash Free

Energy should feel good the entire time it lasts, not just for the first thirty minutes. That takes more than a big caffeine number, which is why the 150 mg per capsule comes from two forms: Caffeine Anhydrous USP for the immediate lift and Infinergy™ Di-Caffeine Malate, a patented ingredient buffered with malic acid, for a more gradual release that sits easier on the stomach. Paired with a full 200 mg serving of L-Theanine, this is a formula designed around how caffeine should feel, not just how much of it fits in a capsule.

150mg
Caffeine Per Serving
200mg
L-Theanine Per Serving
2
Caffeine Sources
Zero
Fillers & Excipients

The Science-Backed Edge

Every ingredient is chosen with purpose and backed by science to deliver meaningful results. Whether it’s wellness or performance, each formula is fully dosed and built with innovation to help your body function at its highest potential.

Live Without Compromise

We are dedicated to helping you achieve real results by ensuring every product is made with the highest-quality ingredients and uncompromising standards. Our commitment to excellence is built to help you reach your potential and live without compromise.
  • Black and white icon of a battery with a lightning bolt in the center, surrounded by two circular arrows forming a loop, representing battery recharge or renewable energy.

    Smooth, Even Energy

    The lift comes on gradually instead of all at once. You feel awake and ready to go, not wired and restless.‡

  • A bold black hexagon with a circle in the center, surrounded by a hexagonal outline. Four thick arrows extend outward from the hexagon in the up, down, left, and right directions.

    Sustained Focus

    Attention that holds through a long block of work or a full training session. Not just the first twenty minutes.‡

  • A black and white icon with three hexagons forming a honeycomb shape in the center, a thick downward arrow on the left, and a thick upward arrow on the right.

    No Jitters

    L-Theanine balances the tension caffeine alone can create. You get the alertness without the shaky, anxious edge.‡

  • A black silhouette of a person sitting with arms raised, surrounded by angular shapes resembling stylized spikes or rays, all outlined in white.

    No Afternoon Crash

    The energy tapers off gradually rather than dropping out from under you. No 3 p.m. collapse and no third cup of coffee to fix it.‡

  • A bold, black geometric arrow forms an abstract, zigzag shape resembling a winding path or stylized snake, pointing upward with a white outline for contrast.

    Easy on Your Stomach

    The buffered caffeine in this formula is gentler on the gut than a strong cup of coffee. Take it first thing in the morning or before training without the churn.‡

  • A black and white shield-shaped icon with a stylized wheat stalk inside and a diagonal line crossing it, symbolizing gluten-free or no wheat.

    Zero Sugar, Zero Calories

    A full 150 mg of caffeine in one capsule with no sugar, no artificial sweeteners, and no calories. The energy from an energy drink without everything else in the can.

Smooth Energy and Focus Support, From the First Hour to the Last

Energy Without the Jitters

Caffeine on its own can leave you feeling wired, restless, and unable to settle into anything. L-Theanine is included here at a full 200 mg serving to balance that tension, so the energy shows up as alertness instead of agitation. You feel switched on and steady at the same time.‡

Focus That Lasts for Hours

The pairing of caffeine and L-Theanine has been studied for its role in supporting sustained attention and mental clarity. That means a head that stays clear through a long block of work, a full training session, or an afternoon that would normally get away from you, rather than a sharp burst of focus that fades after twenty minutes.‡

No Crash When It Wears Off

Half of the caffeine in this formula comes from Infinergy™ Di-Caffeine Malate, a buffered form that releases more gradually than standard caffeine. The energy comes down slowly instead of dropping out from under you, so there is no 3 p.m. collapse, no second dose to get through the rest of the day, and no wrecked evening as the price of a productive morning.‡

Overall rating: 4.75 / 5 from 8 reviews.

AI Generated Review Summary

Summary topics

Review topics: [energy, supplement, label].

Review highlights

Reviews

CaffPlus Review

"CaffPlus includes 200mg of L-theanine, 75mg yield of Di-caffeine malate (slower release caffeine), and 75mg yield of Purcaf caffeine. This supplement gives a nice smooth boost of energy that last a couple hours. Great supplement for sustained energy without the jitters."

— John A. (5/5)

Better than just caffeine

"This new variation of the old caffeine supplement seems to work much better for me. It certainly is easier on the stomach and seems to be longer lasting. If you use caffeine pills, give this a try."

— Sisson (5/5)

Really great

"They are exactly as advertised. No spike, no crash, really great."

— Robert P. (5/5)

Awesome product!

"When I need a boost!"

— Bryson B. (5/5)

Low smooth tier energy

"Low smooth tier energy. No rush currently pair it with 2-4 grams of ltyrosine going to add choline next. Some days it leave me looking for more of a kick. Overall happy. I appreciate the basic label. I perfer the most basic label a company can produce in order to keep cost down"

— Matt S. (4/5)

perfect

"such a good caffeine supplement- start our mornings with this supp and it does the job without the crash of coffee"

— Alysha F. (5/5)

Caffplus

"Like it because I don't get the jitters like plain caffeine."

— JoAnn R. (5/5)

Out of all the caffeine

"Out of all the caffeine products I tried, this is the best so far. No crash feeling, and energy level lasts a good while. Much better than straight caffeine caps"

— Anonymous (4/5)

Q&A

Frequently Asked Questions

What does taking caffeine and L-Theanine together do?

L-Theanine is an amino acid found naturally in green tea that has been studied for its role in supporting alpha wave activity in the brain, the state associated with relaxed and focused attention. When taken alongside caffeine, it is commonly used to support the alertness and focus caffeine provides while smoothing out the restlessness or edginess that caffeine alone can create. NutraBio Caffeine & L-Theanine combines both in a single capsule at 150 mg of caffeine and 200 mg of L-Theanine.

How much caffeine is in NutraBio Caffeine & L-Theanine?

Each capsule contains 150 mg of caffeine, which is roughly the amount in a medium cup of coffee. That 150 mg comes from two sources: 75 mg from Caffeine Anhydrous USP and 75 mg yielded from 100 mg of Infinergy Di-Caffeine Malate. One bottle contains 60 capsules. Do not consume more than 2 servings daily.

What is the best ratio of L-Theanine to caffeine?

Most research on the pairing uses ratios between 1 to 1 and 2 to 1 of L-Theanine to caffeine. NutraBio Caffeine & L-Theanine uses a 1.33 to 1 ratio, delivering 200 mg of L-Theanine for every 150 mg of caffeine, so both ingredients are present at a full serving rather than one being included at a token amount.

Will caffeine and L-Theanine cause jitters or a crash?

This formula is built specifically to reduce both. The L-Theanine is included to help balance the tension caffeine can create, and half of the caffeine comes from Infinergy Di-Caffeine Malate, a buffered form that releases more gradually than standard caffeine and is easier on the stomach. The result is energy that comes on evenly and tapers gradually rather than dropping off sharply. Individuals sensitive to caffeine should not use this product.

When should I take caffeine and L-Theanine?

Take 1 capsule 1 to 2 times daily, as needed, with or without food. Most people take it in the morning in place of a first cup of coffee, or 30 to 45 minutes before training or a long block of focused work. Because each serving contains 150 mg of caffeine, avoid taking it within 6 to 8 hours of bedtime. Do not exceed 2 servings daily.