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Mercer Caffeine + L-Theanine
Mercer Caffeine + L-Theanine
Mercer Caffeine + L-Theanine
Mercer Caffeine + L-Theanine

Caffeine 100mg + L-Theanine

$9.99

Caffeine + L-Theanine supplements significantly improve performance, accuracy, and speed on cognitively demanding tasks. The synergistic effect of Caffeine and L-Theanine means improved energy, focus, and awareness.

Mercer’s Caffeine 100mg + L-Theanine provides natural focus and energy stimulant. Caffeine from Guarana is more potent than coffee beans, and as a stimulant, tends to increase dopamine levels which boosts concentration, energy, and focus. While L-Theanine (naturally occurring in green tea) has been found to enhance attention significantly.

Plus, B vitamins and Folic, essential for brain function, mental focus, and positive mood.

CAFFEINE 100mg + L-THEANINE 50mg are in just the right amounts to synergize perfectly, making their effect more powerful in improving mental focus and boosting energy.


Our Quality & Money Back Guarantee 
All Mercer Men's Goods products are manufactured in the USA at an FDA inspected cGMP compliant and 3rd party rated facility.

We stand by our products and offer a 100% Satisfaction Guarantee (including shipping costs) for up to one bottle of Caffeine 100mg + L-Theanine per customer.

Suggested use 
As a dietary supplement, take 1 mL daily in water or juice or as recommended by your qualified healthcare professional. Do not take on an empty stomach.

 

Reviews

Quality First and Last

We only offer products we believe in and take ourselves. We're not trying to "change the world" - just doing what we can to make it a little bit more pleasant.

Proudly USA

We are proud to partner exclusively with manufacturers located in California and Texas to manufacture our entire product line.

We Listen

We are always looking for recommendations and feedback on our products. Drop us a line and let us know what you think!

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Free Returns

Let's be honest - stuff looks different online than it does in person. That's why we offer express delivery and free returns.

Customer Reviews
3.4 Based on 5 Reviews
5 ★
60% 
3
4 ★
0% 
0
3 ★
0% 
0
2 ★
0% 
0
1 ★
40% 
2
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Filter Reviews:
A
12/08/2023
Adam SVG verified by SHOP
United States United States

Not arrived

A
12/03/2023
Amanda SVG verified by SHOP
United States United States

This is one of the best caffeine supplements out there if you want to get some additional nutrients in. I don't get the heart flutters or the crash from this product. I'm a woman and I know it's for "men" but they don't really make one like this for us. I have ordered many times off of Amazon and now directly from their website. It's been a great experience every time!

AL
12/13/2022
Adam L.
Australia Australia

It never arrived

Poor I was told 7/10 business day for international shipping It’s been 3 plus weeks

AM
08/23/2022
ARNALDO M.
United States United States

I didn't use it yet

KC
05/25/2022
KCLois C.
United States United States

Good job Mercer!

potent but smooth - excellent blend - will buy again - thank you!