After our analysis, we came to the conclusion. Now Foods L-Theanine wins in this comparison and gets 9.8 VSR. Its rival Allergy Research Group Zen receives 2.6 VSR. The gap in rating was affected in the first place by the price, the cost of 1000 mg of L-Theanine of Now Foods L-Theanine is $ 1.15 as against $ 4.5 of Allergy Research Group Zen. One serving of Now Foods L-Theanine contains 200 mg L-Theanine as against 200 mg in one Allergy Research Group Zen serving For a serving of Now Foods L-Theanine you will pay $ 0.23 , and a for a serving of Allergy Research Group Zen you will have to pay $ 0.90.
Now Foods L-Theanine has no taste, the manufacturer makes it unflavored. Allergy Research Group Zen has no taste, the manufacturer makes it unflavored.
Now Foods makes available 4 different sizes of L-Theanine. Allergy Research Group Zen has just one size, 120 Capsule(s).
We recommend buying Now Foods L-Theanine.