Home > 5-HTP Nutritional Supplements > Doctors Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg 90 Veggie Caps (DRB-00197)

Doctors Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan

L Theanine Helps Promote A Healthy Mood And A Restful Relaxed State While Maintaining Daytime Alertness, Supports Brain Health L Theanine, Doctors Best L Theanine, Sleep Quality

H&F Rating 405 reviews
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What We Like

  • L-Theanine promotes healthy mood and a relaxed state while maintaining daytime alertness
  • Suntheanine normalize the body stress response and condition the body to handle stressful situations better
  • Ideal to reduce the negative effects of caffeine


  • may cause headache

Results of our analysis:

We analyzed 39,778 reviews for 92 products in the 5-HTP Nutritional Supplements category.

We then analyzed 405 reviews for this product. Of these, 9 reviews were recent.

Around 74% of reviews were positive and about 20% were negative.

Final Score:

8.43 out of 10, based on these factors:

  • Easy to swallow
  • Effectiveness
  • Ingredients quality
  • Overall satisfaction
  • Packaging
  • Portion size
  • Smell
  • Taste
  • Value for money
  • What buyers say about Doctors Best L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan

    I have been using L-theanine from GNC for the past two weeks and it has made me feel a lot better about my health and well-being, even though I get anxious when I get to work in 35 minutes, but it is still good for me.

    I take this supplement to keep the benefits of caffeine intact, even though it makes me anxious and on edge when I take Adderall for ADD.

    I wish I'd heard about L- Theanine sooner, I've handed out quite a bit of cash on numerous brands of the high dollar L- Theanine capsule on Amazon.

    I take one in the morning, afternoon, and evening, and then one in the middle of the night if I can't sleep, but it seems to relieve symptoms of not sleeping, which in my case is what I find with one in the middle of the night.

    I have trouble with coffee but I am happy with the all-in-one tablets, they only contain caffeine, which I was happy with after doing my research.

    Common Questions


    Both seem to do the same thing, so how do you choose between them?


    L-theanine has an effect on the brain very quickly, whereas 5-HTP effects seretonin in the brain.


    Has anyone taken Suntheanine by opening the capsule and adding to liquid?


    My daughter decided to try it with her child with special needs, since she can't swallow pills.


    I would prefer it if it came from the USA.


    Doctor's Best products are manufactured in the U.S. using highly qualified cGMP manufacturers and raw material ingredients.


    I've been taking this for a couple weeks and not noticing a difference, so am wondering if it takes a while to see a difference.


    I noticed a difference immediately, being much more alert and alive, when I took the 150 mg of suntheanine.


    Does this product have any corn in it?


    I find this product most useful for tension because it has Microcrystallie cellulose, modified cellulose and vegetarian capsule.

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