"The Mind Silencer"
Levo-Tetrahydropalmatine (L­-THP) is the active compound found in the Corydalis Yanhusuo herb, endemic to China. There are numerous L-THP benefits that people are talking about today. In China, L-THP is marketed and sold as an anti-stress and pain-relieving compound and is sometimes called Yan Hu Suo.
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This supplement is not approved by the Therapeutic Goods Administration (TGA). The information provided herein is not medical advice and should not be construed as such. This product is intended solely for use by individuals within the United States. Always consult with a healthcare professional before starting any new supplement regimen.
How to use


L-THP is used primarily for its ability to help reduce feelings of stress, to improve mood status, and sometimes for its ability to reduce sensations of pain. In China, L-THP is used for reducing symptoms of pain and as a muscle-relaxant and is sold under the name Rotundine. L-THP is also a powerful anti-inflammatory compound, meaning that it may help to promote good health.


  • L-tetrahydropalmatine reduces nicotine self-administration and reinstatement in rats, thereby indicating powerful anti-addiction properties (1).
  • Four weeks of l-THP treatment significantly ameliorated the severity of PAWS—specifically, somatic syndrome, mood states, insomnia, and drug craving, in comparison to a placebo group, in terms of drug addiction (2).
  • L-Tetrahydropalmatine reduces the development of anxiety and depression-related symptoms induced by single prolonged stress (3).
  • L-THP exerts anxiolytic effects via potential interaction with the benzodiazepine binding site on the gamma-aminobutyric acid (GABAA) receptor (4).


  • L-THP exerts a prominent anti-inflammatory agent induced by lipopolysaccharide (5).
  • L-THP has been used for the treatment of headache and other mild pain. However, little is known about its analgesic effect on chronic pain and its mechanism. It was reported that L-THP exerts remarkable antihyperalgesic effects on neuropathic and inflammatory pain in animal models (6).


  • L-THP has been reported to attenuate PTSD-induced changes in gene expression, such as those involving DA, serotonin, and acetylcholine, in the amygdala and hippocampus (7).
  • L-THP works as a powerful cardio-protective supplement, helping to prevent damage to the heart under a variety of stresses (8).

How to use



Take one capule, 30-60 minutes before sleep



Need to find the right dose for you? Consider coaching.

Dosing strategy:

This produt deliers very rapid effects. Best cycled.

Ideal for:

Stressed individuals, Sleep, Overexcitation.


All vendors are vetted for quality, to ensure they contain the right active ingredients and ratios. Each vendor provides a Certificate of Analysis ℹ️, to ensure accurate dosing, and a product free of contaminants/heavy metals. Further, when brands we work with have been randomly pulled off the shelf and tested by Labdoor, they have tended to score A+ ℹ️.


Before listing products, we compile a list of available research, to determine if claims match the evidence. Likewise, we scour the the internet to gauge people’s experience with each product. Most of the products listed typically score at least [4.5/5 from reviews]. All the studies we’ve found are listed at the bottom of the page, under citations.


All products listed on the BYB website follow screening before listing, to ensure there’s a history of long-term usage without adverse effects. Many products fall under the FDA’s Generally Recognized as Safe (GRAS) guidelines.

Medication interactions and allergies

Please consult your healthcare professional before making any changes to your lifestyle or regime.

For further information on contraindications and allergies, please visit the vendors website.

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L-THP acts as a unique way to quieten the mind, improve sleep efficiency and overall calmness. This is very potent and fast acting.

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This formuia encompasses a wide range of anxiolytics and sedatives that induce a very profound deep sleep. No tolerance noticed.

Lucas, BYB founder