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Home » Mu Li – Oyster Shell – Concha Ostreae

Mu Li – Oyster Shell – Concha Ostreae

Mu Li

English Name: oyster shell

Pharmaceutical Name: Concha Ostreae

Medica Category: Liver-Calming and Wind-Extinguishing Herbs

Properties: Mu Li enters the Liver and Kidney channels; it is salty and astringent in nature and cool in temperature.

What is Mu Li?:

The Chinese Herb Mu Li is crushed oyster shell of one of three species of oyster (Ostrea gigas (Thunb.); O. talienwhanensis (Crosse.), which are found in coastal waters off Northern China, or (O. rivularis (Gould), which is found all along the entire coast of China. For use as medicine, the oyster shells are cleaned and then smashed/crushed into quite small pieces. The pieces can either be used unprocessed, be dipped in vinegar and baked , or be heated at a high temperature (i.e. calcined) before decoction.

Traditional Chinese Medicine (TCM) Therapeutic Actions of Mu Li:

Mu Li (unprocessed) is heavy and sinking in nature and benefits deficient Liver yin to help anchor Liver yang rising. Clinical manifestations of Liver yang rising addressed by this herb include: irritability, short temper, insomnia, palpitations, red/flushed face, headaches/increased pressure in the eyes, dizziness, and vertigo.

Mu Li (vinegar-dipped) treats hot phlegm that has hardened into palpable masses/nodules. Clinically, it is used to address various kinds of lumps/palpable masses (such as scrofula and goiter).

Mu Li (calcined) prevents/astringes leakage of body fluids due to deficiency. Clinical presentations of this include nightsweats, spontaneous sweating, spermatorrhea, vaginal discharge, and enuresis.

Mu Li (calcined) contains several derivatives of calcium and is used in its calcined, powdered form to neutralize stomach acid, relieve pain, and stop bleeding. It is used to address cases of Stomach fire, which are characterized by acid regurgitations, duodenal/peptic ulcers, stomach pain, and sour breath.

–safety/clinical notes:

Contraindicated in patients with damp-heat or excess conditions (due to its astringent properties).

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Customer Reviews

Based on 34 reviews







Pit Bull Mom

Minimizes the bleeding

I’m using Dissolve Mass with Yunnan Baiyao and bleeding is intermittent. My dog has bladder cancer and not a “bleeding” cancer but the tumor does produce blood. Once I added Disolve Mass the blood discharge stopped and is now infrequent. I’ve been using it for several months and will continue to do so.


Katherine Quinn

Dissolve Mass

I’m taking this extract

daily.The mass is the same but I am continuing to use this and I will be ordering more.Thank you so much.



Was hopeful, but did not appear to work for my dog

My dog had a rapidly growing mass so I tried this product. She is only 3 lbs I gave her .25 ml 3 times a day, every single day for around a month. The mass was maybe the size of a golf ball when we started the product however it continued to grow rapidly with no signs of shrinking. Ultimately it got so big surgery became the safest and fastest way to relieve my baby of that mass. I really really wanted this to work…. but unfortunately I cannot say that it did. For additional reference my dogs mass was just under the skin not attached to anything under her skin and located on her abdomen. It grow to about the size of a tennis ball (a little bigger actually) which was bigger than her head. After getting it aspirated they were only able to tell me it showed signs of being a cyst that was made of tissue and only pockets of fluid but was non cancerous. We Ultimately got it surgically removed. She is currently being a good girl and recovering very well . Once removed they weighted the mass and it was 1 lb that’s almost half the weight of my dog.

The product gets 3 stars because it shipped fast and I’m grateful that this formula is avaliable because I’m sure it will help someone. Maybe it tried to help but couldn’t beat the rapidly growing cells… Idk