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- Pour
- Stir
- Enjoy
Cool Slumber | Herbal Support for Hot, Restless Sleep
~ Inspired by Emperor of Heaven’s Elixir | Tian Wang Bu Xin Dan
Sixteen Herbs in this Formulai
Cool Slumber is for the physically restless and overheated sleeper, who tosses and turns through the night, leaving them agitated and unsettled the next morning. Inspired by the classic Chinese herbal medicine formula Emperor of Heaven Elixir (Tian Wang Bu Xin Dan), this natural, non-habit forming sleep formula is designed to calm and cool the body during the night, delivering peaceful rest and more energy the next day. Used for hundreds of years, we’ve modernized it for a night of quality sleep you’ve never dreamed of.
Cool Slumber is great for:
- Those who sleep hot in the night
- The physically restless sleeper who tosses and turns
- Those who experience evening agitation before bed
- Women in the menopause phase of their lives
- Establishing a quality, un-interrupted sleep pattern
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Quality Assured
Enticing Flavors
Sustainable
Easy & Convenient
Rigorous Testing Processes
Manufactured & Tested in the U.S.
Cool Slumber by DAO Labs, part of our Sleep Remedy Series, combines 16 powerful herbs with a refreshing blackberry and clove flavor combination that helps one maintain cool, quality sleep throughout the night (not just fall to sleep). Cool Slumber helps those who “sleep hot”, providing a natural solution for cooler, more peaceful sleep.
The formula is inspired by the powerful Chinese herbal combination Emperor of Heaven Elixir (Tian Wang Bu Xin Dan), used for a variety of needs and benefits beyond just helping deliver uninterrupted rest. Unlike other sleep solutions, Cool Slumber helps you stay asleep - not just fall asleep.
If you find your sleep disrupted throughout the night due to physical agitation, feeling twitchy and restless, and generally a bit too hot under the covers, then this is the formula for you. By embracing the herbs in this formula, the restless, hot sleeper will experience calmer, cooler sleep with refreshed energy and better mental clarity in the day ahead - much like it has helped people for hundreds of years.
It’s not melatonin, rather Cool Slumber is a non-habit forming herbal powder that mixes easily with water and can be taken both before bed to transition naturally and calmly to sleep, and during the day as well (if necessary) helping reinforce a better sleep pattern in the nights that follow.
Cool Slumber comes in a bulk container with approximately 30 servings for a month of blissful sleep.
When Cool Slumber Works Best
Cool Slumber is taken approximately 1-2 times daily to help establish a stronger sleep pattern and naturally cool the body. Some will experience the benefits by taking a single serving approximately an hour before bed, while others will need to augment with a serving during the day. In addition, the benefits of Cool Slumber extend far beyond better sleep, providing gentle, cooler relaxation and stronger mental clarity during the day as well.
The formula is especially suited for:
- Those who sleep hot throughout the night
- When melatonin just isn’t cutting it
- People who find themselves physically agitated throughout the day and into the night
- Beneficial for women in the menopause phase of their lives.
How to take Cool Slumber | Herbal Support for Hot, Restless Sleep
- 1. Pour
- 2. Stir
- 3. Enjoy
Cool Slumber is typically taken approximately one hour before bed to help the mind and body transition naturally to sleep. For those in need of advanced sleep assistance, an added dose can be taken during the day as well (in most cases, it will not make you fall asleep). Simply add a scoop of the powdered herbs to water, stir and enjoy a blissful night of rest.
The Formula
Cool Slumber is inspired by the 12 herbs found in Emperor of Heaven Elixir (Tian Wang Bu Xin Dan), a powerful, non-habit forming combination of herbs that have been used to help cool the body and calm the mind for hundreds of years.
The Herbs
Purity, authenticity and sustainability are the pillars of DAO Labs, which translates into how we develop our formulas. Cool Slumber is inspired by the classic Chinese herbal combination Emperor of Heaven Elixir. Used for hundreds of years, we’ve improved upon this classic formula by incorporating flavor and convenience, while never compromising the heritage and power of this amazing practice.
All herbs are sourced in Asia but third-party tested in the U.S. for both safety and authenticity, setting a new standard for in Chinese herbal medicine.
Learn more about the sixteen herbs in Cool Slumber | Herbal Support for Hot, Restless Sleep below.
Suan Zao Ren – Ziziphus spinosa
Sweet, sour, and neutral. Nourishing Heart yin and Liver Blood, sour jujube seeds are one of the most important Chinese herbal medicinals for better sleep.
Bai Zi Ren – Biota orientalis
Sweet and neutral. Known for calming the spirit, arborvitae seeds are used almost exclusively for sleep and associated needs such as irritability, forgetfulness, and keeping cool.
Dang Gui – Angelica sinensis
Sweet, pungent, and warm. Dang Gui is famous for supplementing the Blood and gently moving help the body in areas it needs it most. It is one of the most commonly used herbs for supporting women’s health.
Tian Men Dong – Asparagus cochinchinensis
Part of the asparagus family, Tian Men Dong produces dense roots that “nourish Kidney yin and clear Lung fire” and is commonly used to support the body for a variety of needs.
Mai Men Dong – Ophiopogon japonicas
The tubers of this species of monkeygrass are a very most important “yin supplementing” medicinal. It is used for lung and certain digestive support, and to clear heat and irritability from the Heart to improve sleep.
Sheng Di Huang – Rehmannia glutinosa
Sweet, bitter, and cold. Fresh Rehmannia root is a widely used in Chinese herbal medicine to “clear heat, cool the Blood, and nourish yin.” It helps the body recover from damage to yin and fluids caused by heat.
Ren Shen –Panax ginseng
Sweet, slightly bitter, and slightly warm. Ginseng root is famous for strongly supplementing qi to support both the lungs and digestion. It also “calms the spirit” for better sleep, anxiousness, and for mental clarity.
Dan Shen – Salvia miltiorrhiza
Bitter and slightly cold. Salvia root is a very important herbal medicinal for “activating the Blood and breaking up Blood stasis.” It is commonly used to support women’s health. But it also “clear heats and reduces irritability” making excellent for better sleep and restlessness.
Xuan Shen – Scrophularia ningpoensis
Salty, sweet, bitter, and cold. Scrophularia is used to “clear heat, cool the Blood, and nourish yin.” It also soften hardness.
Fu Ling - Poria cocos
Sweet, bland, and neutral. Poria is a fungus from the polyporaceae family, used to support digestion by “leaching out dampness and strengthening the Spleen.”
Wu Wei Zi - Schisandra chenensis
Sour and warm. Called “five flavored seed” in Chinese, tasting schinsandra is surprising experience. It’s dominant sour flavor is what allows it to retain all kinds of leakages, from sweating to other essential fluids. It also calms the spirit and aids sleep.
Jie Geng – Platycodon grandiflorum
Bitter, pungent, and neutral. Platycodon root is commonly used to support the lungs and throat. Doctors also use it to help bring the effects of other herbs to the upper body.
Yuan Zhi - Polygala tenuifolia
Pungent, bitter, and slightly warm. Yuan Zhi is widely used in sleep formulas and is known for calming the Heart, settling the spirit, and dispelling phlegm.
Bai Bu – Stemonia sessilifolia
Sweet, bitter, and neutral. When treated with honey, stemonia root is a powerful medicinal for treating all sorts of coughs. In its untreated form, it is effective in external applications against lice and pinworms.
Shi Chang Pu - Acorus gramineus
Pungent and warm. The roots and stems of Sweet Flag “open the orifices” with their powerful, penetrating aroma. Sweet Flag is used to dissolve phlegm to promote sleep and improve digestion.
Du Zhong - Eucommia ulmoides
Sweet and warm. The bark of eucommia tree is an important herb in Chinese medicine to treat broken bones and tendon injuries, prevent miscarriages, alleviate low back pain, and treat erectile dysfunction.
- Pour
- Stir
- Enjoy
Dr. Karchmer on Tian Wang Bu Xin Dan & Cool Slumber
Dr. Karchmer on Tian Wang Bu Xin Dan & Cool Slumber
“Cool Slumber is an herbal formula that I use regularly for those who are agitated, seem to toss and turn in the night, and find themselves sleeping hot. But like many herbal formulas in Chinese medicine, the versatility of this formula is so much greater - it’s an excellent formula for an older population, especially women in the menopause phase of their lives.”
Read More About Cool Slumber From DR. KARCHMER
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No need to count sheep!
“My sleep has improved dramatically. I used to wake around 3:00 each morning and I was awake for at least 2 hours before I could fall asleep again. No more counting sheep. I drink Cool Slumber every night and I sleep through the night. I love that the mixture is very drinkable.”
Verified Cool Slumber | Herbal Support for Hot, Restless Sleep Enthusiast
- Customer Reviews
- Product Q & A
5
★★★★★★★★★★ Based on 8 reviews
★★★★★★★★★★ Jeremy A.
on 07/28/2026 Verified Buyer
Great Product
Works as advertised, helps me fall asleep easier and wake less in the night.
★★★★★★★★★★ Anonymous
on 07/05/2026 Verified Buyer
Insomnia + Grief
I’ve had insomnia for over a decade and typically use a variation of “stacked” medications, one to help me fall asleep, and another to help me stay asleep. As I age, I’ve wanted to cut down on medications due to their side effects. After a lot of research I decided to try Dao Labs cool slumber and I am absolutely shocked at how effective it is for me. No other supplement has worked this well for me! Recently, my insomnia had gotten worse with the loss of my older brother; a busy mind and deep sadness kept me awake for days. I pulled this baby out of my cupboard again and started prioritizing my night routine to make sure I take this before bed. Without fail, I’ve been sleeping so well given the circumstances. I am a customer for life!
★★★★★★★★★★ Anonymous
on 06/16/2026 Verified Buyer
Review of Cool Slumber
This product is excellent. I am sleeping like a baby and can feel so much cooler at night.
★★★★★★★★★★ Anonymous
on 06/16/2026 Verified Buyer
Review of Cool Slumber
This product is excellent. I am sleeping like a baby and can feel so much cooler at night.
★★★★★★★★★★ Anonymous
on 05/19/2026 Verified Buyer
Powerful stuff that workds
I had the hardest time staying asleep. Then I found this through a friend and it’s a gawechanger. Seriously.
★★★★★★★★★★ Anonymous
on 04/17/2026 Verified Buyer
Try It. You will sleep
This stuff is incredible. Truly! Give it a try if you’re waking up in the middle of the night.
★★★★★★★★★★ Trina M.
on 04/14/2026 Verified Buyer
Works
I was skeptical if it would work, but it does. I am very happy with the product and has an interesting flavor.
★★★★★★★★★★ Aldene F.
on 04/04/2026 Verified Buyer
Helps with sleep and with energy
Cool Slumber helps with a life-long problem of sleep, and it gives me a boost of energy in the morning. I am much clearer during the day than without it.
Have a question about this formula? Contact our team.
Learn More About Cool Slumber | Herbal Support for Hot, Restless Sleep
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