Amsterdam Truffles

Microdosing Sport kit

€35 €39

Microdosing Activity Kit

SAVE 10% buying this bundle!

This kit is intended for those looking to*

✔ Improve respiratory functioning

✔ Boost energy levels 

✔ Reduce fatigue 

✔ Help muscle recovery 

✔ Increase immune strength

✔ Optimize cognitive functioning

This kit contains:

  • 10 +1 free microdoses in a bamboo jar
  • 60 Cordyceps mushroom capsules 

How to use this kit:

Dosing truffles: With this kit you receive pre-measured 1 gram doses that are best taken on an empty stomach, see why here. Keep in mind each person has a different tolerance to psilocybin; a very important concept to consider when it comes to microdosing, The “standard” micro-dose is 1 gram, but for some this dose may be noticeable at a psychoactive level (not the intention when undertaking a microdosing routine) or it may not be enough. It is important to find your sweet spot; find the quantity that works best for you- curious how to do this? Check out this page on tips, tricks, and precautions. 

If you don’t know your micro-dosing sweet spot we recommend taking your first 1 gram micro-dose on a free day and seeing what happens, if you feel that your perceptions are slightly altered then remember to reduce the quantity for the next micro-dose.  It can be reassuring to know, you would need to take at least 7 grams to have a mild psychedelic effect.

Cordyceps capsules: We recommend taking two capsules daily with food.

Routine: We reccomend following the the Doctor Fadiman protocol in which you take a microdose every 3 days, as shown below:


This is a recommended protocol as it helps to lower the rate at which you build a tolerance- meaning you can microdose for longer without having to have a reset. With this protocol you can microdose for 6-8 weeks, after which it is recommended to have at least a two week break to give the brain and body enough time to reset to a baseline tolerance.

For step by step instructions on microdosing, click here

Storing the microdoses: Our microdoses are carefully weighed, and packed as 1 gram each. Keep in mind they are still fresh, you can safely store them in your fridge for 6-8 weeks (usually even longer). Because the truffle is a fresh product and needs oxygen to stay at its best, we do not sell vacuum-seal truffles in order to keep them fresh and of a higher quality for you. It can happen that a white fluff / mold does grow on the truffles. This white fluff is completely harmless and actually healthy, it is simply new mycelium that is trying to regrow the truffle. Mycelium is actually very healthy - it contains all the essential amino acids. It also includes a sufficient supply of fiber, B vitamins, Zinc, and low cholesterol content.

 *Disclaimer: The information provided is for educational and informational purposes only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition. This kit contains psilocybin, which is a controlled substance in many countries and can have potential risks and side effects. It is advised that microdosing should only be undertaken after consulting with a healthcare professional and ensuring it is legal in your country. The cordyceps capsules may also have potential risks and side effects, and should not be used to replace any prescribed medication or treatment. Use of this kit is at your own risk and When Nature Calls BV is not responsible for any adverse effects or consequences from using it.


The power of our functional mushrooms lie in the pure, unprocessed, vegan and directly from the original source. The source where wisdom about mushrooms is born. Un spoilt, age -old forests of China. In the middle of these forests there are traditional mushroom farms where the art of growing generations has been perfected and passed on.

The farms are far away from factories, cities and contaminated air. Free with an optimal climate, clean air and soil.

The old methods of traditional Chinese medicine applied and respected.

Everything starts with the breeding of the mushroom, the basis of our functional mushrooms. Depending on the mushroom, a type of wood or natural breeding ground is chosen that meets the needs of the mushroom.

 After the mushrooms have reached their maximum potential, they are harvested and immediately dried. Drying is completely natural due to the exposure to sunlight or (for sensitive mushrooms) in a drying oven, so that the temperature can be controlled perfectly. To light these dry ovens, they use the mushroom nutrient nutritional soils used. This way nothing is lost and the quality remains guaranteed.

After the drying process, all mushrooms are checked by hand. Only the best mushrooms end up in the next phase in which they are processed into a supplement.

After the mushrooms are completely dried, they are ground toVery fine powder. This forms the basis for the further process, to the mushroom an easily absorbable together statement. The fine powder is processed into an extract through hot water extraction. An extract is many times more concentrated than powder. They contain a higher concentration of polysaccharides. This process can take up to five to seven hours. The heat used during the production process is increased the Bio availability, vital substances are released from the mushroom, which means that it takes less effort for the body to absorb the extract.

High bio-availability due to the slow growth of the fruiting body

In our products you will find nothing that is not natural. No chemicals, pesticides to speed up growth or synthetic odor, colors and flavors or preservatives.

The breeding ground for the breeding of the mushrooms is only used once. When the mushrooms have grown, they have absorbed all important nutrients from the soil. For the next party, a "fresh" composite natural breeding ground is used again. This bottom is again full of nutrients The residual material of the old breeding ground is not lost. This is used for combustion in the dry ovens. In this way nothing is lost to produce as sustainably as possible.



Sinensis, Dong-Chongxiacou (Chin.), Het Knowukaso (Japan), Yartsagunbu (Tibet).

His shape, that special growth and its origin: Cordyceps is an outsider under the medicinal mushrooms. Originally this mushroom occurs in the highlands of Tibet, Nepal and China where this medicinal mushroom can yield up to 8000 US $ per kilo. Due to its special properties and high demand, this mushroom is now grown on a large scale in a conditioned environment.

In China, Cordyceps is through a lot of top sport uses to increase performance: for example, the Chinese team made an impression Knowing display at the 1992 Olympic Games. Several world records were broken. It was immediately thought of the use of forbidden steroids, but it soon became apparent that Cordyceps Sinensis was the key to the success. Cordyceps is honored as an all-round adaptogen rich in Cordycepin. It is well known for increasing your oxygen uptake and energy levels. It can help with fatigue and boost your physical performance.


Within Traditional Chinese Medicine (TCM), the use of the Cordyceps has a long and intense history.

Cordyceps is also known as a libido stimuli, both in men and women. In addition, Cordyceps has an enhancing effect on the quality of the male sex hormones and on the sperm. In addition, scientifically proven that Cordyceps raised fertility in women

✔ Fatigue
✔ Libidating and improves male and female fertility
✔ Improvement of oxygen intake and lungFunction (Sports Performance)

Usage: 1-3 times a day 2 capsules for or after the meal. Not exceed recommended daily dosage. Do not use during pregnancy or breastfeeding.

Content: 60 capsules. Nutritional value per 2 Capsules 640mg Cordyceps Extract (Cordyceps Militaris) Full spectrum biomass of 100% fruit body, concentrated extract (9: 1) thanks to hot-water extraction (contains at least 30% polysaccharides)

Ingredients: Ingredients; Cordyceps (Cordyceps Militaris) Extract and Vegetable Cellulose Capsules (Hydroxypropylmethyl Cellulose)




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