Humanidad is a healing center focused on the therapeutic use of entheogens and master plants to treat physical, mental and spiritual conditions. The blend of Ayurvedic, Amazonian and Western medicine makes the healing center one of a kind, rescuing the best of all worlds to provide a unique solution for each participant. 

We offer personalized (1 on 1) custom made treatments for treating conditions such as depression, post-traumatic stress disorder (PTSD), addiction to barbiturates and substances that create dependency with treatments that can range from 3 to 12 months.

We offer a holistic detoxification and spiritual development processes that can range from 1 to 3 months for those seeking physical cleansing, healing and deep connection with the self. 

We also offer spiritual retreats that can range from simple detoxification processes with or without the use of an entheogen of 1 to 3 days, to longer retreats of 5 to 12 days that entail a process of purification, isolation, silence, introspection and preparation for 1 or 2 sessions with a designated entheogen.

All sessions in our treatments and retreats are private.

The treatments are guided by Guillermo Guillen, who has worked for more than 10 years with Master Plants and specializes in treating chronic physical conditions with Chlorine Dioxide Solution (CDS).

Our purpose is to reconnect individuals to their own self-healing power and guide them to find the necessary strength so they can lead their lives from the wisdom that resides within their hearts.

 


Un abrazo del universo

Llegue a este camino cuando me encontraba en una crisis de pánico, sentí que no estaba viviendo la vida que me merecía y eran tantos mis miedos que me llevaron a buscar una solución profunda y real; puedo decir que llegue con tanto miedo y prejuicios hacia el proceso y con una mente fuera de control que racionalmente nosé como me atreví a intentarlo, ahora se que era Dios guiando… Read More “Un abrazo del universo”

July 13, 2018
Ana Gabriela Paredes Solares

Humanidad is a safe heaven

I’ve known Guillermo for 3 years now and I was beyond excited to be back in Guatemala. Humanidad is a safe heaven for those of us who are looking to reconnect with ourselves and nature. Guillermo is the perfect person to guide us through the steps that must be taken to accomplish this. The Humanidad Center is a wonderful place in San Pedro de la Laguna, Lake Atitlan, where you’re… Read More “Humanidad is a safe heaven”

July 21, 2018
Monica Jones

Transformational experience

My 5 day retreat with Guillermo has been one of the most beautiful and moving experiences of my life. I met Guillermo and his team on a talk about entheogens and medicinal plants and I immediately felt an amazing trust towards Guillermo’s respect of the healing processes and immense knowledge of the plants. Since years ago, I have been curious about exploring my inner universe through Ayahuasca and I signed… Read More “Transformational experience”

August 23, 2019
Mariel Orellana

Worth returning for an extended process

Guillermo’s intuitive spirit is sensitive, tender, and caring – paired with a subtle but persistent intensity and focus in his heartfelt endeavor to create the space for, and assist in, (re)discovering your own ability to shatter the paradigms you’ve inherited and created. There is a true commitment from this man that embodies the sacredness and respect that this path of plants and self-liberation calls for, yet it is balanced so… Read More “Worth returning for an extended process”

August 19, 2019
Anthony Chetta

Heart opening experience!!

Me and my partner did 3 Kambo sessions three days in a row with Guillermo in Lake Atitlan, Guatemala. It was the most beautiful and heart opening experience. Guillermo created such a beautiful, safe and sacred space and served with such humility that which I have never experienced before. We are so grateful for this man, the work he is doing and all he has to offer. Thank you Guillermo… Read More “Heart opening experience!!”

July 12, 2018
Kae

A defining experience that continues to guide me

I had the opportunity to visit Humanidad twice: first for a month-long diet, and then for two weeks a couple of years later. I found that the support and care I received at Humanidad was firmly grounded in love, respect, and understanding. Both experiences were profoundly transformative. I realized that this process takes time for me; the shorter dieta ended just as I was beginning to delve deeper. In future,… Read More “A defining experience that continues to guide me”

September 8, 2025
Elma

Supportive and beautifully natural setting

We loved our day long couples ceremony and how welcoming and warm Guillermo´s retreat centre was. It actually made our purging pleasant! The sauna and the homemade healthy food was also amazing. Our picnic outdoors by the peaceful Lake Atitlan, the herbal tea and beet juice blend was just perfect and so comforting after our ceremony. We could not of asked for a more supportive and beautifully natural setting for… Read More “Supportive and beautifully natural setting”

September 11, 2019
Martin and Charity

Definitely will come back!

“I have just finished a one month process with Guillermo in the beautiful Lago Atitlan area. I know Guillermo now for 5 years, having done 4 treatments between 2 weeks and 3 months duration every year. This was my 5th time. Every time has been incredible for all experiences and understanding of myself, of life, our conditionings, our own imprisonment, and so much more…. It has been a crucial part… Read More “Definitely will come back!”

February 15, 2018
Antje

UNCONDITIONAL LOVE

Two years ago I decided to give a quality shift to my life. I quit my job and started to travel alone through Central America in a journey to discover myself. I was amazed to everything that was happening during that time, but was missing something that I needed to find. It was at the end of my 6th month, before returning my first time to Switzerland when I met… Read More “UNCONDITIONAL LOVE”

October 7, 2019
Joy

Working with Guillermo Saved My Life

My 9 month process with Guillermo at Humanidad Healing Center saved my life. Before I arrived at Humanidad, I was severely suicidal and had been bedbound for 2 years suffering from an incurable neurological illness I got after a Covid infection in 2022, also known as ME/CFS. My life before I found Guillermo was very bleak and it was hard for me to find any happiness on a daily basis… Read More “Working with Guillermo Saved My Life”

October 20, 2025
Max S.

The treatments are completely personalized and tailored to the individual according to their unique circumstances.

Spaces at the centre are strictly limited allowing only to treat two participants at any given time in order to ensure that proper support and guidance is available throughout their entire treatment process. For the majority part of the treatment, participants enjoy the benefits of 1 on 1 therapy, offering total privacy and thorough service.

Treatments include post process follow-up through online consultations with Guillermo to help participants with the integration into their daily life. We offer pre and post treatment support with no additional cost.  

Video Testimonials

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