In this episode of the Biohacker's Podcast, Teemu Arina speaks with Matt Maruca, founder and CEO of Ra Optics, to examine the critical role light plays in human biology.

Matt reframes light as a primary biological input that regulates circadian rhythm, hormone production, mitochondrial efficiency, and sleep quality. He explains how excessive exposure to artificial blue light (especially after sunset!) disrupts melatonin release and contributes to metabolic dysfunction, poor recovery, and chronic fatigue. Ra Optics was founded to address these challenges through scientifically engineered eyewear that selectively filters harmful wavelengths while preserving beneficial light.

The discussion moves beyond blue light fear-mongering into practical circadian strategy. Matt emphasizes the importance of bright, full-spectrum light exposure during the day to anchor biological timing, while advocating warm, low-intensity lighting in the evening to support sleep. He highlights the role of red and near-infrared light in mitochondrial energy production and recovery, and cautions against low-quality lenses that distort vision or block indiscriminately.

Looking forward, Matt envisions a future where personalized light environments - integrated with sleep and performance data - become central to health optimization. The episode concludes with a shared message: improving light hygiene is one of the highest-leverage, lowest-effort interventions available in modern biohacking.

Learn more about Ra Optics at https://raoptics.com and follow Matt on Instagram: @thelightdiet!

This conversation was recorded in October 2025.

Check https://hololifesummit.com for upcoming events & tickets! Devices, supplements, guides, books & quality online courses for supporting your health & performance: https://hololifecenter.com

Key moments and takeaways:

00:00 – Introduction by Teemu Arina

01:10 - Matt Maruca and the story of Raw Optics

02:25 - Matt’s early health struggles

04:00 - The impact of artificial light on health and well-being

05:30 - The importance of aligning with natural circadian rhythms

06:50 - Overview of the unique lenses produced by Ra Optics

08:30 - Matt reflects on his experience at the 2018 Biohacker Summit

10:20 - How mitochondrial dysfunction became a central focus for Matt

12:15 - The limitations of Western medicine

14:00 - Epigenetics and the relationship between diet, environment, and health

16:00 - Mitochondrial function: the basis for energy production and health

18:45 - How light frequency affects our biology and promotes healing

20:30 - Matt’s collaboration with Dr. Jack Cruz and other luminaries in the field

22:45 - The role of blue light in circadian rhythm regulation

25:00 - Blue light as a form of environmental toxin and its consequences

27:15 - Insights from Dr. Alexander Wunsch on photobiology and light effects

30:00 - The dynamics of melatonin production and its health implications

32:30 - Differentiating between blue light protection and traditional eye care

34:15 - Understanding the types of blue light blocking lenses: sunset and daylight

37:30 - The science behind Ra Optics’ lenses and their effectiveness

40:00 - Testimonials from professional athletes using the eyewear

42:45 - Discussion on emerging products: BlueSync lenses and their features

45:15 - How lifestyle adaptations enhance wellness beyond dietary changes

48:00 - The importance of community and collaboration in the biohacking field

50:00 - Stylish designs of Ra Optics and celebrity collaborations

52:15 - Viewer testimonials and personal experiences with the products

55:00 - Conclusion and where to find more information on Ra Optics

In this episode of the Biohacker's Podcast, Teemu Arina is joined by Jan K. Górczyński - the founder and CEO of BeKeto, a leading brand in the keto and low-carb market across the UK and EU.

In just five years, Jan expanded BeKeto to offer nearly 200 products across multiple categories, achieving a presence in 30 countries. As a serial entrepreneur, his companies generate over 10 million EUR in revenue. Jan is passionate about the execution in both life and business and is deeply committed to healthy living. He is an enthusiast of low-carb and keto diets, biohacking, and enjoys frequent sauna sessions.

Teemu and Jan dive into the evolution of ketogenic nutrition, metabolic performance, and the data-driven approach behind BeKeto’s product line. Jan explains that the company emerged from a gap in the European market. By focusing on ingredient purity, transparent formulations, and repeated glucometer-based validation, BeKeto positioned itself as a trusted source for individuals pursuing sustained ketosis. The discussion emphasizes how stable energy, mental clarity, and appetite regulation arise when the body shifts from glucose dependency to ketone-driven metabolism.

Teemu and Jan further explore the role of exogenous ketones, ketogenic snacks, and electrolyte formulations in supporting performance, recovery, and cognitive output. They highlight consumer misconceptions - particularly the confusion between “dirty keto” and true metabolic ketosis - and underscore the importance of consistency, clean ingredients, and adaptation support. Looking ahead, Jan predicts a convergence between ketogenic nutrition and continuous metabolic monitoring, enabling individuals to tailor diet and supplementation with precision. The episode concludes with a shared message: ketosis is most powerful when approached as a long-term, sustainable lifestyle rooted in intentional choices and measurable data.

Learn more about BeKeto at https://beketo.uk and follow Jan on Instagram: @ketopresident!

This conversation was recorded in October 2025.

Check https://hololifesummit.com for upcoming events & tickets!

Devices, supplements, guides, books & quality online courses for supporting your health & performance: https://hololifecenter.com

Key moments and takeaways:

00:00 – Introduction by Teemu Arina

2:35 - The Science Behind Keto

4:06 - Personal Keto Experiences

8:04 - Keto for Productivity

11:37 - The Role of Milk in Diet

15:18 - Plant-Based Diets vs. Meat

18:38 - Veganism: Beliefs and Nutritional Concerns

21:29 - Nutritional Balance in Diets

24:19 - BeKeto Products Overview

30:52 - Importance of Moderation

33:48 - Innovative Product Offerings

38:53 - Benefits of the Keto Diet

43:07 - Sustainable Keto Lifestyle

46:49 - Final Thoughts and a special offer

In this episode of the Biohacker's Podcast, Teemu Arina, curator of the Hololife Summit, interviews Christian Drapeau, stem cell researcher and CEO of STEMREGEN.

They dive into the emerging science of adult stem cells as a self-repair mechanism in the body, comparing it to the immune system. Christian explains that when injury or damage occurs, adult stem cells are released from the bone marrow, travel through the bloodstream, and contribute to tissue regeneration throughout the body.

The conversation covers the synergy between stem cell activity and mitochondrial health, particularly focusing on NAD+ and energy metabolism. Christian highlights the difference between natural, daily enhancement of stem cell release through plant-based supplements versus one-time injections—which carry risks such as contamination or genetic instability. The episode also details STEMREGEN’s proprietary blends and ingredients designed to support stem cell release, circulation, and function. Christian discusses clinical results, dietary synergies (like seaweed, omega‑3s, and polyphenols), and a daily protocol aimed at optimizing repair, reducing inflammation, and promoting longevity from within.

Christian and Teemu explore how lifestyle factors, nutrition, and targeted supplementation can naturally enhance stem cell release, migration, and function - without risky or expensive stem cell injections. Christian shares details on STEMREGEN’s formulations, including plant-based ingredients like fucoidan, aloe macroclada, and green tea polyphenols, and outlines a practical daily protocol for activating the body's self-renewing systems.

Learn more about STEMREGEN at https://stemregen.co and follow Christian on Instagram: @stemcellchristian!

This conversation was recorded in July 2025.

Check https://hololifesummit.com for upcoming events & tickets!

Devices, supplements, guides, books & quality online courses for supporting your health & performance: https://hololifecenter.com

Key moments and takeaways:

0:00 – Introduction by Teemu Arina

1:28 – Stem cells as a repair system

3:15 – History leading to stem cell science and modern applications

4:23 – Understanding adult stem cells vs. embryonic ones

5:52 – Clinical trials in chronic heart failure and Parkinson’s

7:01 – Age-related stem cell decline and its implications

9:01 – Natural reduction in stem cells and the need for support

10:13 – Daily cell turnover and role of stem cells in renewal

11:37 – How Christian boosted his own stem cell count

12:41 – Factors that reduce or support stem cell production

13:51 – Longevity benefits tied to functional repair, not anti-aging

15:06 – Aging reduces stem cell mobility and repair function

16:12 – Animal studies showing migration and tissue repair

17:31 – Food vs. pharmaceuticals in stem cell support

21:38 – STEMREGEN ingredients and supplement introduction

23:15 – How stem cells are attracted via receptor interaction

24:24 – Mechanism: stem cells homing in on injury sites

25:28 – How STEMREGEN activates targeted repair pathways

26:52 – Nutrients that boost stem cell circulation naturally

27:55 – Improving microcirculation to enhance stem cell activity

29:35 – Product safety, colostrum, and NSF certification

30:44 – Clinical study publication and product validation

32:18 – Attracting stem cells to problem areas effectively

33:23 – Signaling and directing stem cells in the body

34:41 – At what age should stem cell support begin?

35:49 – Athletes and stem cell usage under physical stress

37:14 – Aging and insufficient stem cells to offset degeneration

38:43 – Cardiovascular use case and stacking strategy...