Biohacking represents an intriguing fusion of biology, technology, and personal health. Participants, known as biohackers, aim to optimize their physical and mental performance by tracking and modifying various aspects of their biology through a range of techniques, from simple dietary changes and supplement regimes to more advanced methods, such as gene editing and implantable devices.

The concept has gained considerable traction over recent years, driven partly by advancements in technology that have made data more accessible and partly by a growing desire among the public to take a more proactive approach to health. At the cutting edge of this movement are figures like Dave Asprey, who popularized the term 'biohacking' with his focus on 'Bulletproof' nutrition to enhance bodily functions, and Bryan Johnson, an entrepreneur heavily invested in reversing the aging process.

Biohacking can be segmented into various practices, from 'grinders' who physically alter their bodies with technological implants to gain new capabilities or enhance existing ones, to those who use nootropics or 'smart drugs' to improve cognitive function.

Bryan Johnson’s endeavors notably push the boundaries of biohacking with his comprehensive approach to tracking and manipulating his own biology to reverse aging. Hosting events like the 'Don’t Die' dinner, he exemplifies the extreme end of biohacking, using scientific knowledge and available technology to extend life and enhance health. His actions underscore a core philosophy of the biohacking community: the belief that we are not fixed entities and that with the right tools and knowledge, we can engineer ourselves to better states of being.

This shift from passive patient to active participant in personal health is reshaping the health and nutrition industries. Companies specializing in biometric monitoring devices, personalized nutrition, and even genetic sequencing are finding an enthusiastic market among biohackers looking to tailor their lifestyles and diets to their unique biological needs.

Moreover, the allure of biohacking also raises important ethical and safety questions. The freedom to experiment tends to clash with regulatory frameworks designed to ensure medical safety. DIY biohacks, especially those involving genetic modification, present significant risks not just to the individual performing them but potentially to society at large if not properly managed.

Despite these concerns, the push for personal empowerment in health continues to grow, expanding the reach of biohacking into mainstream practices. As technology advances and becomes more integrated into everyday life, biohacking's potential to revolutionize personal health appears bound only by the limits of the technology and the creativity of the individuals who wield it. Whether for enhancing personal performance or managing disease, biohacking offers a profoundly personalized approach to health and wellness, signaling a new era of participatory medicine driven by and tailored to the individual.