Bryan Johnson, the tech entrepreneur behind the anti-ageing initiative Project Blueprint, has become one of the world’s most recognisable biohackers, documenting his efforts to slow biological ageing through intensive health monitoring and experimental longevity interventions. Johnson has invested millions in the project, which involves a strict diet, supplements, exercise, continuous testing, and publicly sharing his health data to maintain transparency about both successes and setbacks in his pursuit of extended healthspan.
In 2023, one of his most high-profile experiments drew significant public attention: a multi-generational plasma exchange involving his teenage son and his father. Based on the theory that factors in younger blood could help slow or reverse aspects of ageing, the procedure involved transferring plasma, the liquid component of blood that carries proteins, antibodies, and other molecules, from his son to Johnson.
Johnson later discontinued the treatment after reporting no measurable benefit based on his biomarkers. While his experiment did not yield personal benefits, it contributed to public interest in longevity science. Research into plasma-based therapies continues in clinical settings for various conditions, though applications for healthy ageing remain experimental.
More recently, in 2026, Johnson revealed he had been diagnosed with autoimmune gastritis, although there is currently no evidence linking the condition to the plasma exchange. Medical experts note that autoimmune gastritis involves the immune system attacking stomach lining cells, potentially leading to nutritional deficiencies, and affects an estimated 2%–5% of the population. His diagnosis underscores the complexities of long-term health management, even for those following rigorous regimens.
Johnson’s case has sparked wider discussion about the balance between cutting-edge biohacking and established health practices. Ralph Montague, Expert at The Longevity Clinic, comments: “Johnson’s experience highlights the difference between experimental biohacking, which absolutely has a place in advancing our understanding of longevity, and the often overlooked fundamentals that have a profound impact on how well we age. High-profile interventions naturally attract attention, but they can overshadow the powerful influence that chronic stress, quality of thought, emotional well-being, and genuinely enjoying life have on long-term health. It’s important not to confuse a fascinating experiment with a proven strategy for healthy ageing. The greatest gains in longevity still come from combining scientific innovation with the everyday habits we know make the biggest difference.”
Montague emphasised evidence-based approaches over extreme measures: “For most people, the interventions that are most likely to improve healthspan aren’t the most extreme; they’re the ones supported by decades of research and practised consistently.”
Montague added: “The biggest gains in longevity rarely come from the newest biohacking trend; they come from doing the fundamentals exceptionally well. That’s not to say breakthroughs aren’t possible. Many of today’s medical advances began as bold ideas. However, time is one of the greatest tests of any longevity intervention. Before robust clinical evidence emerges, it’s important to approach new treatments with both enthusiasm and healthy scepticism.”
Evidence-based longevity habits
Health professionals continue to stress that sustainable lifestyle choices form the foundation of healthy ageing. As interest in longevity grows, experts like Montague advocate integrating innovative research with proven fundamentals rather than relying solely on high-profile interventions.
Instead of chasing experimental biohacks, experts recommend focusing on the longevity habits supported by decades of research and large population studies
- Muscle strength: Build and maintain muscle with regular resistance training. This helps preserve strength, mobility and metabolic health as we age.
- Cardiovascular fitness: Prioritise cardiovascular fitness through regular aerobic exercise. This reduces the risk of heart disease, stroke, and cognitive decline.
- Metabolic health: Protect your metabolic health by managing blood pressure, cholesterol, blood glucose, and maintaining a healthy body composition.
- Nutrition: Eat a balanced, minimally processed diet rich in vegetables, fibre, healthy fats and adequate protein. This supports healthy ageing.
- Sleep hygiene: Make sleep non-negotiable. Consistently getting seven to nine hours of quality sleep supports brain function, immune health, and recovery.
- Social engagement: Don’t underestimate social connection. Strong relationships and a sense of purpose are increasingly recognised as important contributors to healthy ageing and longevity.