Entrepreneur and longevity advocate Bryan Johnson, known for his ambitious Project Blueprint, has revealed a new health challenge: a diagnosis of autoimmune gastritis (AIG). The condition, identified through a stomach tissue biopsy in May, marks the end of years of uncertainty regarding persistent low iron levels despite his meticulously tracked health regimen.
Understanding Autoimmune Gastritis (AIG)
Autoimmune gastritis is a chronic disorder where the body's immune system mistakenly targets and attacks its own parietal cells in the stomach lining. These specialized cells are crucial for producing stomach acid and intrinsic factor, a protein vital for absorbing vitamin B12.
As AIG progresses, the stomach's ability to produce acid diminishes, severely impairing the absorption of essential nutrients like iron and vitamin B12. The disease often develops slowly over many years, with symptoms appearing gradually, which can lead to late diagnosis.
The Impact on Bryan Johnson's Health
Johnson's doctors uncovered his condition while investigating years of unexplained low ferritin (iron stores). Blood tests showed elevated anti-parietal cell antibodies, and subsequent stomach biopsies confirmed early autoimmune damage. This diagnosis provides clarity for a health mystery that even Johnson’s rigorous biohacking and monitoring couldn't initially explain.
Symptoms and Risks of AIG
Many individuals with autoimmune gastritis experience no symptoms in its early stages. However, as the disease advances, symptoms can include:
- Persistent fatigue and weakness
- Iron deficiency that resists supplementation
- Vitamin B12 deficiency and anemia
- Pale skin, shortness of breath, dizziness
- Neurological issues like numbness, tingling, difficulty with balance, or memory problems
- Sore tongue, digestive discomfort, and loss of appetite
If left untreated, AIG can lead to serious complications such as pernicious anemia, severe fatigue, neurological issues, and an increased long-term risk of stomach cancer and gastric neuroendocrine tumors. Johnson has also lived with Hashimoto's thyroiditis, another autoimmune disorder, since his early twenties, highlighting a common co-occurrence of these conditions.
Current Treatment and Johnson's Quest for a Cure
Currently, there is no approved cure for autoimmune gastritis. Conventional treatment focuses on managing complications rather than halting the immune attack itself. This typically involves regular monitoring, iron supplementation (oral or intravenous), and vitamin B12 injections to address deficiencies.
However, Bryan Johnson, true to his ambitious nature, is not content with simply managing the condition. He has stated his intention to pursue experimental therapies, including immune-cell engineering, regulatory T-cell therapies, and AI-designed biological treatments, in an effort to find a cure.
Biohacking and AIG: No Direct Link
While Johnson's extensive biohacking practices are well-known, there is no scientific evidence suggesting that biohacking itself causes or worsens autoimmune gastritis. Doctors initially considered whether his plant-based diet, intense exercise, sauna use, and hyperbaric oxygen sessions contributed to his low iron levels. However, further testing confirmed that AIG was the underlying cause, preventing effective iron absorption.
Nonetheless, certain extreme health practices, if not carefully managed, could potentially complicate the disease's management by increasing nutritional demands or interfering with nutrient absorption.