Bryan Johnson, a 47-year-old known for his extreme anti-aging pursuits, recently experienced a setback. After undergoing a facial fat injection procedure using donor fat, Johnson suffered a severe allergic reaction that caused extreme swelling, leaving him temporarily unrecognizable. Bryan Johnson, a 47-year-old known for his extreme anti-aging pursuits, recently experienced a setback. After undergoing a facial fat injection procedure using donor fat, Johnson suffered a severe allergic reaction that caused extreme swelling, leaving him temporarily unrecognizable. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle