Grumpy Old Geeks Topics Glucose and ketone tracking Topic Glucose and ketone tracking 3 mentions in 1 episode Ferriss discusses testing his glucose and ketone levels and the cost of test strips. Mentions 107: Grump on Grump with Tim Ferriss Apr 28, 2015 50:38 understanding of my own body as it responds to food 51:06 The ketone strips are very expensive. 51:35 once when you wake up in the morning fasting state