Why Kerry Mann Started Tracking Ketones on Carnivore

After more than 1,000 days on carnivore, Kerry Mann expected his ketones to be fairly stable. He already had a continuous ketone monitor at home, but it sat unused. He doubted it would tell him much about a diet he knew so well.

Then a period of feeling particularly energetic and mentally clear made him curious. He checked his ketones with a finger-prick meter and continued testing over several days. Those readings encouraged him to take a closer look.

He put on the continuous ketone monitor, or CKM, and began 14 days of tracking. Now he could see what happened between the individual tests he had been taking.

What Changed During His 14-Day Experiment

The monitoring period took place against a background of several changes. Kerry had returned to one meal a day, often called OMAD, reduced his dietary fat intake, and started going to the gym regularly. These adjustments were already underway before he put on the sensor.

He recalls spending much of the tracking period around 2–3 mmol/L.

Even within that generally familiar range, he noticed movement across the day. He described fluctuations around waking, eating, and exercising. His readings were not a flat line, despite his continued commitment to carnivore.

Several parts of his routine had changed together. Meal timing, fat intake, and exercise all belonged in the picture as he followed his readings across the two weeks.

The Unexpected Drop Around His Appearance on Stage

Kerry was still eating carnivore when his readings took a turn he had not expected.

He recalls a sharp ketone drop around his appearance at Meat Stock in Gatlinburg, Tennessee, where he spoke to more than 1,200 people. He says he had not felt especially anxious beforehand. On stage, however, he felt intensely alert and energized.

That contrast caught his attention. He had continued carnivore, yet his readings had changed dramatically around an unusual event. He began looking beyond food and wondered whether the stress response was involved.

The readings did not immediately return to their previous range. By his recollection, the return took almost a week, during a period that also included travel and other activities.

The experience gave him a reason to reconsider how much his diet alone could tell him about his ketones.

Can Stress Explain a Drop in Ketone Readings?

Stress was one possible factor Kerry considered after the event. The body's response to a demanding situation can change how it makes fuel available, even when food intake has not changed.

For example, human research on adrenaline has shown increased glucose output from the liver. But there is no simple formula in which stress always makes ketones fall. Another human experiment found that adrenaline increased the entry of ketones into circulation under the conditions studied. These findings help explain why the response needs context.

Kerry did not provide simultaneous cortisol or other hormone measurements. Travel, activity, dietary adjustments, and measurement conditions were also part of the picture. His readings changed around his stage appearance, but that timing alone cannot establish that stress caused the drop.

His experience raises a useful question about life beyond food, with several possible influences still to explore.

What Can Continuous Ketone Tracking Reveal That One Reading Cannot?

From a Single Snapshot to Changes Across the Day

Kerry's finger-prick checks told him about particular moments. They could not show the path his readings took between tests, including fluctuations he might never have thought to check.

Continuous tracking added that time dimension. Across his 14 days, he described a familiar range, movement within the day, and a striking departure around an unusual event. Seeing those features together gave him more to consider than an isolated high or low reading.

Add Context and Look for Repeated Patterns

To make that timeline more useful:

1. Add event times. Note meals, fasting periods, exercise, sleep, travel, and perceived stress alongside the readings. Record what happened rather than assigning a cause immediately.
2. Look for repetition. Compare similar situations on different days. A pattern that recurs under comparable conditions gives you a better question to investigate than one isolated coincidence.
3. Keep comparisons interpretable. Retain the device type and units, check unexpected readings according to its instructions, and avoid changing several habits at once.

SiBio KS3 is one example of a continuous ketone monitor that measures interstitial-fluid BHB and provides readings every five minutes for up to 14 days. Kerry's transcript does not identify his device's brand or model.

Lifestyle tracking does not replace clinical testing or an individual medical care plan.

What Kerry's Experience Can Teach Other Carnivore Eaters

Carnivore does not necessarily make ketone patterns predictable. Continuous tracking can provide more context around those patterns and help people ask better questions about what may be influencing them.