It’s a common misconception that a one-size-fits-all approach works for everyone, especially when it comes to diet. As highlighted in his books, including the latest version, one key discovery emphasizes that individuals are not all the same, meaning dietary needs differ. This understanding has been a game-changer, enabling many people who previously struggled to lose weight to finally achieve success.
The nervous system plays a significant role in these individual differences. It influences how our bodies react and what kind of fuel they need. Visual examples, such as a boxer representing a highly active person and a nurse embodying a more relaxed individual, illustrate the concepts of an “excited” versus a “passive” nervous system.
Understanding whether your body is more dominant on the “excited” or “passive” side of the nervous system spectrum is crucial. This knowledge informs how to adjust your diet, including approaches like the 2×1 or 3×1 diet, to align with your specific needs. Not everyone thrives on the same dietary approach; some may not be suited for vegetarianism, while others might not do well with a purely carnivorous diet.
The nervous system operates like a network of cables extending from the brain down the spinal cord, branching out in various directions. The “excited” nervous system is linked to action, triggering the “fight or flight” response, directing energy to muscles and sharpening mental focus for quick reactions. Conversely, the “passive” nervous system is more connected with digestion and rest. Some individuals have a nervous system that can digest almost anything, anytime.
Identifying where you fall on this spectrum is essential. Ideally, a balanced nervous system exists, but those individuals tend not to experience weight or diabetes issues. Tailoring diet and even supplement recommendations to your specific nervous system type can yield remarkable results, leading to success where previous attempts have failed.

Here’s a simple way to begin understanding your nervous system dominance:
Passive Nervous System: Primarily geared towards digestion and rest, individuals with a passive nervous system typically have a robust digestive system. They can eat almost anything without issue, often enjoying meat and heavier foods.
Excited Nervous System: Designed for “fight or flight,” those with an excited nervous system often have a more delicate digestion. When the body prepares to fight or flee, digestion isn’t a priority.
Other characteristics to consider: Those with a passive nervous system generally sleep soundly, are carnivore-inclined, and handle fats well. Conversely, those with an excited nervous system may experience light sleep or insomnia, benefit more from a vegetarian-style diet with lean proteins like chicken, turkey, or fish.
Thinking of it in terms of fuel, the passive nervous system is like a diesel engine, thriving on heavier fuel, while the excited nervous system is like a gasoline engine, requiring lighter, more refined fuel.
By aligning your diet with your specific nervous system type, you can balance your hormonal system and achieve weight loss goals.