Understanding Biology’s Resistance to Change

On our journey to better health and wellbeing, we often encounter the principle that biology is inherently resistant to change. This resistance is not an obstacle, but a protective mechanism designed to maintain the stability and balance of our bodies. When making dietary and lifestyle changes, understanding and embracing this concept can greatly enhance our journey to wellness, especially when we are struggling with old habits or when improvements seem slow to manifest.

Conceptual image contrasting "Normal" and "New Normal" with visuals symbolizing adaptability and change in biology

The Essence of Homeostasis and Resistance to Change

Homeostasis, the process by which the body maintains stable internal conditions despite external changes, is at the heart of biology’s resistance to change [1]. This principle ensures the regulation of critical variables such as temperature and glucose levels, acting as a silent guardian of our physiological well-being. It explains why sudden changes in lifestyle, diet or medication can sometimes have unintended consequences, highlighting the need for patience and gradualism in our health journey.

Evolutionary Perspective on Adaptation

Evolution shows us that biological change is gradual, allowing organisms to adapt to their environment in a sustainable way [2]. This slow pace of evolutionary adaptation underscores the complexity of biological systems and the importance of a cautious approach to personal health change. It reminds us that significant adaptations, whether for a single organism over a lifetime or for a species over millennia, take time to become beneficial and sustainable.

Integrating New Habits and the Three-Month Rule

As patients begin to feel improvements and consider further changes to their health plan, such as adjusting their supplements or diet, it’s important to allow the body to adjust to its new state of wellness [3]. This adjustment period is essential because, although you may feel better, your body’s new balance is not yet fully established. I recommend a three-month period of stability before making any changes, to give the body time to consolidate improvements and reduce the risk of relapse.

This principle is particularly poignant for those who are not yet well and are struggling to break old habits. Biological resistance to change means that adopting new, healthier habits or adapting to a new health regime can be challenging. The body and mind can resist these changes, making it difficult to break out of established patterns.

Why a Three-Month Adaptation Period?

  1. Physiological adaptation: The body needs time to adjust to new routines, especially when it comes to changes in diet, exercise or medication/supplement adjustments. This period allows the body to recalibrate and establish a new balance, ensuring that improvements are sustainable in the long term.
  2. Psychological adjustment: Changing established behavioural patterns can be challenging because of neural pathways that reinforce old habits. It takes time for the brain to make new connections that support new behaviours. The three-month period may provide a sufficient window for these neural adaptations to occur, making new habits feel more natural.
  3. Stabilising improvements: Early improvements can be motivating, but they may not be stable. The three-month rule allows these gains to be consolidated, reducing the risk of regression. This period helps to consolidate the foundation of new habits before further changes are introduced.
  4. Overcoming resistance to change: Both the body and the mind can resist change at first, even if it is beneficial in the long run. A gradual approach to habit formation, with an emphasis on stability before further change, can help to overcome this resistance.

Embracing Patience and Persistence

For those who find it difficult to let go of old habits or to see improvements, it’s important to remember that this resistance is a natural part of the change process [4]. Patience and persistence are important allies. Small, incremental changes can be more effective, giving the body and mind time to adapt and accept new patterns. Celebrate each small victory and view setbacks not as failures but as opportunities to learn and adjust your approach.

Support from healthcare providers and a supportive community of friends and family can provide the encouragement and accountability needed to persevere. Remember that the journey to good health is not a straight line. It’s full of ups and downs, successes and challenges. By understanding and respecting our biology’s tendency to resist change, we can approach our health goals with an attitude of patience, gradualism and kindness to ourselves.


Biological resistance to change is a testament to the incredible complexity and resilience of our bodies. As we work towards better health, accepting this resistance as a natural part of the process can empower us to make lasting changes. Whether we are trying to overcome old habits or integrate new ones, the journey requires time, understanding and compassion. Slow and steady progress, guided by an understanding of our bodies’ needs and rhythms, can lead us to lasting wellness and a deeper appreciation of the journey itself.


  1. Silverthorn, D. U. (2010). Human Physiology: An Integrated Approach. Pearson Education. Explains the concept of homeostasis and its importance in maintaining physiological balance.
  2. Futuyma, D. J. (2013). Evolution. Sinauer Associates. Provides insights into the evolutionary process and how species adapt over time.
  3. Lally, P., Van Jaarsveld, C. H. M., Potts, H. W. W., & Wardle, J. (2010). How are habits formed: Modelling habit formation in the real world. European Journal of Social Psychology, 40(6), 998-1009. Discusses the time it takes to form new habits and the importance of consistency.
  4. Duhigg, C. (2012). The Power of Habit: Why We Do What We Do in Life and Business. Random House. Explores the science of habit formation and how understanding it can facilitate change.

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