The idea that our actions and thoughts can directly alter our DNA is an intriguing concept, but it is important to note that the scientific understanding in this area is still evolving, and there is ongoing research exploring the potential connections between our experiences and DNA modifications. While it is known that certain environmental factors, such as exposure to toxins or radiation, can cause DNA damage, the influence of thoughts and actions on DNA modifications is a more complex topic.

1. Epigenetics and Gene Expression:
   Epigenetics is the study of changes in gene expression or cellular phenotype that do not involve alterations in the underlying DNA sequence. Epigenetic modifications can be influenced by a variety of factors, including environmental exposures, lifestyle choices, and stress levels. These modifications can affect how genes are "switched on" or "switched off" and can potentially have long-lasting effects on cellular function.
2. Research on Environmental Influence:
   Several studies have explored how environmental factors can influence epigenetic modifications. For example, research has shown that exposure to stress, diet, exercise, and certain chemicals can lead to changes in gene expression patterns through epigenetic mechanisms. These studies suggest that external factors can impact our biology and potentially influence the activity of certain genes.
3. Mind-Body Connection and Health:
   Research in the field of psychoneuroimmunology has explored the relationship between the mind, emotions, and physical health. Studies have shown that chronic stress, for instance, can have a negative impact on the immune system and overall well-being. While the exact mechanisms linking these effects to DNA modifications are still being investigated, it is speculated that stress-related hormonal changes and inflammatory responses could potentially influence epigenetic processes.
4. Neuroplasticity and Brain Changes:
   Studies on neuroplasticity have demonstrated that the brain has the ability to change and adapt throughout life in response to experiences and behaviors. These changes are believed to be mediated by a combination of genetic and epigenetic mechanisms. While the focus has primarily been on brain-specific modifications, the extent to which these changes can influence other cells and tissues in the body, including DNA modifications, is an area of ongoing research.

It is important to approach this topic with scientific skepticism and recognize that more research is needed to fully understand the complex relationship between our actions, thoughts, and DNA modifications. While studies suggest that external factors can influence gene expression through epigenetic mechanisms, the direct and immediate alteration of DNA by thoughts and actions is still a topic of investigation and debate.