Sleep is often spoken about as if it sits in isolation, something that can be improved with a supplement, a routine, or a single adjustment. In practice, it is far more interconnected than that. The way you move towards sleep each night reflects your nervous system, your hormonal rhythms, and your underlying biology, including your genetic predispositions.

When I work with people using genetic reports, what becomes clear very quickly is that sleep is not simply about being tired. It is about how the body transitions from activation into rest, and for many people, that transition is not straightforward.

The evening is a particularly important window. As light begins to fade, melatonin starts to rise, signalling to the body that it is time to move towards sleep. At the same time, insulin sensitivity begins to reduce, which is one of the reasons why eating later in the evening can have a very different impact on the system compared to eating earlier in the day.

When food is introduced at this point, especially in larger amounts or with higher sugar content, the body is required to shift back into metabolic activity at a time when it is biologically preparing for rest. This can lead to a rise in cortisol as the system attempts to manage blood sugar and maintain stability. Over time, this pattern can contribute to a kind of cortisol dysregulation, where the natural rhythm of high in the morning and low at night becomes flattened or even inverted.

This is where the Timeline and Terrain approach becomes essential, because the impact of these patterns is not the same for everyone. Genetics play a significant role in how resilient or sensitive a person is to these shifts.

For example, variations in genes such as FKBP5 can influence how the body regulates cortisol. When this system is more reactive, stress responses can be amplified and prolonged, making it harder for the body to settle in the evening. Even small disruptions, whether from food, light, or emotional activation, can keep the system in a state of alertness.

Adrenaline receptor genes also shape how the body responds to stimulation. Some people are naturally more sensitive to adrenaline, meaning that they may feel wired more easily, particularly in the evening. This can show up as difficulty winding down, a second wind late at night, or a sense of being tired but unable to switch off.

Alongside this, the GABA receptor system plays a crucial role in calming the nervous system. GABA is one of the primary inhibitory neurotransmitters, helping the body move out of states of activation. Variations here can make it harder to access that sense of internal quiet, which is often needed for sleep to come naturally. This is one of the reasons why some people may find themselves relying on alcohol in the evening, as it temporarily enhances GABA activity, creating a sense of relaxation. The difficulty is that this effect is short-lived, and it often disrupts the deeper architecture of sleep later in the night.

The endocannabinoid system, including genes such as FAAH, also contributes to how we regulate stress and return to baseline. When this system is less efficient, the body may hold onto activation for longer, making the transition into rest more difficult. This can subtly influence sleep patterns over time, even if it is not immediately obvious.

Melatonin itself is also influenced by genetics. Variations in melatonin receptor genes can affect how sensitive the body is to its signalling. For some people, this means that the rise in melatonin in the evening does not translate as clearly into a feeling of sleepiness, particularly if other systems, such as cortisol or adrenaline, are still active.

What begins to emerge is a picture of sleep as a coordinated process, rather than a single function. The nervous system, the hormonal system, and the metabolic system all need to move in the same direction. When one part is out of sync, the whole system feels it.

This is why Grassroots Healing becomes so important in this area. Rather than trying to override sleep difficulties, the work becomes about gently bringing these systems back into alignment. That might include adjusting the timing of food, supporting blood sugar stability earlier in the day, working with light exposure, and addressing the underlying patterns of activation within the nervous system. And herbs and supplements tailor-made for you and your individual nervous system.

It also involves understanding your own timeline and terrain. When did sleep begin to shift? What was happening in your life at that time? How does your body tend to respond to stress, stimulation, and change? These questions often reveal more than any single intervention. Even small adjustments, when made in the right place, can have a significant impact. Eating earlier in the evening, allowing melatonin to rise without interruption, can support a more natural transition into sleep. Supporting the nervous system during the day can reduce the need for the body to stay alert at night. Working with, rather than against, your biology creates a different kind of movement.

This is the work I do with people, bringing together genetics, nervous system understanding, and functional medicine, so that sleep is not approached in isolation, but as part of a wider, integrated system. When that system begins to settle, sleep often follows in a way that feels more natural and sustainable.