Light, Darkness And The Body's Natural Rhythm
By mid to late winter in the northern hemisphere, many people notice a similar pattern, and you may identify with one or more of the following:
- more tired than usual
- a little heavier or slower
- less motivated
- flatter emotionally
- more sensitive or irritable
- craving more comfort and rest
And often, the first thought too many people have is:
“What’s wrong with me?”
But what if the better question is:
“What is my body adapting to?”
Because winter is not just a change in temperature, it's a significant change in daylight at more northerly latitudes.
Light, The Brain & Our Master Glands
At the centre of this light–dark relationship are two very important glands in the brain:
- the pituitary gland
- the pineal gland
The pituitary gland, located in the middle of the brain, and is often referred to as the master gland because it helps regulate and coordinate the entire hormonal system. It acts like a conductor, making sure all the other glands are communicating and functioning in harmony.
Working closely with the pituitary is the pineal gland, which is deeply sensitive to light and darkness. The pineal gland plays a key role in how the body responds to seasonal changes by regulating hormones such as melatonin — the hormone associated with sleep, rest, and circadian rhythm.
In the animal world, the pineal gland is what allows animals to change their fur colour from darker shades to white in the winter, helping them naturally camouflage and adapt to their changing environment.
In a similar way, the pineal gland helps us adapt too!
As daylight decreases, the pineal gland signals the body to slow down, rest more, sleep longer, and pull inward. It’s an unavoidable part of our natural biological design — a built-in seasonal intelligence that encourages conservation of energy during darker months.
This is why many of us naturally feel the urge to:
- sleep more
- cocoon
- withdraw socially
- crave warmth and comfort
- move more slowly
The very real challenge we face is that modern life rarely allows us to follow this natural rhythm.
We are expected to maintain the same pace, productivity, and stimulation in Winter as we do in Summer — even though the signals our brain and hormonal system are receiving are completely different.
And when we consistently override these natural cues, the nervous system can become dysregulated — which often shows up as fatigue, low mood, irritability, poor sleep, or feeling emotionally “off”.
Our bodies are deeply influenced by natural light cycles. When days are darker longer, the brain receives fewer signals to produce certain “daytime” hormones like serotonin, while producing more melatonin — the hormone associated with sleep and rest.
In simple terms less light often means less energy and lower mood though this doesn’t mean anything is wrong with you, rather, it means your body is responding intelligently to its environment.
For the majority of human history, winter was a season of:
• slowing down
• resting more
• conserving energy
• eating more warming foods
• spending time indoors
The problem is not that our bodies still follow seasonal rhythms, the problem is that modern life often asks (or requires) us to ignore them.
We are expected to function at the same speed in February as we do in July — even though the biological signals our body receives are completely different.
So the body adapts the only way it knows how, by pulling inward, and that can show up as:
- lower motivation
- heavier moods
- increased need for sleep
- more cravings
- less desire to socialize
- less mental sharpness
This is not a personal failure, it is natural seasonal physiology.
From a holistic perspective, mood is not just psychological — it is biochemical, neurological, hormonal, and environmental as light affects:
- circadian rhythm
- serotonin and melatonin
- cortisol patterns
- nervous system tone
- sleep quality
- energy levels
Which is why winter mood changes are not something we can “think our way out of” meaning they are something we must support our way through. And support doesn’t mean forcing motivation or positivity, it means gently working with the body’s needs.
Sometimes the most supportive thing we can do is not add more effort — but remove pressure so winter support often looks like:
- getting outside during daylight, even briefly
- opening curtains and letting natural light in
- walking during the brightest part of the day
- prioritizing sleep and earlier nights
- eating warming, nourishing foods
- supporting the nervous system
- reducing stimulation and over-scheduling
- breathing more deeply
- allowing slower rhythms
Holistically Supporting The Body Through Darker Months
Supporting winter mood is not about forcing energy or overriding the season; it’s about helping the body adapt to light changes, and supporting the systems that regulate mood, energy, and resilience.
Over the years, I’ve seen significant differences in clients affected by darker months when we focus on a few key areas:
1. The Nervous System & Adrenals
The nervous system plays a central role in mood, motivation, sleep, and emotional balance. When light is low and stress is high, the adrenals often work harder to compensate. This is why I often use NSP’s Adrenal Support - a formula of herbs and specific nutrients to help the body feel more grounded, stable, and emotionally supported through seasonal shifts.
2. Mineral & Green Nutrition
Plants like Alfalfa have traditionally been used as deep nourishment for the body. Rich in minerals and phytonutrients, NSP's Alfalfa supports cellular nutrition, energy, and overall vitality — which can make a real difference when the body feels depleted, flat, or heavy during winter months.
3. Adaptogenic & Glandular Support
Formulas such as NSP's AD-C have been particularly helpful for people who feel “wired but tired,” emotionally low, or lacking resilience in winter. These types of blends support the body’s ability to adapt to stress and maintain steadier energy and mood.
These 3 herbal solutions will not override the season — but they can help the body move naturally through it with more ease, stability, and support.