Written by Heather Carrera, Nutrition & Wellness Manager, DCN, MS, CNS, CDN
March was National Sleep Awareness Month, and April follows with National Stress Awareness Month. While these topics are often discussed separately, they are deeply connected—especially for college students or anyone managing a busy schedule.
Sleep and stress influence each other in powerful ways, and nutrition plays a key role in regulating both.
Late nights, irregular meal patterns, caffeine dependence, and high academic or work demands can disrupt the body’s natural rhythms. Understanding how sleep, stress, adrenal function, and nutrition interact can help you make small changes that support better energy, focus, and overall well-being.
The Role of Sleep in Health
Sleep does far more than provide rest. During sleep, the body performs critical maintenance that supports nearly every system.
Adequate sleep helps regulate:
- Appetite and metabolism
- Immune function
- Mood and mental health
- Cognitive performance and memory
- Energy production
- Cellular repair and detoxification
Sleep occurs in cycles lasting about 90 minutes, moving through stages that support both physical and mental restoration. Deep sleep supports immune and muscle recovery, while REM sleep supports memory and emotional processing.
When sleep is consistently disrupted—whether from short sleep duration or waking during the night—these processes are compromised. Over time, poor sleep is linked to increased cravings for sugary foods, reduced concentration, and a higher risk of illness.
The Circadian Rhythm: Your Body’s Internal Clock
The circadian rhythm controls your sleep-wake cycle and responds primarily to light and darkness.
As evening approaches and light decreases, the brain releases melatonin, a hormone that signals the body it is time to sleep. At the same time, cortisol (often called the “stress hormone”) gradually declines, allowing us to feel sleepy.
These hormones work in opposition:
- Melatonin rises → cortisol should be low
- Cortisol is not a darkness hormone, melatonin is
College routines can disrupt this cycle. Late-night screen use, irregular sleep schedules, and stress can all interfere with natural hormone patterns.
Stress, Cortisol, and Adrenal Function
Stress activates the hypothalamic–pituitary–adrenal (HPA) axis, which regulates cortisol release. Over time, chronic stress may also contribute to adrenal disregulation, where the body struggles to utilize cortisol effectively to manage blood sugar, and instead relies on its backup system-adrenaline.
This may lead to:
- Difficulty falling asleep
- Light or interrupted sleep
- Waking feeling unrested
It’s worth noting that the term “adrenal fatigue” is controversial in the medical community and is not a formally recognized diagnosis. However, research clearly shows that chronic stress can disrupt normal cortisol rhythms and the body’s stress-response system.
This can contribute to:
- Fatigue
- Sleep disturbances
- Difficulty managing stree
Cortisol is a sleep maintenance hormone at night, and its backup is adrenaline, so when blood sugar is disregulated, it can cause the body to use adrenaline instead and it wakes us up.
The Often Overlooked Factor: Blood Sugar
Blood sugar regulation plays a key role in sleep quality.
During sleep, the body maintains stable blood glucose levels for 10–12 hours without food. Cortisol helps release stored glucose to support this process.
However, certain eating patterns can disrupt this balance:
- High sugar intake before bed can lead to spikes and crashes.
- Skipping meals may result in low blood sugar at night.
- Irregular eating patterns increase stress on the body’s hormone regulation.
When blood sugar drops too low overnight, the body releases cortisol—often waking you up. Frequent nighttime waking may be linked to these fluctuations.
Nutrition Strategies to Support Better Sleep
Small changes in nutrition can help improve sleep quality.
Eat Balanced Meals: Combine protein, healthy fats, and fiber-rich carbohydrates to support stable blood sugar.
Examples:
- Eggs with whole grain toast and avocado.
- Chicken or tofu with quinoa and vegetables.
- Greek yogurt with nuts and fruit.
Choose Slow-Digesting Carbohydrates at Dinner: Foods like oats, brown rice, quinoa, and sweet potatoes help maintain blood sugar overnight.
Support Neurotransmitter Production: Certain nutrients are involved in the regulation of sleep.
Examples:
- Protein provides tryptophan for serotonin and melatonin production.
- Magnesium and zinc support calming neurotransmitter signaling.
- Vitamin D and iron deficiencies may reduce sleep quality. Consider having your levels tested, and supplementing if deficiency exists.
Be Mindful of Caffeine: Caffeine can linger in the body for hours. Limiting intake later in the day may support better sleep.
Sleep Hygiene Still Matters
Lifestyle habits also play an important role:
- Keep a consistent sleep schedule
- Reduce screen time before bed
- Create a cool, dark, quiet sleep environment
- Get natural sunlight in the morning
Research suggests a key window for restorative sleep occurs between 10:30 p.m. and 2:30 a.m., when many repair processes take place.
Bringing It All Together
Sleep and stress are closely connected, and nutrition supports both.
Poor sleep can increase stress hormones and cravings, while high stress and unstable blood sugar can disrupt sleep.
For college students, improving sleep does not require drastic changes. Small steps—like eating balanced meals, managing stress, and building consistent routines—can support both physical and mental well-being.
Written by Heather Carrera
Nutrition & Wellness Manager, DCN, MS, CNS, CDN
For personalized nutrition support, contact Nutrition & Wellness Manager, Heather Carrera, DCN, MS, CNS, CDN: carrera@geneseo.edu. Book a one-on-one session with Heather here.