What Causes Afternoon Energy Crashes and How to Avoid Them

If you regularly find yourself feeling sluggish a few hours after lunch, you’re not alone. Afternoon energy crashes are a common complaint, often bringing symptoms such as fatigue, brain fog, irritability, or difficulty concentrating.

While a busy schedule or lack of sleep can certainly contribute, recurring afternoon fatigue may also be influenced by blood sugar fluctuations, stress, hormone balance, and overall metabolic health.^1,2,3,4

Founded by board-certified OB-GYN Dr. Enrique G. Jacome, Pellecome® is dedicated to helping patients and providers better understand how hormone health influences overall wellness, including metabolism, vitality, and healthy aging.

Blood Sugar Fluctuations Can Affect How You Feel

One of the most common contributors to afternoon fatigue is a rapid rise and fall in blood sugar. Significant fluctuations in blood glucose levels can affect both physical energy and mental focus.¹

Meals high in refined carbohydrates and added sugars can cause glucose levels to rise quickly, followed by a sharp decline that may leave you feeling tired, hungry, or distracted.

Balanced meals that include protein, healthy fats, and fiber help slow digestion and support steadier blood sugar levels throughout the day.¹

Stress Can Take a Toll on Daily Energy

Stress influences many systems throughout the body, including those involved in metabolism and hormone regulation. When you encounter physical or emotional stress, your body releases cortisol, a hormone that helps regulate blood sugar, energy availability, and the body’s stress response. Cortisol plays an important role in helping the body respond to stress.²

Although cortisol is essential for normal function, ongoing stress can disrupt healthy hormone signaling. Research suggests that chronic stress may affect metabolism, mood, and mental clarity, contributing to fatigue over time.²

Incorporating stress-management strategies such as regular physical activity, mindfulness practices, relaxation techniques, and healthy sleep habits can play an important role in maintaining overall wellness and supporting healthy cortisol function.

Hormones and Metabolic Health Matter, Too

Feeling alert and energized depends on more than calorie intake alone. Hormones help regulate metabolism and how the body uses energy.

Researchers have increasingly studied DHEA (dehydroepiandrosterone) because of its role in hormone production and metabolic function. DHEA is a hormone precursor that naturally declines with age. Research suggests DHEA may help support cellular energy production and healthy metabolic function.³

Persistent fatigue should not always be ignored. A large population-based study found associations between fatigue and several cardiometabolic conditions, highlighting the importance of paying attention to symptoms that continue over time.⁴

Practical Ways to Support More Consistent Energy

Although the causes of fatigue vary from person to person, several healthy habits can contribute to steadier daytime alertness and improved overall wellness

To stay ahead of energy crashes:

• Choose balanced meals that include protein, fiber, and healthy fats.
• Stay well hydrated throughout the day.
• Prioritize consistent, high-quality sleep.
• Incorporate regular physical activity into your routine.
• Practice healthy stress-management techniques.
• Discuss persistent fatigue or wellness concerns with a qualified healthcare provider.

Supporting Healthy Energy and Wellness

Founded by board-certified OB-GYN Dr. Enrique G. Jacome, Pellecome® remains committed to helping patients and healthcare professionals better understand the connection between hormones, metabolism, and overall wellness.

Blood sugar regulation, stress, hormone balance, and metabolic health can all influence how you feel throughout the day.^1,2,3,4 Understanding these factors may help you take a more proactive approach to long-term wellness and vitality.

If afternoon energy crashes or ongoing fatigue are affecting your quality of life, use the Pellecome® Provider Locator to connect with a healthcare professional in your area and learn more about personalized hormone and wellness support options.

1. Schwarz PEH, Timpel P, Harst L, Greaves CJ, Ali MK, Lambert J, et al. Blood sugar regulation for cardiovascular health promotion and disease prevention: JACC health promotion series. J Am Coll Cardiol [Internet]. 2018;72(15):1829–44. Available from: http://dx.doi.org/10.1016/j.jacc.2018.07.081
2. Knezevic E, Nenic K, Milanovic V, Knezevic NN. The role of cortisol in chronic stress, neurodegenerative diseases, and psychological disorders. Cells [Internet]. 2023;12(23):2726. Available from: http://dx.doi.org/10.3390/cells12232726
3. Li C-J, Lin L-T, Tsui K-H. Dehydroepiandrosterone shifts energy metabolism to increase mitochondrial biogenesis in female fertility with advancing age. Nutrients [Internet]. 2021;13(7):2449. Available from: http://dx.doi.org/10.3390/nu13072449
4. Bian K, Zhang P, Xu G, Sun W. The association between fatigue and cardiometabolic diseases: Insights from the UK biobank study. J Affect Disord [Internet]. 2025;371:261–7. Available from: http://dx.doi.org/10.1016/j.jad.2024.11.040