The Truth About Hunger: What Your Body Is Telling You
Have you skipped lunch because you weren’t hungry, only to find yourself raiding the fridge at midnight? Or maybe you’re so busy that hunger barely registers until you’re shaky and irritable. If so, you’re not alone.
Hunger isn’t just a rumbling stomach or a fleeting craving; it’s your body’s sophisticated way of keeping you alive, energised, and thriving. Yet, in our busy, modern world, many people ignore or misinterpret these vital signals, leading to undereating, fatigue, and even bingeing cycles.
Let’s explore the science of hunger, why rigid meal patterns don’t suit everyone, and how you can reconnect with your body’s natural rhythms to feel your best.
How Hunger Works
Your body uses a network of sensors and hormones to monitor its energy needs and prompt you to eat:
Stomach Stretch Receptors: Your stomach contains stretch receptors that detect whether it is full or empty. When empty, these receptors send signals via the vagus nerve to the hypothalamus in your brain, the control centre for hunger. As you eat and your stomach stretches, these signals change, telling your brain that you are becoming full and you “stop” eating.
Liver Communication: The liver isn’t just for detox; it plays a key role in appetite regulation. It senses changes in energy stores and sends signals to the brain, influencing hunger and fullness. The liver monitors your body’s energy status. It senses blood glucose levels and sends messages to the brain when energy is running low, prompting feelings of hunger. Low blood sugar can cause shakiness, lightheadedness (2/3 of blood sugar is used by the brain), and irritability.
Hormonal Messengers:
Several hormones regulate hunger and fullness:
Ghrelin: Often called the ‘hunger hormone’, ghrelin is produced in the stomach and rises before meals to stimulate appetite.
Leptin: Secreted by fat cells, leptin signals satiety to the brain, helping to suppress appetite.
Insulin: Released by the pancreas in response to carbohydrate intake, insulin helps regulate blood sugar and can influence hunger.
Cholecystokinin (CCK) and Peptide YY: These gut hormones are released during digestion and promote feelings of fullness by slowing stomach emptying.
In addition to a growling stomach, other signs of hunger can include lightheadedness, irritability, trouble concentrating, and headaches.
Why Ignoring Hunger Can Backfire
Skipping meals may seem harmless, but your body will eventually demand the energy it’s missing. This can lead to:
Intense cravings and overeating later
Low energy, poor focus, and mood swings
Nutrient deficiencies and slower recovery from illness or injury
Your body isn’t working against you; it’s simply asking for the fuel it needs to function at its best.
Rethinking the “Three Meals a Day” Rule
Contrary to popular belief, eating three meals daily is a relatively modern, Western invention, rooted in industrial work schedules, not biology. Our ancestors often ate one or two main meals, with flexible timing based on food availability and activity.
What matters most:
Consistency in energy intake
Listening to your body’s true hunger and fullness cues
Adapting your eating pattern to your lifestyle, health needs, and food choices
For some, especially those on paleo, keto, or carnivore diets, or practising intermittent fasting, longer gaps between meals can be beneficial. High-fat or high-protein meals take longer to digest (sometimes up to 16 hours), and some people thrive with fewer, larger meals or periodic fasting.
Intermittent fasting, which involves longer overnight fasts or fasting on certain days, has gained popularity for potential benefits like improved insulin sensitivity, weight management, and mental clarity. It may also help with appetite regulation. However, it’s not for everyone; finding what works for your body and lifestyle is key.
The idea that everyone should eat breakfast, lunch, and dinner at set times each day feels so normal that it’s easy to assume it’s “natural” or universal. The three-meal-a-day routine is a relatively recent social invention shaped by centuries of cultural, economic, and technological change. Here’s how it came to be, and what people did for millennia before this routine took hold.
How Did Three Meals a Day Begin?
Ancient Civilisations:
The earliest records of three daily meals appear in Ancient Rome and Ancient China. Ancient Greeks, Biblical Hebrews, and Babylonians often ate just once or twice a day, with meal timing influenced by climate, work, and food availability.Medieval Europe:
For much of medieval Europe, most people ate two main meals: a hearty meal at midday (dinner) and a lighter meal (supper) in the evening. Breakfast was rare and often reserved for children, the elderly, or manual labourers needing early energy.The Shift in Northern Europe:
By the 16th and 17th centuries, especially in Northern Europe, the pattern began to change. The rise of towns, longer working hours, and more reliable food supplies made it practical for people to eat a light meal (breakfast) early, a midday meal (lunch), and an evening meal (dinner or supper).
In the 16th century, the British Royal Navy formalised three meals a day for its sailors to fit with shipboard routines, and this pattern gradually influenced wider society.Industrial Revolution:
The Industrial Revolution, which occurred in the late 1700s and 1800s, cemented the three-meal structure. Factory work required people to eat before leaving home, and artificial lighting allowed for later dinners. Set meal times became the norm for workers and families alike.
Why Did People Eat Differently Before?
Practicality & Food Scarcity:
Before the modern era, food was less reliably available, and cooking was labour-intensive. Most people preferred two main meals, with snacks as needed. In agricultural societies, meal timing often depended on daylight and the demands of farm work.Class & Climate:
Wealthier households and those in colder climates sometimes ate more often, but for most, the idea of three structured meals would have seemed odd or even wasteful.
How Did Hunter-Gatherers Eat?
Flexible, Responsive Eating:
For hundreds of thousands of years, humans lived as hunter-gatherers. There was no concept of “mealtimes.” People ate when food was available and when they were hungry.Diet Composition:
Plants: Tubers, fruits, berries, nuts, seeds, and roots made up a large proportion of calories.
Animal Foods: When available, meat, fish, eggs, and insects were eaten, with the exact mix varying by season and geography.
Snacking and Feasting: Eating patterns were dictated by the food supply. People might go long without eating, then feast when a big kill or harvest was made.
Physical Activity: Daily life was highly active, involving foraging, hunting, and travelling, influencing when and how much people ate.
No Rigid Meal Structure:
Hunter-gatherers didn’t eat at set times. Instead, they responded to hunger and opportunity. Meals were irregular, and “snacking” was common, especially as people moved through landscapes gathering whatever was ripe or in season.
What Does This Mean for Us Today? Key Takeaways:
Three meals a day is a modern invention, not a biological necessity.
For centuries, most people ate one or two main meals, with snacks as needed.
Hunter-gatherers ate flexibly, in response to hunger and opportunity, not a clock.
Listening to your body’s hunger cues and adapting your eating pattern to your lifestyle and health needs aligns more with our evolutionary past than rigid meal schedules.
“Early humans were nomadic. Forming small communities, they would travel with the seasons, following local food sources.
The development of agricultural knowledge some 12,000 years ago gave rise to permanent settlements.
Permanent agriculture led to the production of a surplus of food. The ability to stay in one place with food on-hand meant the time it took to cook no longer mattered as much.
It quickly became common to eat one light meal early in the day, followed by a larger hearth-prepared meal later on. The specific timings would have varied between groups.”
How to Reconnect with Your Hunger Cues
Modern life, chronic dieting, and stress can dull your ability to sense true hunger. If you’ve lost touch with your body’s natural hunger cues, there are effective ways to rebuild this connection:
— Mindful Eating
Before eating, pause and assess your hunger on a scale from 1 (starving) to 10 (feeling full).
Eat slowly, savouring each mouthful, giving full attention to taste, texture, and aroma.
Notice how your body feels during and after eating.
— Keep a Hunger Journal
Track when you eat and how hungry you feel before and after meals.
Identify patterns or emotional triggers that influence your eating.
Monitor dips in energy, especially when you crash (after consuming sugar-rich, high-calorie snacks with or without caffeine).
— Eat Regularly
Aim for meals or snacks every 3 to 5 hours to stabilise blood sugar and rebuild hunger cues. Adapt food intake to expenditure. If you sit all day and have little physical activity, you will require fewer calories and may not need large meals. Small, light meals may be a better option to keep you on top of physical and mental performance without exceeding your recommended calorie intake and storing extra calories as fat.
Include nutrient-dense foods with protein, healthy fats, fibre, and colourful vegetables, to feel fuller for longer and balance blood sugar levels.
— Hydration
Drink plenty of water throughout the day, as thirst can sometimes be mistaken for hunger.
Avoid sugary and/or caffeinated drinks that may lead to energy dips and crashes.
— Challenge Food Rules
Avoid categorising foods as ‘good’ or ‘bad’. Satisfaction and enjoyment are key to a healthy relationship with food. If eating brings stress, you have already lost the battle. This also suppressed appetite and digestive function, leading to maldigestion and common IBS-like symptoms.
— Address Emotional Eating
Learn to differentiate physical hunger from emotional hunger.
Develop alternative coping strategies for stress and boredom, such as walking, journaling, or deep breathing.
If anxiety or fear of judgment makes eating difficult, especially in social settings:
Start with small, comfortable snacks and gradually expand your comfort zone.
Surround yourself with supportive people.
Practice self-affirmations and challenge negative thoughts.
Remember: Nourishing your body is self-care, not something to feel guilty about.
Take the Next Step: Book a Consultation or Join “The 30-Day Reset”
Hunger is your body’s way of guiding you toward health, not something to fear or ignore. Whether you thrive on three meals, two, or a flexible fasting schedule, listening, responding, and nourishing yourself with intention is the most important step.
Ready to reconnect with your hunger cues, improve your energy, and build a positive relationship with food?
Book a naturopathic consultation tailored to your unique needs and lifestyle for personalised support.
Join “The 30-Day Reset” programme to reset your eating habits, restore your natural hunger signals, embrace intuitive, empowered eating, and reconnect with food and your body.
Your body is constantly communicating. Are you ready to listen?
References
Ahima, RS. Antwi, DA. (2008). Brain regulation of appetite and satiety. Endocrinology and Metabolism Clinics of North America. 37(4), pp. 811-23. doi:10.1016/j.ecl.2008.08.005
Anderson, E. N. Everyone Eats: Understanding Food and Culture. New York University Press, 2014.
Austin, J. Marks, D. (2009). Hormonal regulators of appetite. International Journal of Pediatric Endocrinology. 2009, 141753. doi:10.1155/2009/141753
Clarke, GS. Page, AJ. Eldeghaidy, S. (2024). The gut-brain axis in appetite, satiety, food intake, and eating behavior: Insights from animal models and human studies. Pharmacology Research & Perspectives. 12(5), e70027. doi:10.1002/prp2.70027
Cordain, Loren. The Paleo Diet: Lose Weight and Get Healthy by Eating the Foods You Were Designed to Eat. Wiley, 2002.
Fam, BC. Joannides, CN. Andrikopoulos, S. (2012). The liver: Key in regulating appetite and body weight. Adipocyte. 1(4), pp. 259-264. doi:10.4161/adip.21448
Freedman, Paul. Food: The History of Taste. University of California Press, 2007.
Kaplan, Hillard, and Kim Hill. “The Evolutionary Ecology of Human Food Sharing.” Evolutionary Anthropology, vol. 8, no. 1, 1999, pp. 61–71.
López-Méndez, I. Maldonado-Rojas, ADC. Uribe, M. et al. (2023). Hunger & satiety signals: Another key mechanism involved in the NAFLD pathway. Frontiers in Endocrinology (Lausanne). 14, 1213372. doi:10.3389/fendo.2023.1213372
Montanari, Massimo. Food is Culture. Columbia University Press, 2006.
Mintz, Sidney W. Sweetness and Power: The Place of Sugar in Modern History. Penguin Books, 1985.
Pollan, Michael. In Defence of Food: An Eater’s Manifesto. Penguin Press, 2008.
Richardson, R. Ma, D. (2025). We started eating three meals a day in the 16th century - here’s why. The independent. Available at: https://www.independent.co.uk/life-style/three-meals-a-day-history-b2730883.html
Williams, EK. Chang, RB. Strochlic, DE. et al. (2016). Sensory neurons that detect stretch and nutrients in the digestive system. Cell. 166(1), pp. 209-21. doi:10.1016/j.cell.2016.05.011
Wrangham, Richard. Catching Fire: How Cooking Made Us Human. Basic Books, 2009.
Yeung, AY. Tadi, P. (2025). Physiology, Obesity Neurohormonal Appetite And Satiety Control. StatPearls Publishing.
Source:
Harvard, TH. Chan School of Public Health. The Nutrition Source: Meal Patterns and Timing. Available at: https://www.hsph.harvard.edu/nutritionsource/meal-patterns-and-timing
National Geographic. “What Did Our Ancestors Eat?” Available at: https://www.nationalgeographic.com/science/article/human-evolution-diet-ancestors-food
Gastrointestinal Society & Canadian Society of Intestinal Research
British Dietetic Association
NHS UK
King’s College London
National University of Natural Medicine
National Institutes of Health
Metabolic Research Center