How Ozempic Reduces Hunger
Ozempic, and other drugs with the active ingredient semaglutide, work by mimicking a gut hormone called GLP-1 (glucagon-like peptide-1). Normally, your body releases this hormone after you eat, which signals to your brain that you're full. Semaglutide
activates these same GLP-1 receptors in the brain, effectively telling your body you're satisfied even if you've eaten less. Additionally, the medication slows down the rate at which your stomach empties. This dual-action mechanism—working on both the brain and the stomach—leads to a significant reduction in appetite and calorie intake for many users.
Your Body's Unchanging Needs
While you may be consuming fewer calories, your body’s baseline requirement for micronutrients—the essential vitamins and minerals needed for everything from energy production to immune function—remains the same. When you eat less, you're not just cutting calories; you're also reducing your intake of food that carries these vital nutrients. Studies have shown that people on GLP-1 medications can be at a higher risk for deficiencies in key nutrients like vitamin D, B vitamins, iron, and calcium. This creates a potential paradox: a person can be losing weight while simultaneously becoming undernourished on a microscopic level.
The Risk of 'Hidden Hunger'
This state of being calorie-reduced but nutrient-poor can lead to a condition sometimes called "hidden hunger." Even as the number on the scale goes down, you might start to experience symptoms of micronutrient deficiencies. These can be subtle at first, like fatigue, hair loss, weakened immunity, or changes in your skin and nails. For example, a lack of iron can lead to anaemia, causing weakness and fatigue. Inadequate calcium and vitamin D can compromise bone health, while a B12 deficiency may affect nerve function. Some research even suggests that GLP-1 medications might directly interfere with the absorption of certain nutrients, like vitamin B12, compounding the problem of reduced intake.
Focus on Nutrient-Dense Foods
The key to staying healthy while using Ozempic is to make every bite count. This means prioritizing nutrient-dense foods—foods that are rich in vitamins, minerals, and protein for the number of calories they contain. Healthcare professionals recommend focusing on lean proteins like chicken, fish, eggs, and legumes to help preserve muscle mass during weight loss. Incorporating a wide variety of colourful vegetables and fruits will provide essential vitamins and fibre. Healthy fats from sources like avocados and nuts are also important. Conversely, it's wise to limit 'empty calorie' foods like sugary drinks, processed snacks, and greasy or fried foods, which offer little nutritional value and can worsen common side effects like nausea.
Should You Consider Supplements?
Given the reduced food intake, it's natural to wonder if a multivitamin or other supplements are necessary. While some people may benefit, it's not a one-size-fits-all solution. Some studies have noted deficiencies are more common in users of these drugs, particularly in vitamin D, iron, and B vitamins. However, it's crucial to avoid self-prescribing. Taking certain supplements without a confirmed deficiency, like iron, can cause its own set of problems. The best approach is to have a conversation with your doctor or a registered dietitian. They can assess your individual diet, risk factors, and may recommend blood tests to check for specific deficiencies before suggesting a targeted supplementation plan.
