
Understanding labels and ingredients
How to Read Supplement Labels Like a Pro
Today, there's a huge variety of dietary supplements on the market that promise to improve our health, strengthen our immune systems, and provide many other benefits. However, not every supplement delivers on its promises. To ensure you choose a high-quality product, it's essential to read food labels correctly. Supplement labels contain valuable information about the ingredients, dosage, quality, and effects of the product. In this article, you'll learn how to correctly decipher labels, which factors are especially important, and how to find products that truly support your health goals.
Why is reading labels so important?
Today, it's become more difficult for consumers to distinguish between genuine health benefits and marketing claims. Many dietary supplements contain unnecessary additives, fillers, or synthetic ingredients that can compromise the product's effectiveness. Furthermore, there are numerous products that advertise promised benefits but show little to no effect in practice.
Reading labels correctly is crucial not only to avoid contaminants or inappropriate ingredients, but also to assess the bioavailability of nutrients. Bioavailability describes how efficiently the body can absorb and utilize the nutrients from a supplement. A product that is poorly formulated or contains inferior ingredients may not provide the desired benefits—even if the ingredient list looks impressive.
Step 1 : The list of ingredients – what’s really in it?
The list of ingredients on a label is one of the most important pieces of information you should consider when purchasing a dietary supplement. It indicates which active and inactive ingredients are contained in the product. It is usually listed in descending order of quantity—meaning the first ingredient is present in the largest amount. This order can help you assess the quality of the product.
What you should pay attention to:
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Active ingredients: These are the main components that provide the product's health benefits. For example, a multivitamin may contain vitamin C, magnesium, or zinc. Make sure the active ingredients are present in the correct dosage and bioavailability to ensure they are truly effective.
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Fillers and excipients: Many dietary supplements contain fillers such as magnesium stearate, cellulose, or silicon dioxide to add structure or facilitate manufacturing. While these are generally safe, you should prefer products that contain little to no fillers.
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Sugar and artificial sweeteners: Beware of products that contain excessive amounts of sugar, glucose, or sweeteners such as aspartame, acesulfame, or sorbitol. These ingredients can not only reduce the nutritional value of the product but also pose health concerns if consumed regularly.
Step 2: Nutritional information – What nutrients does the supplement provide?
In addition to the list of ingredients, the nutrition facts on the label provide further important information about how much of a particular nutrient is contained in each serving. Typically, the amounts of calories, fats, carbohydrates, proteins, vitamins, and minerals are listed here.
Key figures:
Calories: It's important to know how many calories a serving contains, especially if you're watching your calorie intake. Many supplements, especially protein powders or weight-loss products, can provide additional calories that affect your overall energy expenditure.
Fat, carbohydrates, and protein: These macronutrients are especially important for people following a special diet (e.g., low- carb or high-protein). Make sure the amount of saturated fat and sugar is within acceptable limits.
Micronutrients: Vitamins and minerals are particularly important and are often indicated on labels as a percentage of the recommended daily intake (NRV = Nutrient reference values ). Make sure that the dosage matches your specific needs and is not too high, as an overdose of micronutrients can be harmful to your health.
Step 3: Dosage – How much is enough?
Another crucial criterion for choosing the right dietary supplement is the dosage of the ingredients. The label usually lists the recommended dosage per serving. This dosage is based on general recommendations for the respective target group and is usually designed to meet the standard needs of adults.
Make sure the product contains an adequate dose of the active ingredients without exceeding the recommended daily amount. Excessive intake of certain vitamins (such as fat-soluble vitamins K, E, D, and A) or minerals can lead to side effects such as nausea, headaches, or even serious health problems in the long term.
Step 4: The additives – What should be avoided?
In addition to the main ingredients, there are many additives used in dietary supplements to stabilize the product or make it easier to take. Some of these additives are completely harmless, while others can be potentially harmful.
Artificial colors and flavors: These can be found in many products to enhance the taste or appearance. However, they should only be included in a product when absolutely necessary, as many of these additives can cause allergic reactions.
Fillers and binders: Magnesium stearate, cellulose, or silicon dioxide are often used to bulk up the supplement without providing any health benefits. Make sure these ingredients are included in minimal amounts.
Step 5: Certificates and quality seals – How do I recognize a high-quality product?
Certificates and quality seals provide information about how the supplement was produced and which standards it meets. Look for the following seals:
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Organic certificates: Food supplements bearing the organic seal are from controlled organic farming and do not contain synthetic pesticides or fertilizers.
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Vegan certification: If a supplement carries the vegan seal, it means it contains no animal products or by-products and is therefore suitable for a plant-based diet. Vegan-certified products offer an ethical alternative for people who want to avoid animal products.
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Allergen-free: Products labeled as allergen-free do not contain common allergens such as gluten, lactose, soy, or nuts. These certifications are especially important for people with food allergies or intolerances, as they minimize the risk of allergic reactions.
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Fair Trade Seal: This seal ensures that the raw materials were sourced under fair working conditions and at a fair price.
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GMP certification: GMP stands for Good Manufacturing Practice and indicates that the product was manufactured under strict quality controls.
Step 6 : Shelf life and storage – How long does the supplement remain effective?
Many labels contain an expiration date or best-before date, which tells you when the product will remain fully effective. Make sure to store the supplement in a cool, dry, and dark place to maintain the stability of the nutrients. High temperatures and light can impair the quality of vitamins and minerals.
Conclusion
Properly reading supplement labels is an important skill that will help you choose the best products for your health. By paying attention to the ingredient list, nutritional information, dosage, and additives, you can ensure you choose a product that meets your needs and is of high quality. By following the basic steps of label reading , you can select the best supplements for your health and effectively support your goals.
Sources:
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Federal Office of Consumer Protection and Food Safety. Overview of food labeling . BVL, https://www.bvl.bund.de/DE/Arbeitsbereiche/01_Lebensmittel/03_Verbraucher/02_KennzeichnungLM/01_Ueberblick/lm_kennzeichnung_lebensmittel_Ueberblick_node.html . Accessed on August 11, 2025.
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Federal Ministry of Food and Agriculture. Food Labeling. BMEL, https://www.bmleh.de/DE/themen/ernaehrung/lebensmittel-kennzeichnung/lebensmittel-kennzeichnung_node.html. Accessed on August 11, 2025.