Actimel is a widely recognized fermented milk drink, often categorized as a functional food due to its emphasis on beneficial bacteria. Nutritionally, it is formulated primarily as a source of carbohydrates, predominantly simple sugars and lactose, providing immediate energy. A typical 100g serving delivers approximately 75 kilocalories, making it a relatively low-calorie dense food when consumed in its standard portion size (usually 100ml). The macronutrient profile highlights its high carbohydrate content, around 11.5 grams per 100g, with the majority being sugars (around 10.5 grams). This sugar content is important for both palatability and acting as a substrate for the live bacterial cultures.

The protein content is modest, sitting around 2.8 grams per 100g, sourced from the dairy base, offering essential amino acids necessary for muscle repair and general cellular function. The fat content is intentionally low in most variants, typically around 1.5 grams per 100g, minimizing caloric intake from lipids, though it contains small amounts of saturated fats (around 1.0 gram). Cholesterol levels are minimal.

What truly distinguishes Actimel in a nutritional context is its fortification strategy, particularly regarding micronutrients and its signature probiotic culture, Lactobacillus casei Danone (L. casei CNCM I-1518). It is an excellent source of certain vitamins crucial for immune function. Specifically, it is fortified with Vitamin D and Vitamin B6. Vitamin D (around 1.5 micrograms per 100g) plays a pivotal role in calcium absorption and immune system modulation, while Vitamin B6 (around 0.21 milligrams per 100g) supports metabolism and neurological function. While dairy naturally provides calcium (around 120 milligrams), the inclusion of these specific vitamins enhances its functional health claims. As a fermented product, it is virtually devoid of dietary fiber. Overall, Actimel is designed as a convenient, nutrient-enhanced dairy supplement focused on digestive and immune system support, best integrated into a balanced diet that accounts for its sugar load.