The Controversial Change: Animal Rennet in Whey
For many years, consumers assumed that popular chocolate bars like the Mars Bar were suitable for vegetarians, as they contained no obvious meat products. However, this perception was challenged in May 2007 when Mars UK announced a change in its ingredient sourcing. The company revealed that the whey used in its chocolate products—including Mars Bars, Snickers, and Maltesers—would now contain traces of animal rennet. Rennet is an enzyme extracted from the stomach lining of young ruminant animals, such as calves. This revelation instantly rendered the affected chocolate bars unsuitable for vegetarians, causing significant backlash from consumers and vegetarian organizations.
The Consumer Uproar and Reversal
The public outcry was swift and strong. Vegetarian campaigners and even members of parliament voiced their disapproval, calling the move a 'backward step' for food transparency. The company, which had initially claimed the change was a principled decision to be more transparent about its sourcing, quickly realized its mistake. Just one week after the announcement, Mars UK apologized and reversed the decision, promising to return to vegetarian-friendly whey sourcing. This event serves as a powerful example of consumer advocacy and the importance of ingredient disclosure in the food industry. For a time, however, vegetarian consumers were left uncertain about which Mars Bars were safe to eat, as thousands of the non-vegetarian-friendly bars had already hit store shelves.
The Role of Ingredients Beyond Rennet
While the rennet incident was a major factor in the "non-vegetarian" label, it's important to understand the full picture of ingredients that can make a product non-vegetarian, or at least unsuitable for stricter diets like veganism. Milk, for instance, is a primary ingredient in milk chocolate and therefore makes the standard Mars Bar unsuitable for vegans. Other animal-derived ingredients can appear in many confectionery products, often under less recognizable names.
Comparison of Animal-Derived vs. Plant-Based Ingredients in Confectionery
| Ingredient Type | Animal-Derived Source | Plant-Based Alternative | Common Usage in Confectionery |
|---|---|---|---|
| Gelling Agent | Gelatin (from animal bones, skin) | Agar-Agar (from seaweed), Pectin (from fruit) | Gummy sweets, marshmallows, nougat |
| Emulsifier | Some Lecithin (can be from animal sources) | Soy Lecithin, Sunflower Lecithin | Chocolate, ensuring smooth texture |
| Coloring | Cochineal (from crushed insects) | Vegetable-based food colors, Beta-carotene | Red candies and coatings |
| Glazing Agent | Beeswax, Shellac (from lac bugs) | Carnauba Wax (from palm leaves) | Giving a shiny finish to candies |
| Dairy | Milk Solids, Whey Powder (from milk) | Plant-based milk powders, soy protein | Milk chocolate, nougat fillings |
Global Variations and Current Vegetarian Status
It is crucial to recognize that ingredient formulations for Mars products can vary by country. While the 2007 controversy specifically involved Mars UK and was quickly resolved, consumers should never assume that a product is universally vegetarian. Many Mars bars sold globally, particularly in the UK and Ireland, are currently labeled as suitable for vegetarians. This is because the company now sources its whey from vegetarian-friendly microbial rennet. However, vegans must still avoid standard Mars Bars due to the presence of dairy ingredients like milk powder and whey.
The Importance of Label Reading
This history underscores the vital importance of reading ingredient labels, especially for those with dietary restrictions. Food manufacturers can and do change their formulations based on sourcing, consumer demand, and regulatory requirements. An ingredient like whey, which seems harmless, can be produced in different ways that are either vegetarian or non-vegetarian. Likewise, common food additives with E-numbers can sometimes be derived from animal sources. By being vigilant and checking the specific product label, consumers can make informed choices about what they eat.
Conclusion: Navigating a Complex Food Landscape
The story of the Mars Bar and the rennet controversy is a compelling case study in the complexities of the modern food industry. What appears to be a simple, classic candy bar can, beneath the surface, contain ingredients that challenge consumer expectations. For vegetarians, the lesson is clear: assumptions about a product's suitability are not enough. The 2007 incident was a wake-up call for many and led to greater awareness about hidden animal-derived components, from rennet in cheese products to gelatin in many sweets. While the current formulation of Mars Bars in many markets is now labeled vegetarian-friendly, diligent label reading remains the most reliable strategy for those adhering to a vegetarian or vegan diet. The evolving nature of ingredient sourcing requires continuous attention from ethical consumers worldwide.(https://www.mars.com/about/policies-and-practices/farm-animal-welfare) reminds us that Mars has a broad portfolio and practices that can vary across its product range.
