What are the ingredients in the 1 1 diet product?

January 2, 2026 •

2 min read

With over 35 meal replacement products available, the 1:1 Diet offers a variety of options designed for weight loss and maintenance. This guide explains exactly what are the ingredients in the 1 1 diet product, covering the core components found in their shakes, bars, and savory meals.

Quick Summary

The 1:1 Diet products rely on a foundation of soy and milk proteins, complex carbohydrates, and essential fats to provide balanced nutrition in a low-calorie format. All products include a comprehensive vitamin and mineral blend and vary with specific ingredients for flavor and texture.

Key Points

Core Ingredients: The 1:1 Diet products are built on a base of soy and milk proteins, complex carbohydrates like maltodextrin, and a comprehensive vitamin and mineral blend.
Product Variety: Ingredients vary depending on the product type, with shakes using milk powder and inulin, bars using glucose syrup, and savory snacks incorporating vegetable proteins and starches.
Micronutrient Fortification: Every meal replacement product contains a 'Compound vitamin and mineral mixture' to ensure it provides essential micronutrients, including a wide array of vitamins and minerals.
Allergen Awareness: Common allergens such as milk, soy, and gluten may be present, and many products carry specific warnings about nut or sesame seed allergies.
Sweeteners and Additives: The products use artificial sweeteners like sucralose and acesulfame K, along with stabilizers such as xanthan gum, to achieve the desired taste and texture.

The Foundational Components of the 1:1 Diet

The 1:1 Diet, originally known as the Cambridge Weight Plan, offers a variety of nutritionally complete meal replacement products. While specific ingredients differ between products, core components ensure essential macronutrients are provided at a reduced calorie level.

Protein Sources

Protein is key for satiety and muscle maintenance during weight loss. The products primarily use a combination of Soya protein isolate and Milk protein or Skimmed milk powder.

Carbohydrates and Fibre

Carbohydrates provide energy, while fiber supports digestion. Common sources include Maltodextrin, Wholegrain oat flour and rolled oats (in porridge), and added fiber like Inulin. Savory snacks use vegetable sources like potato flakes and fava beans.

Vitamins, Minerals, and Additives

To ensure nutritional completeness, all 1:1 Diet products are fortified with a "Compound vitamin and mineral mixture". This blend typically includes a wide range of essential vitamins (e.g., A, C, D, B vitamins) and minerals (e.g., Potassium, Calcium, Iron, Zinc).

Additives are used for texture, flavor, and preservation, such as Sweeteners (sucralose, acesulfame K), Stabilisers (xanthan gum), Emulsifiers (soya lecithin), and Antioxidants (ascorbyl palmitate, citric acid).

Ingredients by Product Category

Ingredients are tailored to specific product types:

1. Shakes and Smoothies Base ingredients like skimmed milk powder, maltodextrin, and soya protein isolate are used. Smoothies may add oats and fruit.

2. Bars and Bites Often contain milk and soya proteins, glucose syrup, and oligofructose for texture, along with flavorings and coatings. Savory Pop Squares use fava bean, pea protein, and potato.

3. Savoury Meals and Soups Contain protein sources like textured soya protein and skimmed milk powder, along with specific components like pasta in Spaghetti Bolognese and various seasonings in soups.

Allergen Information

Products commonly contain allergens like milk (skimmed milk powder, milk protein) and soy (soya protein isolate, soya flour, soya lecithin). Some items may contain gluten. Warnings about nuts and sesame seeds are also common. Always check individual product packaging for the most accurate allergen details. A specification for a Vanilla Shake provides a detailed example.

Comparison of 1:1 Diet Product Ingredients


Feature	Vanilla Shake	Milk Protein Bar	Pop Squares (BBQ)
Primary Proteins	Soya, Skimmed Milk	Milk Protein, Soya	Fava Bean, Pea Protein
Key Carbohydrates	Maltodextrin, Inulin	Glucose Syrup	Potato Flakes, Potato Starch
Fibre Source	Inulin	Oligofructose	Pea Fibre
Sweeteners	Sucralose, Acesulfame K	Sucralose, Acesulfame K	Sugar (in seasoning)
Thickeners/Stabilisers	Xanthan Gum	Guar Gum	-
Fats	Conjugated Linoleic Acid	Sunflower Oil, CLA	Sunflower Oil
Vitamins/Minerals	Compound mix	Compound mix	Trace minerals

Conclusion

The 1:1 Diet products are formulated with a base of protein, carbohydrates, and fats, comprehensively fortified with vitamins and minerals to provide complete nutrition in a low-calorie format. The specific ingredients that are in the 1 1 diet product vary across the range to offer diverse flavors and textures, from shakes and bars to savory meals. The high protein content aids satiety, supporting weight loss plans. Due to the presence of common allergens like soy and milk, consumers should always review the ingredient list on individual product packaging.

Frequently Asked Questions

The primary protein sources in 1:1 Diet shakes are typically a combination of soy protein isolate and skimmed milk powder, providing a balanced and complete protein profile.

Some 1:1 Diet products are suitable for vegetarians, but not all. The website indicates that some items, like Pop Squares, are vegan, but others contain milk or other animal-derived ingredients. Always check the specific product label.

The 1:1 Diet products commonly use non-caloric artificial sweeteners such as sucralose and acesulfame K to provide sweetness without adding to the calorie count.

Yes, many 1:1 Diet products contain common allergens such as milk and soy. The ingredient lists clearly state these, and warnings regarding potential cross-contamination with nuts or sesame seeds are also common.

Yes, the savory meals and snacks, including items like soups and Pop Squares, are designed to be nutritionally complete meal replacements, containing a balanced mix of protein, carbs, fats, vitamins, and minerals.

The products are formulated to be low-calorie by using a precise blend of nutrient-dense ingredients like protein and fiber, controlling carbohydrate content, and using non-caloric sweeteners.

Specific ingredient lists for each 1:1 Diet product are available on the packaging. You can also find some product specification sheets on the company's website or other food information databases.