The key difference between Huel Black Edition and v3.1 is the macronutrient split and sweetener.
Black Edition is a lower-carb, higher-protein meal without oats, making it naturally gluten-free. It has 50% fewer carbs and 33% more protein than Powder v3.1. Instead of sucralose, it uses organic coconut sugar and stevia for natural sweetness, plus green tea extract for antioxidants.
Nutritional values per 400 kcal serving:
Carbs: 17g (vs. 39g in v3.1)
Fat: 18g (vs. 12g in v3.1)
Protein: 40g (vs. 30g in v3.1)
Fibre: 6.6g (vs. 7.8g in v3.1)
Learn more about Black Edition here and Huel Powder V3 here.