Whey protein powder: We use Optimum Nutrition Whey Protein Powder as this has a very low sugar and carbohydrate content and is widely available.
Plant protein powder: We use Vega Plant Based Protein Powder as, similar to the whey protein, this has low carbs, additives and is widely available.
Don't worry about needing to match the macros exactly of the protein powders we've used, whatever brand you like and you can easily get hold of will work great.