The thing to remember @Gnomegnomegnome is that a low carb diet is one that is moderate in protein. There is a risk with eating too much protein that you will encourage gluconeogenesis - i.e. turning the protein into glucose.
See here, from healthline.com:
2. Eating too much protein
Protein is a very important macronutrient that most people consume adequate amounts of.
It can improve feelings of fullness and increase fat burning more than other macronutrients (1Trusted Source)
Generally, consuming more protein should lead to weight loss and improved body composition
However, low carb dieters who eat a lot of lean animal foods can end up eating too much protein.
When the body doesn’t have sufficient carbs, amino acids from proteins you eat will be turned into glucose via a process called gluconeogenesis (2Trusted Source).
This can become a problem on very low carb ketogenic diets and prevent your body from going into full ketosis.
According to some scientists, a well-formulated low carb diet should be high in fat and moderate in protein.
A good range to aim for is 0.7–0.9 grams of protein per pound (1.5–2.0 grams per kg) of body weight.
SUMMARY
Excessive protein consumption on a low carb diet can prevent you from getting into ketosis.
Protein is good for muscle repair, but just be careful how much you're consuming - and ask yourself if you really need it after the gym?