Were you doing maintenance workouts at the same time? The human body, counterintuitively, consumes muscle mass first before fat when it is not in active use. Th

Were you doing maintenance workouts at the same time? The human body, counterintuitively, consumes muscle mass first before fat when it is not in active use. Thus to maintain musculature you need to maintain not just protein but activity. A ketogenic diet, from the literature I have read, has no actual benefit in terms of body fat loss. This is due to the fact that the metabolic pathways shift, but towards dietary fats first and foremost. The pathways that eat muscle and then body fat continue to exist, meaning muscle tone is still at risk without a proper workout regime. However, I am glad to hear it worked for you! At the end of the day what matters is you reached your fitness goals and can maintain them in a healthy lifestyle.