Awful fasting / low carb armpit smell?
This only happens when I do IF / eat only at night, even at maintenance.
To me it smells awful and I can't even stand to smell myself.
I guess the only solution is eat carbs throughout the day?
Half-way measures don't get very far. You can only do one thing well at a time. Trying to gain muscle while losing fat will result in failure.
Get to 10% bodyfat first while lifting weights heavy 3x a week with reduced volume. Two weeks maintenance. Bulk up slowly (1 lb weight gain per week max), focus on getting stronger, measure body composition changes often.