How much? Sugar measured by the teaspoon as a seasoning is likely harmless. You could use an unrefined one like date sugar or sucanat if you want some nutrients with it. If you're trying to minimize fructose or calories then maybe a granulated erythritol or monkfruit product.
Blackstrap molasses is nice in liquid sauce too.
Lots of: urban hiking, cycling, sprinting
Lots of: fresh meat, seafood, eggs, organs, tubers, starch fruits, vegetables, meat fat, dairy fat, oil fruits
Some: cured meat, dairy protein, sweet fruits, rice, pulses, tree nuts, oil seeds
Minimal: soy, refined proteins, sugar, liquid carbohydrate, grains, refined oils, peanuts