How do I add flavor without salt?

Garlic, onion, citrus, vinegar, and dried or fresh herbs do most of the work that salt usually gets credit for. Toasting spices, using a squeeze of lemon at the end of cooking, or roasting vegetables until they caramelize all add flavor without reaching for the shaker. A little heat from chili or pepper also helps a dish taste more finished. This is general information, not medical advice.