What characteristic is common among many calming herbs?

Many calming herbs are indeed characterized by their aromatic qualities. Aromatic herbs often contain essential oils that contribute to their calming effects. The fragrance of these herbs can have a significant impact on mood and is often used in aromatherapy to promote relaxation and reduce anxiety. When these aromatic compounds are inhaled or consumed, they can stimulate the olfactory system, influencing emotional responses and enhancing a sense of calm.

In addition to their aromatic nature, calm-inducing herbs are used in various forms, such as teas or extracts, and do not necessarily have to be consumed only at bedtime. While some calming herbs may have a bitter taste due to their phytochemical composition, bitterness is not a defining characteristic of most calming herbs. Likewise, the notion that these herbs are low in nutrients does not apply, as many calming herbs can also provide valuable nutrients and health benefits beyond their soothing effects.