Health
Trance has been shown to be very psychologically beneficial, by helping to relieve built up stress, allowing one to reflect on life issues without censorship or guilt, and generally giving the psyche respite from operating at alpha or delta states. Trance forms though such as meditation may be contraindicated for certain individuals with a history of mental illness and people on certain psychotropic medications, for example. There have been studies published in defensible journal of peers (provide source) that grace and thanksgiving (for example) vocalised, enacted, thought and felt prior to consumption of meals may assist with digestion and nutrient uptake and utilization by the bodymind (refer Agape feast, eucharist, ganachakra, etc.) Generally, one is only in a theta state for a period of minutes, right before going to sleep, and when waking up. Being in a theta state for 15 minutes is considered to be an 'extended period'. With the use of auditory driving, or other meditative techniques, this time can be extended significantly.