Chamomile helped with sleep onset latency in three of four studies, and reduced the number of awakenings during the night in two of three studies, though it did not affect daytime functioning
In Long COVID and ME/CFS, it appears that this biological "circuit breaker" gets stuck in the off position long after the initial virus has been cleared, leaving the patient in a state of perpetual, severe energy depletion
Ketogenic diet in children and adolescents: The effects on growth and nutritional status
That being said, some people may have low levels of glutathione due to illness, stress or a poor diet, so supplements are often recommended
Fletcher MA, Zeng XR, Barnes Z, Levis S, Klimas NG