6-Sulfatoxymelatonin (1st Morning)
Urinary 6-Sulfatoxymelatonin (MT6s) is the main metabolite of melatonin.
Melatonin assists in the body’s sleep/wake cycle and is also a very powerful antioxidant. Primary production is in the pineal gland. The GI mucosa is a significant source secondary production, with retina, bone marrow, platelets, skin, and lymphocytes all producing smaller amounts. GI-produced melatonin has paracrine effects (=affects adjacent cells) and does not enter general circulation. MT6s itself has no physiologic activity, but is a good indicator of whole body melatonin production. Low urinary MT6s is an indication for melatonin supplementation. It is normal to see elevated urinary values with supplemented doses higher than 1mg.
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What does it mean if your 6-Sulfatoxymelatonin (1st Morning) result is too low?
Low levels of 6-Sulfatoxymelatonin in the first morning urine sample can indicate a disruption in melatonin production or an altered sleep-wake cycle. Melatonin is a hormone produced by the pineal gland in the brain, primarily responsible for regulating sleep-wake cycles or the circadian rhythm. It is typically secreted in response to darkness, peaking during the night and decreasing during the day. 6-Sulfatoxymelatonin is a major metabolite of melatonin, and its presence in urine is a reliable indicator of the body's melatonin production.
When 6-Sulfatoxymelatoni levels are low in the first morning urine, it suggests that the body's melatonin production during the night was insufficient. This insufficiency can be due to various reasons, including prolonged exposure to light at night, especially blue light from screens, which can inhibit melatonin production. Other causes might include stress, aging, shift work, travel across time zones (jet lag), and certain medical conditions or medications that affect the pineal gland or sleep patterns.
Low melatonin levels can lead to sleep disturbances such as difficulty falling asleep, staying asleep, or experiencing restorative sleep. This can further result in daytime fatigue, mood changes, and reduced overall health and well-being.
To address low 6-Sulfatoxymelatoni levels, interventions may focus on improving sleep hygiene and creating an environment conducive to sleep. This includes reducing exposure to blue light before bedtime, establishing regular sleep routines, ensuring a dark and quiet sleeping environment, and possibly using sleep aids like eye masks or white noise machines. In some cases, supplementation with melatonin might be considered, but this should be done under medical guidance. Lifestyle changes such as stress management techniques, regular exercise, and dietary adjustments can also support healthy sleep patterns and potentially improve melatonin production.
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