Contact: Salimetrics (USA)
- Clinical Laboratory -
Is your circadian rhythm normal,
This at-home sleep study evaluates your actual circadian rhythm
Who Should Perform a Melatonin Levels Test?
A melatonin levels test (circadian rhythm assessment) is ideal for individuals who have one or more of the following:
- Chronic sleep disruptions that have lasted for 14 days or longer
- An interest in starting a melatonin supplement or sleep aid
- Sleep-wake disruptions after starting a new medication or sleep routine
- Trouble falling asleep, staying asleep, or staying awake during the day
- A consistently irregular or non-24 sleep-wake cycle
- Inconsistent results with bright light or behavioral sleep therapy
Note: While any chronic sleep disruption can impact the circadian rhythm, this assessment is generally not ideal for evaluating non-circadian sleep disorders, such as: sleep apnea, sleepwalking, sleep paralysis, night terrors, nocturnal panic attacks, limb movement disorders, or certain types of seizures and epilepsy.
How Does At-Home Melatonin Testing Work?
Step 1
Order Your All-Inclusive Collection Kit
Step 2
Collect Saliva Samples in Dim Light
Step 3
Return Samples to Salimetrics Clinical Lab
Step 4
Get Results via HIPAA Compliant Portal
Step 5
Discuss Results with Your Sleep Health Provider
What Does a Melatonin Levels/Circadian Rhythm Sleep Assessment Measure?
This test measures melatonin levels to evaluate your circadian rhythm (biological clock) using timed saliva samples collected in dim light and shipped to our clinical laboratory. Results can be used to determine circadian rhythm alignment/length, overall melatonin production patterns, the impact of medications, supplements, and optimal timing for sleep aids or supplements, all of which can have a significant impact on your sleep-wake cycle. Learn more about melatonin levels testing below.
What Assessment Do I Order?
You can use the table below to select an assessment based on your current sleep profile, or seek advice based on a recommendation from your sleep-medicine health provider. If your sleep-wake disturbance is more complex or not listed here, you can Ask an Expert to request an assessment recommendation, or speak directly with your sleep medicine health provider.
| Symptom |
Biology of Sleep Assessment |
Collect a Sample |
| Trouble Falling Asleep (within 2 hours of Bedtime) | 7-Sample Onset | Every hour, starting 5 hours before bedtime. |
| Trouble Falling Asleep (within 4 hours of Bedtime) | 9-Sample Onset | Every hour, starting 5 hours before bedtime |
| Trouble Staying Asleep (within 4 hours of Bedtime) | 7-Sample Onset | Every hour, starting 1 hour before bedtime. |
| Trouble Staying Asleep (All Night) | Partial 24-HR Circadian Phase Map | Every 1.5 hours, starting 2 hours before bedtime |
| Trouble Waking Up (within 2 hours of Desired Wake Time) | 7-Sample Offset | Every half-hour, starting at awakening |
| Trouble Staying Awake (within 4 hours of Desired Wake Time) | 7-Sample Offset | Every hour, starting at awakening |
| Trouble Staying Awake (All Day) | Partial 24-HR Circadian Phase Map | Every 1.75 hours, starting 2 hours before awakening |
| Trouble Staying Awake (within 2 hours of Bedtime) | 7-Sample Onset | Every hour, starting 5 hours before bedtime |
| Trouble Staying Awake (within 4 hours of Bedtime) | 9-Sample Onset | Every hour, starting 7 hours before bedtime |
| Irregular Sleep-Wake Routine (varies by more than 1-4 hours every day) | Full 24-HR Circadian Phase Map | Every 2.75 hours, starting at awakening |