rhythm Complete Protocol

Researchers investigated how misalignment between the body’s internal clock and daily schedules affects physiological function under controlled laboratory conditions.

What did they find?

• Cortisol rhythm: Circadian misalignment reversed the normal daily cortisol pattern.
• Glucose regulation: Blood glucose increased during circadian misalignment.
• Leptin levels: Leptin, a hormone involved in appetite regulation, decreased.
• Multiple biological systems: The findings demonstrated that changes in circadian timing can affect hormonal and metabolic processes simultaneously.

These findings show that circadian misalignment can influence several physiological systems in humans.

Study details: Controlled human laboratory study · Circadian misalignment · Assessment of cortisol, glucose and leptin.

Researchers investigated how delaying meal timing affects circadian rhythms in humans, examining clock gene expression in fat tissue alongside blood glucose, cortisol and melatonin rhythms.

What did they find?

• Peripheral clock genes: Delaying meals by five hours shifted clock gene expression in fat tissue.
• Glucose rhythm: The daily rhythm of blood glucose also shifted.
• Different biological signals: Cortisol and melatonin rhythms did not shift in the same way as the peripheral clock markers.
• Biological timing: The findings demonstrate that different biological systems can respond differently to changes in meal timing.

These findings highlight the complexity of circadian regulation and suggest that daily behaviours can influence different biological rhythms in distinct ways. They provide scientific context for RHYTHM’s time structured approach.

Study details: Human laboratory study · Five hour meal delay · Assessment of peripheral clock gene expression, blood glucose, cortisol and melatonin.

Researchers reviewed published studies examining the relationship between the daily cortisol slope and health outcomes. The cortisol slope describes how cortisol levels change from morning to evening.

What did they find?

• Daily cortisol pattern: A flatter daily cortisol slope was associated with poorer health outcomes.
• Mental health: Associations were reported between cortisol patterns and mental health outcomes.
• Physical health: The analysis also identified associations with physical health outcomes.
• Beyond a single measurement: The findings highlight the potential importance of cortisol’s daily pattern, rather than considering hormone levels in isolation.

These findings support the relevance of daily biological rhythms to health.

Study details: Human meta-analysis · 80 studies · Assessment of diurnal cortisol slopes and mental and physical health outcomes.

The body follows daily biological rhythms that influence hormone activity, energy metabolism, physical performance and sleep. These processes are interconnected, yet each follows its own timing.

What does the research tell us?

• Morning activation: The cortisol awakening response is a well documented rise in cortisol after waking. Research into daily alertness and stimulant timing provides scientific context for a morning focused on energy and mental performance.
• Daytime adaptation: Physical performance and metabolic responses can vary with biological time. Research into exercise timing and energy metabolism provides context for a daytime phase focused on metabolic function and physical goals.
• Night time recovery: Melatonin helps regulate the sleep wake cycle. Research shows that evening light exposure can suppress melatonin and delay circadian timing, highlighting the importance of preparing for sleep and protecting the body's natural night time rhythm.
• A coordinated daily approach: Rather than treating the three products as interchangeable, RHYTHM organizes them around different phases of the day, creating a structured routine informed by the biology of daily timing.

The scientific rationale:
Research supports the importance of daily biological rhythms and shows that the timing of physiological processes matters. RHYTHM Complete Protocol applies these principles to a three phase wellness routine, bringing together ingredients selected for distinct daily objectives.The evidence supports the biological rationale behind this approach.

Study details: Human circadian and cortisol research · Exercise timing and metabolic research · Sleep and light exposure research.

Researchers investigated social jetlag, the mismatch between a person’s biological sleep timing and the schedule imposed by work or social commitments. This mismatch can cause people to sleep at different times on workdays and free days.

What did they find?

• Timing mismatch: Work and school schedules can conflict with individual sleep preferences, particularly among people with later chronotypes.
• Sleep debt: People with later chronotypes may lose sleep on workdays and compensate by sleeping later on free days.
• Body weight: A large epidemiological study found an association between social jetlag and higher body mass index (BMI), beyond the association with sleep duration.

These findings suggest that modern schedules can create a mismatch between biological and social timing. The observational evidence identifies an association, not proof that social jetlag directly causes weight gain.

Study details: Human observational research · Sleep timing on workdays versus free days · Chronotype, sleep quality and psychological wellbeing.

Researchers investigated the metabolic effects of prolonged sleep restriction combined with circadian disruption under controlled laboratory conditions. Participants experienced restricted sleep and recurring 28 hour behavioral cycles, followed by a recovery period.

What did they find?

• Resting metabolic rate: Decreased by approximately 8% on average during the combined sleep restriction and circadian disruption phase.
• Glucose regulation: Blood glucose after a meal increased.
• Insulin response: The glucose changes were associated with inadequate pancreatic insulin secretion.
• Recovery: The measured metabolic changes returned towards baseline after nine days of recovery sleep and circadian realignment.

These findings demonstrate that sustained sleep restriction combined with circadian disruption can affect metabolic function.

Study details: Controlled human laboratory study · Healthy young and older adults · Approximately three weeks of sleep restriction and circadian disruption · Assessment of resting metabolic rate and post-meal glucose regulation.

Researchers reviewed how daily biological timing and accumulated sleep pressure influence alertness and performance, including the familiar afternoon dip.

What did they find?

• Afternoon alertness: Alertness can naturally decline during the afternoon as part of the body's daily rhythm.
• Not just lunch: The dip can occur even without eating, suggesting it is not simply caused by a meal.
• Sleep pressure: Performance reflects the combined influence of the body's internal clock and the growing need for sleep.

These findings explain why afternoon sluggishness can occur even during a normal daily rhythm.

Study details: Scientific reviews · Daily alertness, circadian timing and accumulated sleep pressure.

Researchers reviewed evidence examining how psychological and work related factors influence the cortisol awakening response (CAR), the rise in cortisol that typically occurs shortly after waking.

What did they find?

• Work stress: Work related factors were associated with differences in the cortisol awakening response.
• Psychological factors: Worry and psychological stress were among the factors investigated in relation to the morning cortisol pattern.
• Individual variation: The morning response varies between individuals and should not be interpreted as a simple measure of whether someone has enough energy or is experiencing excessive stress.

These findings show that the morning cortisol response is influenced by more than clock time alone. They provide context for the morning activation phase, but do not demonstrate that paraxanthine strengthens or normalises the CAR.

Study details: Human meta-analysis · Cortisol awakening response · Work stress and psychological factors.