Circadian

Slumbr Chronoreset — Circadian & Jet-Lag Formulation

For a body clock that runs at the wrong time. This is a timing therapy, not a sleep aid.

Chronoreset is not for falling asleep, and it is not taken at bedtime. It is for the patient whose sleep itself is essentially fine — but who falls asleep too late, wakes too late, or whose schedule and body clock are pulling against each other. The night owl who cannot reach sleep until 2 am. The shift-worker fighting their own biology. The eastward traveller who cannot reset.

For timing disorders, the dose is far less important than when you take it. The same 1 mg of melatonin can shift your clock forward, shift it backward, or do nothing at all — depending on the hour you take it relative to your natural melatonin onset.

Melatonin IR · 1 mg sublingual — used chronobiotically. A low physiological dose, taken hours before your target bedtime. The directions card walks you through the timing for delayed-phase, eastward jet-lag, and shift-work. High doses do not phase-shift more strongly — they may saturate receptors and undo the effect.

Bright light therapy — mandatory pairing. Light is the strongest single intervention for circadian timing. Melatonin works because it is paired with timed bright-light exposure — 10,000 lux for 30 minutes is the standard. The light box itself is not part of this product; the directions card explains when and how to use one.

A note on how melatonin is used at Slumbr

The same molecule, at the same 1 mg dose, is used in three of our products — but the timing is different, because the purpose is different.

For falling asleep (Onset Reset): taken 30–45 minutes before bed, as a sleep-support signal.
For sleep that ends too early (Dawn Hold): taken at bedtime, to extend melatonergic support across the back half of the night.
For a body clock running at the wrong time (Chronoreset): taken hours before your target bedtime, as a clock-shifting signal — not as a sleep aid.

Same drug, three different uses. Timing is the variable, and it matters.

Why this is not Dawn Hold or Onset Reset

Those products are taken at bedtime as sleep-onset support and contain glycine. Chronoreset is melatonin alone, taken hours before the bedtime you are trying to reach — its purpose is to move the clock, not to help you fall asleep tonight.

Who this is for

Adults 18 and over with body-clock timing difficulty — delayed phase, advanced phase, shift-work, or eastward jet-lag. Pharmacist-gated at point of sale.

Beyond the formulation

Entrenched circadian disorders often benefit from behavioural chronotherapy alongside this protocol; a Slumbr consultation discusses the right pathway. Where it fits your situation, the consultation can discuss or signpost CBT-I for any overlapping insomnia.

Safety

Not for use in pregnancy, breastfeeding, or under 18. Avoid in autoimmune disease. Tell your pharmacist if you take fluvoxamine, oestrogens, or high-dose caffeine supplements.

Safety note

Supports healthy sleep timing and circadian rhythm. CONTAINS MELATONIN — marketed for jet-lag/sleep-timing support (SA SAHPRA S0 carve-out fits this product most cleanly). NOT a treatment for insomnia. Pair with morning light exposure for the strongest effect. Responsible pharmacist to confirm final wording before launch.

Adults whose sleep is happening at the wrong clock time — night owls, shift work, jet-lag, irregular schedules.

Melatonin IR — 1 mg (sublingual) — used chronobiotically

Bright light therapy is a mandatory adjunct (10,000 lux × 30 min protocol — see directions). The light box itself is NOT supplied with this product.

Note: v3 (2026-05-26) retired glycine from this phenotype — comfort agents are mechanism-wrong for a timing disorder.

Timing is the therapy — not the dose. 1 mg is the correct chronobiotic dose; higher doses do NOT phase-shift more strongly.

• Delayed sleep-phase (night owl): take 1 mg sublingual ~5–6 hours before current sleep onset. As sleep gradually advances earlier over 1–2 weeks, advance the dose by ~30 minutes every few days.
• Jet-lag (eastward): take 1 mg at destination bedtime on arrival and for 2–4 nights after.
• Shift-work: take 1 mg 30 minutes before planned daytime sleep.

ALWAYS pair with bright light therapy — 10,000 lux × 30 min immediately on waking (delayed phase) or in the early evening (advanced phase). Bright light is the strongest single intervention for circadian disorders; melatonin enhances it.