Cooldown Nightcap is a nightly drink mix formulated to support a cooler, calmer transition to sleep — without melatonin or next-morning grogginess. Most customers notice a difference within the first 3–5 nights — backed by our 30-night Sleep Guarantee.
Almost none of them know that's why they wake at 3am, throw the covers off, or feel exhausted after a “full night.”
↓ The temperature problem
Source: Gallup, 2023
The problem
Most sleep supplements ignore the temperature problem.
Your body needs to wind down to transition into deep sleep. If you run hot at night, that process is harder — every night. And melatonin doesn't address it.
01
You wake up at 3am overheated
Elevated body temperature at night is one of the leading causes of sleep fragmentation — waking mid-cycle with no clear reason.
02
Melatonin doesn't address it
Melatonin regulates your sleep timing. It does nothing for thermal regulation. That's why it works for jet lag but not for hot sleepers.
03
The hardware solutions are expensive
Cooling mattresses and pads cost $1,500–$3,000. There was no accessible, science-backed nutritional solution — until now.
The solution
Built around your body temperature.
Cooldown Nightcap is formulated around Glycine — an amino acid studied for its role in sleep quality and bedtime comfort for hot sleepers. Combined with four synergistic compounds for full-spectrum sleep support.
Mix one sachet into water 30–60 minutes before bed. That's it.
No fillers. No proprietary blends. Every compound dosed for a reason.
01GlycineAmino acid studied for its role in sleep quality, bedtime comfort, and supporting a cooler, calmer wind-down. The most researched ingredient for hot sleepers.Bedtime comfort
02Magnesium GlycinateThe most bioavailable form of magnesium. Supports muscle relaxation and is associated with improved sleep quality and duration.Deep sleep
03L-TheanineFound naturally in green tea, L-Theanine promotes alpha brain wave activity — a calm, alert state that transitions smoothly into sleep without sedation.Quiet mind
04Affron® (Saffron extract)Patented saffron extract clinically studied for sleep quality improvements. Supports serotonin activity and reduces nighttime waking in peer-reviewed trials.Sleep quality
05ApigeninA natural flavonoid found in chamomile. Binds to GABA-A receptors to produce a calming effect — without the dependence risk of pharmaceutical alternatives.Relaxation
What people are saying
Finally, something that works for people like us.
Some reviewers received complimentary product. Individual results may vary.
★★★★★
"I've tried every sleep supplement on the market. This is the first one that actually addressed why I was waking up — I was just too hot. Three weeks in and I'm sleeping through the night."
Sarah M. · Verified review
★★★★★
"I'm in perimenopause and night sweats were destroying my sleep. My doctor told me to avoid melatonin. Cooldown Nightcap was exactly what I needed — and it actually tastes good."
Joanne P. · Verified review
★★★★★
"I was about to spend $2,500 on a cooling mattress topper. Tried this first. Genuinely surprised. I'm falling asleep faster and not waking up drenched anymore. Saved myself a lot of money."
Derek M. · Verified review
Get started
Your first cool night starts here.
30 sachets. One a night. Give it two weeks — most customers notice a difference within the first five nights.
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