SiS Rest+ Juice
Training. Nutrition. Sleep. Most endurance athletes have the first two dialed, but sleep is where the actual adaptation happens, and it's the one lever that gets the least targeted attention. Poor sleep doesn't just leave you tired. It blunts training adaptation, compromises decision-making, weakens immune function, and compounds across a training block in ways that no amount of extra mileage can offset. The pros know this. It's why sleep protocols are now standard practice at the professional level.
SiS Rest+ Juice is a clinically studied pre-bedtime juice sachet built specifically for athletes — combining tart cherry, glycine, tryptophan, 5-HTP, theanine, and magnesium in a single 55ml serving to help you fall asleep faster, sleep longer, and wake up actually recovered.
Six Ingredients for Better Nights – Each ingredient in Rest+ Juice targets a different mechanism in the sleep and recovery process. Tart cherry and cacao extract bring natural anti-inflammatory and relaxation compounds. Glycine — an amino acid that lowers your core body temperature to signal sleep onset — is paired with L-theanine, the calming compound found in green tea that quiets mental noise. Tryptophan and 5-HTP are the building blocks your brain converts into serotonin and melatonin, the hormones that regulate your sleep cycle. Magnesium rounds out the formula, supporting muscle relaxation and the nervous system wind-down that heavy training constantly depletes.
Proven To Improve Sleep – Rest+ Juice is backed by an internal clinical study. Consuming it prior to sleep was found to reduce the time it takes to fall asleep by 24 minutes, increase total sleep time by 22 minutes, and improve sleep efficiency by 2.4% compared to a placebo. For athletes stacking hard training days, those 22 minutes of extra sleep matter.
Versatile by Design – The 55ml sachet mixes into cold water, warm water as a pre-bed tea, a smoothie, or straight into a post-workout recovery shake. It's one of the few sleep supplements that works as both a standalone bedtime drink and a recovery shake add-in — which makes it easy to build into an existing routine.
How to Use SiS Rest+ Juice
Timing: Consume one 55ml sachet 30–60 minutes before bed. This gives the active ingredients time to begin working through your system before sleep onset.
How to Take It: Add to 200ml of cold water for a pre-bed drink, or mix with hot water to make a calming tea. Also works blended into a recovery shake, smoothie, or yogurt for a combined protein + sleep protocol.
Frequency: Daily use during heavy training blocks, training camps, or race week delivers the most consistent benefit. It's especially useful when late evening training sessions make winding down difficult.
Product Information
Product Information
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Description
Training. Nutrition. Sleep. Most endurance athletes have the first two dialed, but sleep is where the actual adaptation happens, and it's the one lever that gets the least targeted attention. Poor sleep doesn't just leave you tired. It blunts training adaptation, compromises decision-making, weakens immune function, and compounds across a training block in ways that no amount of extra mileage can offset. The pros know this. It's why sleep protocols are now standard practice at the professional level.
SiS Rest+ Juice is a clinically studied pre-bedtime juice sachet built specifically for athletes — combining tart cherry, glycine, tryptophan, 5-HTP, theanine, and magnesium in a single 55ml serving to help you fall asleep faster, sleep longer, and wake up actually recovered.
Six Ingredients for Better Nights – Each ingredient in Rest+ Juice targets a different mechanism in the sleep and recovery process. Tart cherry and cacao extract bring natural anti-inflammatory and relaxation compounds. Glycine — an amino acid that lowers your core body temperature to signal sleep onset — is paired with L-theanine, the calming compound found in green tea that quiets mental noise. Tryptophan and 5-HTP are the building blocks your brain converts into serotonin and melatonin, the hormones that regulate your sleep cycle. Magnesium rounds out the formula, supporting muscle relaxation and the nervous system wind-down that heavy training constantly depletes.
Proven To Improve Sleep – Rest+ Juice is backed by an internal clinical study. Consuming it prior to sleep was found to reduce the time it takes to fall asleep by 24 minutes, increase total sleep time by 22 minutes, and improve sleep efficiency by 2.4% compared to a placebo. For athletes stacking hard training days, those 22 minutes of extra sleep matter.
Versatile by Design – The 55ml sachet mixes into cold water, warm water as a pre-bed tea, a smoothie, or straight into a post-workout recovery shake. It's one of the few sleep supplements that works as both a standalone bedtime drink and a recovery shake add-in — which makes it easy to build into an existing routine.
How to Use SiS Rest+ Juice
Timing: Consume one 55ml sachet 30–60 minutes before bed. This gives the active ingredients time to begin working through your system before sleep onset.
How to Take It: Add to 200ml of cold water for a pre-bed drink, or mix with hot water to make a calming tea. Also works blended into a recovery shake, smoothie, or yogurt for a combined protein + sleep protocol.
Frequency: Daily use during heavy training blocks, training camps, or race week delivers the most consistent benefit. It's especially useful when late evening training sessions make winding down difficult.
