01 / Amino acid
Free-form glycine
3,000 mg
Working amount of free-form glycine
Glycine included as its own ingredient, separately from the magnesium bisglycinate.
Dayspan / Your evening ritual
Dayspan Nightspan.
Nightspan Formula · Glycine + magnesium bisglycinate
An evening formula with glycine, magnesium and three supporting actives.
Choose your routine ↓An evening ritual built around glycine.
In development · not yet for sale
Choose your routine.
Prelaunch preview1 jar · subscription
- 1 jar · Nightspan
$55 / 30 days
Planned package total · $55 per jar
Planned renewal: $55 every 30 days until canceled.
$34 less than the same quantity at the planned one-time price.
Free US shipping is planned for this subscription.
Subscription details
Pause, skip and cancellation details will be available before enrollment opens.
Preview only. No payment, reservation or subscription is created.
Explore the full Nightspan offer →
Your evening, your pace
Close the day.
Open a book.
A quieter corner. A few more pages. Meet the melatonin-free formula we’re developing for an evening routine.
Make room for both →Product specification
The formula, in full view.
Product information updated . Final formula approval remains pending.
Working formula, not a final Supplement Facts panel. Glycine’s normal biological roles are not proof that this product improves all those functions. Sleep is one part of the ingredient story, not a separate product.
| Active / candidate | Working amount | Form / open question |
|---|---|---|
| Glycine | 3,000 mgPending approval | free-form |
| Magnesium | 250 mg elementalPending approval | fully-reacted bisglycinate, printed as elemental |
| L-theanine | 200 mgPending approval | free-form |
| Saffron extract | 28 mgPending approval | affron®-type, ≥3.5% Lepticrosalides · planned source |
| Zinc | 15 mg elementalPending approval | bisglycinate, printed as elemental |
Nightspan / The two ingredients, explained
Yes, there’s both.
Free-form glycine and magnesium bisglycinate.
Two separately specified ingredients in one formula.
02 / Mineral
Magnesium bisglycinate
250 mg elemental
Working amount of magnesium itself
Bisglycinate names the magnesium form. The listed amount measures elemental magnesium.
Both belong in Nightspan.The free-form glycine amount is separate from the elemental magnesium amount.
Alongside
- L-theanine200 mg
- Saffron extract28 mg
- Zinc15 mg elemental
What does “elemental” mean?
It means the amount of magnesium itself, rather than the weight of the whole magnesium-containing compound. The two headline amounts above measure different ingredients; they are not a total-glycine calculation.
Read the NIH explanation of magnesium labeling ↗Working formula · final approval pending. This graphic explains composition, not directions for use or proven benefits of the finished combination. Symbols are ingredient identifiers, not molecular structures.
Read the detailed formula comparison
Two entries, one formula
Why include glycine and magnesium bisglycinate together?
Free-form glycine supplies the amino acid directly; magnesium bisglycinate supplies magnesium in a glycine-bound form. The 3,000 mg figure describes free-form glycine, while 250 mg elemental describes magnesium. Both are included in Dayspan Nightspan.
| Question | Free-form glycine | Magnesium bisglycinate |
|---|---|---|
| What does the entry specify? | Glycine as its own active | Magnesium supplied in a chelated form |
| What does the amount count? | 3,000 mg free-form glycine | 250 mg elemental magnesium, not total compound weight |
| Are they alternatives in Dayspan? | No. Both are in the same formula. | No. Both are in the same formula. |
Including both is a formulation choice, not evidence that the combination works better than either ingredient alone. Do not add the elemental magnesium amount to the free-form glycine amount. Total glycine from all chelates remains unverified until final supplier composition is available.
Get to know the ingredients
A closer look at each choice.
Select an ingredient for its form, working amount and place in the blend.
Glycine3,000 mg
- What it is
- free-form
- Why it’s included
- The amino-acid foundation of our evening formula. Glycine also has normal roles in collagen, glutathione and creatine synthesis; those roles are not measured benefits of this finished product.
Magnesium250 mg elemental
- What it is
- fully-reacted bisglycinate, printed as elemental
- Why it’s included
- A mineral component alongside glycine, supplied as fully-reacted bisglycinate. The amount is disclosed as elemental magnesium, not the weight of the whole compound.
L-theanine200 mg
- What it is
- free-form
- Why it’s included
- A complementary amino acid in the evening formula, selected with research on self-reported sleep quality in mind.
Saffron extract28 mg
- What it is
- affron®-type, ≥3.5% Lepticrosalides · planned source
- Why it’s included
- The botanical component of the evening formula. Research on standardized saffron extracts informs this selection; the final extract must be verified against the cited material.
Zinc15 mg elemental
- What it is
- bisglycinate, printed as elemental
- Why it’s included
- A supporting mineral, disclosed as elemental zinc. Its inclusion does not mean a food-based zinc study has tested this bisglycinate formula.
Working specifications, subject to approval. Ingredient research is not a clinical trial of the finished Dayspan formula.
Format & preparation
Powder / drink-mix development format. Final flavor, scoop weight, mixing, timing and storage instructions are not yet available.
Serving & supply
Final serving count and directions must come from the approved label. A container count does not establish a duration of use.
Suitability & testing
Review the complete ingredients, warnings and first-batch identity, potency and contaminant report before purchase.
Ingredient research
The source is part of the specification.
These sources concern individual ingredients, not a clinical trial of Dayspan. Match the studied material, amount, population and outcome before interpreting a finding. Inclusion here is not a finished-product benefit claim.
| Ingredient and source | What was studied | Main finding | Limits and funding |
|---|---|---|---|
| Small bedtime studies of 3 g free-form glycine in people dissatisfied with their sleep, including sleep-laboratory measurements. | Small studies reported improved subjective sleep-related measures; the 2007 sleep-lab study also reported shorter sleep latency. Sleep architecture was unchanged. | The trials are small, and both were authored by researchers affiliated with Ajinomoto, an amino-acid manufacturer. The study found sleep architecture unchanged — glycine got people to deep sleep faster, it did not create more of it. We will never claim otherwise. Study findings do not establish an outcome from this finished Dayspan combination. | |
| A 2025 randomized trial of 250 mg elemental magnesium as bisglycinate in 155 adults with poor sleep, assessing insomnia severity and secondary sleep and daytime measures. | Insomnia-severity scores improved vs placebo — a small effect | The effect was small (about 1.6 points on the scale) and every secondary measure — sleep quality, daytime sleepiness, fatigue, stress, mood — showed no difference from placebo. It was academically funded, which is rarer than it should be. No claim of superior absorption. Study findings do not establish an outcome from this finished Dayspan combination. | |
| A 2025 review of 18 randomized trials involving 897 participants, examining self-rated sleep quality and objective sleep measurements. The review is not a trial of Dayspan’s combination. | Self-rated sleep quality improved across 18 trials; objective recordings did not move | Subjective only. Objective sleep recordings did not move, and the sleep-onset effect was trivially small. We claim the calm, not the architecture. 200 mg is the floor of the effective range. Study findings do not establish an outcome from this finished Dayspan combination. | |
Saffron extractLopresti et al. 2021 (Sleep Medicine), N=120 ↗ | A 28-day placebo-controlled trial of 120 adults with poor sleep, including a 28 mg standardized saffron extract taken before bed. Sleep was assessed using questionnaires and diaries. | Self-rated sleep quality and insomnia-severity scores improved; questionnaire endpoints only | Both trials were funded by the extract's manufacturer and measured sleep by questionnaire, not in a sleep lab. The named-trial citation holds only if the branded extract is what we buy. Better self-rated sleep, not deep-sleep architecture. Study findings do not establish an outcome from this finished Dayspan combination. |
| A 12-week study in 120 healthy adults using 15 mg zinc daily from zinc-rich food, with actigraphy measurements of sleep efficiency and time to fall asleep. | Sleep efficiency and time to fall asleep improved on actigraphy in healthy adults | The better trial gave the zinc inside a food, not alone, and was industry-authored; a second placebo-controlled trial used a sleep questionnaire. Zinc earns a supporting slot and modest copy, not a headline. Do not exceed 15 mg without a clinician. Study findings do not establish an outcome from this finished Dayspan combination. |
Start with the human research
Sleep research gives glycine a place in the evening.
Human research on sleep
Small human supplementation studies
In a small study of people reporting unsatisfactory sleep, 3 g of glycine before bed improved self-rated sleep quality and shortened the time to fall asleep. Sleep is a useful part of the glycine story, not the whole of it.
The study included researchers affiliated with Ajinomoto. Sleep architecture was unchanged; it did not demonstrate more deep sleep. It tested glycine, not the five-active Dayspan formula.
Yamadera et al., Sleep and Biological Rhythms (2007) ↗Why glycine matters beyond bedtime.
Your body also uses glycine in collagen, glutathione, and creatine synthesis. Explore those biological roles below. They explain the amino acid’s importance, not additional benefits demonstrated for this formula.
A building block of collagen
Established biological role
Glycine occupies every third position in the repeating sequence of fibrillar collagen. Its small size helps the strands fit together. That makes glycine part of the molecular structure of connective tissue—not just an ingredient discussed at bedtime.
This structural role does not establish that a glycine supplement rebuilds joints, firms skin, or replaces a collagen product.
Long et al., Biochemistry (1993) · collagen peptide structure ↗One of glutathione’s three components
Established biological role
Glutathione is an antioxidant made from glycine, cysteine, and glutamate. Glycine is therefore one of the ingredients your cells use to make this part of their antioxidant defenses.
Being a precursor does not prove that this formula raises glutathione levels or produces a measurable antioxidant benefit. It is not a detox claim.
National Cancer Institute · glutathione definition ↗An input for creatine synthesis
Established biological role
The body makes creatine using glycine, arginine, and methionine. Creatine helps tissues store and use energy. Glycine participates upstream in that process; it is not itself a stimulant.
This does not make glycine equivalent to a creatine supplement or demonstrate improved strength, exercise recovery, or all-day energy from this product.
MedlinePlus Genetics · GATM normal function ↗Ingredient choices · Dayspan Nightspan
What we left out of Dayspan Nightspan.
Glycine leads this five-active formula. The ingredients we leave out help keep that identity clear.
Melatonin
Melatonin is not part of this glycine-led formula. Glycine’s wider story is not being combined with a melatonin product.
Stevia and monk fruit
The unflavoured formula relies on glycine’s own sweetness, without added stevia or monk fruit.
N-acetylcysteine (NAC)
This is not a GlyNAC formula. NAC is not included, so research on the glycine-plus-NAC combination does not describe this product.
Added GABA
GABA is not an added active in this five-active formula. This formula pairs glycine with magnesium, L-theanine, saffron and zinc.
These choices are specific to this formula. An omission alone does not establish greater safety or effectiveness.
STRAIGHT ANSWERS
Product questions.
Does Dayspan contain both glycine and magnesium bisglycinate?
Yes. The working formula specifies 3,000 mg free-form glycine alongside 250 mg elemental magnesium as bisglycinate. They are two entries in the same product, not alternative formulas.
Is Dayspan Nightspan a single-ingredient powder?
No. It combines glycine, magnesium, L-theanine, saffron extract and zinc. The complete label and final material specifications remain pending.
Does the magnesium amount also count as glycine?
No. Elemental magnesium describes the magnesium content, not glycine content or total chelate mass. Do not add that number to the free-form glycine amount. Total glycine contributed by all chelates has not been established from verified final material data.
Does Dayspan Nightspan contain melatonin?
Melatonin is not an ingredient in the current working formula. The five specified actives are glycine, magnesium, L-theanine, saffron extract and zinc; the complete final label will publish before sale.
Has the finished five-active formula been clinically tested?
No. The references concern individual ingredients or specific study formulations, not the finished Dayspan combination. Including the ingredients together does not establish an added or synergistic benefit.
How many servings are in a jar, and when should I take it?
Final serving count, scoop size and directions are pending. The planned 30-day replenishment interval is not a serving instruction and does not establish how long a jar will last.
Who should review suitability before use?
Review the final label with your existing supplements and medicines. Children, pregnancy, breastfeeding, medical conditions and medication use require appropriate qualified guidance. This page does not provide an individual supplement plan.
Is this the final label?
No. These are development details, not instructions for use. The complete label, serving count, preparation directions, warnings and first-batch report must be available before sale.
Is Nightspan only a sleep product?
No. Glycine is a building block in collagen and a participant in glutathione and creatine synthesis. Those normal roles explain why it interests us beyond sleep; they do not prove skin, metabolic, antioxidant or training outcomes from the finished Dayspan formula. Its complete label will determine directions for use.
A routine worth making room for
Choose it once. Plan to keep it in your routine.
A familiar moment at the end of your day, with five disclosed actives in one powder. Review the complete formula alongside your existing supplements, then choose how you would like to arrange supply when orders open. Final preparation and serving directions will come with the approved label.
01
A reason to return
The planned subscriber price is $34 less per delivery than the same quantity purchased once. A saving on replenishment, not a different formula.
02
One less reorder
Scheduled deliveries make replenishment part of the plan. Choose a cadence that fits the final serving directions and your actual use—not a promise that more product means better results.
03
A choice you can review
One-time purchasing remains available as an option. Renewal charges and customer controls will be clear before subscription enrollment; this preview makes no commitment for you.
STRAIGHT ANSWERS
Plans and subscriptions.
Why choose a subscription?
A subscription is a replenishment choice: scheduled deliveries rather than a new order each time. Where a subscriber price is shown, compare it with the same quantity at the one-time price. Subscribing does not change the formula or promise better results.
Does selecting a subscription charge me?
No. This is a prelaunch plan preview, not enrollment. Selecting a plan here does not place an order or authorize recurring payments. You will have to review and explicitly accept the recurring terms when subscription checkout opens.
Can I pause, skip or cancel?
Those controls, their deadlines and the cancellation process must be published and tested before subscriptions open. We are not accepting recurring payments while those details are unavailable.
Can I subscribe to a stock-up pack or a routine bundle?
Choose one container or a three-container stock-up of this formula. Collagen Essentials and Nightspan also have a two-product routine option. New bundle subscription prices and delivery intervals will be published before enrollment; three jars do not imply 90 days of supply.
Can I buy it just once?
Yes, one-time purchasing is shown alongside the subscription option. It has no automatic renewal. Both choices remain unavailable until the product and purchase terms are approved.
Is every 30 days the same as a calendar month?
No. A 30-day renewal interval is exactly 30 days; it is not monthly calendar billing. Delivery cadence also does not establish how long a jar will last. Serving counts and directions must match the final label.
Your Dayspan routine
An evening ritual built around glycine.
You’ve seen the ingredients, the evidence and what this formula leaves out. Choose how you would like to buy it: a recurring delivery or a one-time purchase.
All plan choices here are previews. We’ll publish the final label, serving count, shipping, returns and subscription terms before orders open.
Read the full Nightspan offer →Make it part of your routine.
Prelaunch preview1 jar · subscription
- 1 jar · Nightspan
$55 / 30 days
Planned package total · $55 per jar
Planned renewal: $55 every 30 days until canceled.
$34 less than the same quantity at the planned one-time price.
Free US shipping is planned for this subscription.
Subscription details
Pause, skip and cancellation details will be available before enrollment opens.
Preview only. No payment, reservation or subscription is created.
Explore the full Nightspan offer →