Extra Priority when packing & 100% coverage

Extra Priority when packing & 100% coverage

Rich Cacao
No Melatonin* Clinically Dosed*

A nightly hot cacao with clinically-studied ingredients to help you fall asleep, stay asleep, and wake up clear. No melatonin. No proprietary blends. No shortcuts.*

  • Calmer mind within 30 minutes
  • Sleep through the night without 3am wake-ups
  • Wake up rested, not foggy

Our formula is the exact stack Dr. Huberman publicly recommends.

Dr. Andrew Huberman Stanford Medicine
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Rated 4.8/5
Cancel anytime
★★★★★

Three weeks in and I haven't touched my melatonin gummies once. I sleep through the night and wake up actually clear-headed.

Sarah K. Verified Buyer
★★★★★

The taste alone makes it easy. But honestly, I sleep deeper and wake up clearer. My new favorite part of the day.

Lisa M. Verified Buyer
★★★★★

First sleep aid that actually keeps me asleep through the night. I'd given up trying. SF Zero has been on my nightstand for two months.

Rachel T. Verified Buyer
30-night money-back guarantee. Less than 1% of customers ever use it.
Pay attention

Long-term melatonin use is linked to a 90% higher risk of heart failure.

— American Heart Association, 2025

New research raises
serious questions.

The research keeps coming in and it suggests melatonin isn't what most people think it is. Three findings from JAMA, Harvard, and the American Heart Association are changing how doctors look at the bottle on your nightstand. And why you should stop using it before it's too late.

No Melatonin x SF Zero 1
THE DOSE

It's a hormone. Not a vitamin.

Your brain releases about 0.3mg of melatonin a night. That's all it needs. The gummies on the shelves contain up to 10 times that dose. You're not helping your sleep. You're flooding your body with a hormone it never asked for in the first place.

0x

the dose your body actually needs

Source: Harvard Medical School
No Melatonin x SF Zero 2
THE LABEL

The label isn't the truth.

A 2023 JAMA study tested melatonin gummies sold across the US. Almost none of them contained what the label claimed, some had nearly 4 times more. You've been taking blind doses of a hormone for years, and didn't know it.

0%

of US gummies are mislabeled

Source: JAMA, 2023
No Melatonin x SF Zero 3
LONG-TERM USE

Short-term help. Long-term harm.

In 2025, the American Heart Association tracked 130,828 long-term melatonin users. They had nearly double the mortality rate and 90% higher risk of heart failure. The damage isn't theoretical, it's measurable, and it's stacking up.

+ 0%

higher heart-failure risk

Source: American Heart Association, 2025
No Melatonin x SF Zero 1
THE DOSE

It's a hormone. Not a vitamin.

Your brain releases about 0.3mg of melatonin a night. That's all it needs. The gummies on the shelves contain up to 10 times that dose. You're not helping your sleep. You're flooding your body with a hormone it never asked for in the first place.

0x

the dose your body actually needs

Source: Harvard Medical School
No Melatonin x SF Zero 2
THE LABEL

The label isn't the truth.

A 2023 JAMA study tested melatonin gummies sold across the US. Almost none of them contained what the label claimed, some had nearly 4 times more. You've been taking blind doses of a hormone for years, and didn't know it.

0%

of US gummies are mislabeled

Source: JAMA, 2023
No Melatonin x SF Zero 3
LONG-TERM USE

Short-term help. Long-term harm.

In 2025, the American Heart Association tracked 130,828 long-term melatonin users. They had nearly double the mortality rate and 90% higher risk of heart failure. The damage isn't theoretical, it's measurable, and it's stacking up.

+ 0%

higher heart-failure risk

Source: American Heart Association, 2025
Learn more about the research

So we built the first sleep aid without added hormones.

Built on peer-reviewed research, not marketing claims. A formula that works with your body's sleep, instead of forcing it.

With clinically-studied ingredients. Zero compromises.

Every ingredient in SF Zero earned its place in the formula. Chosen for what the research actually shows, dosed at the level real sleep studies use, and sourced from the regions where each one grows best.

Below are the key ingredients that do the actual work, and one we deliberately left out.

Magnesium glycinate

200mg

USA

L-theanine

200mg

Japan

Apigenin

50mg

Egypt

Ashwagandha KSM-66

300mg

India

Natural cacao powder

4g

Peru

Melatonin

0mg

By design

Every dose is third-party tested.

See all 10 ingredient sources →

Magnesium glycinate

Magnesium calms your nervous system and helps your muscles relax before bed. The problem with most magnesium supplements is that your body barely absorbs them, and they upset your stomach. Glycinate is the gentle, well-absorbed form. The one used in real sleep studies.

Why this dose

200mg is the level researchers use in clinical sleep trials. Enough to feel the calm, not so much that you wake up groggy.

L-theanine

L-theanine is a natural compound found in green tea. It creates the kind of calm you feel after a deep breath. Quiet mind, no drowsiness, no hangover. It's why people feel relaxed after green tea but not sleepy like with coffee.

Why this dose

200mg is the amount used in studies that measured how fast people fall asleep. Less than that, and you don't feel a thing.

Apigenin

Apigenin is the active part of chamomile. What makes chamomile tea relaxing. The catch: a normal cup barely contains any. We use the concentrated version. 50mg here equals what you'd get from 20+ cups of tea, without the bathroom trips.

Why this dose

50mg is the exact amount Andrew Huberman recommends in his nightly sleep stack.

Ashwagandha KSM-66

You know that moment when you snap awake at 3am with your heart racing? That's a stress hormone called cortisol spiking in the middle of the night. Ashwagandha lowers it. KSM-66 is the version with the most science behind it, over 40 human studies.

Why this dose

300mg is the standard amount used in studies that showed lower cortisol over 8 weeks.

Natural cacao powder

Real cacao, not the Dutch-processed kind. Most brands use alkalized cacao because it's smoother and cheaper. The problem: that processing destroys most of what makes cacao actually good for you. Ours stays raw, so the chocolate flavor is real and the cacao is doing real work.

Why it's here

Cacao is the heart of the ritual. It's also a natural source of magnesium and tryptophan. Small amounts, but real.

Melatonin

Melatonin is a hormone, not a vitamin and not a supplement. Your brain already makes it. Most sleep aids add 10 to 30 times more than your body produces naturally. New research links long-term use to a 90% higher risk of heart failure. So we left it out.

Why not

Your body already makes it. We don't need to add more.

1 OF 6
What to expect from your first 30 nights.

Real change you can feel in as little as 7 nights.

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  • Night 01

    Calm, almost immediately

    • Calmer within 30 minutes

    • Less tense before bed

    • Easier to fall asleep

  • Week 01

    Falling asleep gets easier

    • Less lying awake at night

    • Less tossing and turning

    • Bedtime starts to feel good

  • Week 02

    The 3am wake-ups fade

    • Sleep through the night

    • No more anxious wake-ups

    • Mornings feel lighter

  • Month 01

    Sleeping gets easy again

    • Wake up rested, not foggy

    • More energy through the day

    • Sleep stops being a struggle

How to use:

One scoop, 30 minutes before bed, every night.

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See how SF Zero stacks up.

Most sleep aids rely on hormones, hidden doses, or proprietary blends. We don't. Every ingredient in SF Zero is studied, dosed at the level the research uses, and printed in full on the label.

Compare:

SF Zero

Melatonin gummy

Sleep supplements

Other sleep drinks

Safe to take every night
Yes
Linked to heart risk
Often adds melatonin
Often adds melatonin
Proven to actually help you sleep
Yes
4 minutes faster
Only if doses match
Hidden doses
Exactly what's on the label
Every mg
88% mislabeled
Per bottle
Proprietary blend
Something to look forward to
Delicious cacao drink
Sugars + hormones
3 bottles, 5 pills
Tastes like grass
What you pay for one good night
$1.55
$0.35 (for 4 min)
$6.17
$1.90

Every claim above comes from peer-reviewed research, not our marketing team. Tap any ⓘ to see the source.

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OUR PROMISE

30-night sleep guarantee.

Try SF Zero for 30 nights. If you don't feel the difference, you'll get your money back.

Third-party tested
Cancel any time
Clinical doses, full transparency

A ritual you'll actually look forward to.

No pills to swallow. No timing to remember. Just one warm cup, every night.

SF-Zero-Ritual-1
1

Mix one scoop

Add one scoop to eight ounces of warm milk. Oat, almond or dairy, Whatever you like.

SF-Zero-Ritual-2
2

Stir until smooth

Whisk, froth or stir for about 30 seconds. The cacao melts in. It starts to smell like dessert.

SF-Zero-Ritual-3
3

Sip before bed

Drink it about 30 minutes before bedtime. Take your time and enjoy it, that's the whole point.

SF-Zero-Ritual-4
4

Wake up clear

No grogginess. No melatonin hangover. Just the kind of morning that comes after real sleep.

SF-Zero-Ritual-1
1

Mix one scoop

Add one scoop to eight ounces of warm milk. Oat, almond or dairy, Whatever you like.

SF-Zero-Ritual-2
2

Stir until smooth

Whisk, froth or stir for about 30 seconds. The cacao melts in. It starts to smell like dessert.

SF-Zero-Ritual-3
3

Sip before bed

Drink it about 30 minutes before bedtime. Take your time and enjoy it, that's the whole point.

SF-Zero-Ritual-4
4

Wake up clear

No grogginess. No melatonin hangover. Just the kind of morning that comes after real sleep.

Why 30 minutes?

That's when magnesium and L-theanine peak in your system.

Questions? We've got answers.

Everything you need to know before your first sip.

Pick a topic:

Why no melatonin?

Melatonin is a hormone your brain already makes. Supplementing it long-term has been linked to a 90% higher risk of heart failure (American Heart Association, 2025), and the AASM advises against it for chronic use. SF Zero gives your body what it needs to wind down, without the hormone.

What's actually in SF Zero?

Four key ingredients, each at the dose used in real sleep trials: magnesium glycinate (200mg), L-theanine (200mg), apigenin (50mg), ashwagandha KSM-66 (300mg), and zero melatonin by design. Plus a base of organic cacao, coconut milk powder, monk fruit, sea salt and vanilla. Nothing hidden, no proprietary blends.

See the full ingredient breakdown →

Are the doses clinically studied?

Yes. Each of the active ingredients is dosed at the level used in peer-reviewed human sleep trials. Not "clinically inspired" or rounded down to save costs. Every milligram is printed on the bag.

Is it third-party tested?

Every batch. We send each production run to an independent lab to verify potency, purity and screen for heavy metals, microbial contamination and pesticides. Want the Certificate of Analysis for your specific batch? Email support@sf-zero.com with your batch number and we'll send it within 24 hours.

What does it taste like?

Rich, dark cacao. The kind you'd actually want before bed. Lightly sweet from monk fruit (no sugar, no artificial sweeteners), with a hint of vanilla and sea salt. Most customers compare it to a really good hot chocolate, just one without the sugar crash.

Is it vegan, gluten-free, dairy-free?

Yes to all three. SF Zero is 100% vegan, gluten-free, and dairy-free. The coconut milk powder gives it the creamy texture without using dairy. Free from soy, maltodextrin, artificial colors, and artificial sweeteners.

When should I drink it?

About 30–45 minutes before bed. That gives the magnesium and L-theanine time to reach your bloodstream and start their relaxing work right around the moment you want to fall asleep.

How do I prepare it?

One scoop, 8oz of liquid, stir or froth until smooth. Takes about 30 seconds. Hot or cold, both work. Try it as a warm cacao with oat milk before bed, or blend it cold with ice for a chocolate smoothie on summer nights. Most customers go warm in winter, cold in summer. Use whatever milk you like: oat, almond, dairy, or just water.

How fast will I feel it working?

Most people feel calmer and more relaxed the first night. Deeper, more restorative sleep typically builds over 1–2 weeks as the magnesium and reishi reach steady levels in your system. Give it 30 nights before you judge, that's why our guarantee is 30 nights long.

Will I wake up groggy?

No. That groggy, hung-over feeling people associate with sleep aids comes from melatonin and sedating ingredients, neither of which we use. SF Zero works with your body's natural sleep rhythm, so you wake up clear-headed, not knocked out.

Is it safe to drink every night?

Yes. SF Zero is designed for nightly use. None of the ingredients are habit-forming or hormone-disrupting. Unlike melatonin, which the AASM recommends against using long-term. You can drink it every night without building tolerance or dependence.

How do I switch from melatonin?

Most people stop melatonin cold turkey when they start SF Zero and don't look back. If you've been on a high dose (5mg+) for a long time, you might have one or two restless nights as your body recalibrates. Your brain knows how to do this, melatonin just got in the way.

Can I use it with other supplements or medications I take?

Most likely you don't need to. SF Zero already gives you clinical doses of magnesium glycinate (200mg), L-theanine (200mg), ashwagandha KSM-66 (300mg), apigenin (50mg) and reishi (500mg). If you're already taking these as separate pills, you can stop! that's the whole point of SF Zero. One scoop replaces the chalky stack on your nightstand.

For other supplements not in our formula (vitamin D, B-complex, etc.), generally fine to combine. For prescription medications, especially blood thinners or other sleep medications, please consult your doctor first.

Is it safe during pregnancy or breastfeeding?

We don't recommend SF Zero during pregnancy or breastfeeding without first consulting your doctor. The individual ingredients are generally considered safe, but every pregnancy is different, your OB/GYN knows your situation best.

What if it doesn't work for me?

We offer a 30-night money-back guarantee. Try SF Zero for 30 nights if you're not sleeping better, email support@sf-zero.com and we'll refund you in full. Keep the bag. No questions, no return shipping, no hoops.

How fast is shipping?

Free shipping on all US orders over $70. Orders typically ship within 1–2 business days and arrive in 3–5 business days, depending on your location.

Can I change my address after ordering?

Yes, as long as your order hasn't shipped yet. Email support@sf-zero.com with your order number and the new address as soon as possible, and we'll update it before it leaves the warehouse.

How does the subscription work?

Subscribe and save 25%. Your bag arrives every 30 days, automatically. You can skip a delivery, change the frequency (every 30 or 60 days), or cancel any time with one click in your account. No phone calls, no email chains, no commitment.