The full formula. Every ingredient, every milligram.

Every active ingredient in SF Zero is backed by peer-reviewed research, dosed at the level the studies actually used, and listed here to the milligram. No proprietary blends. No rounded-down amounts. No "trace" ingredients that look good on a label and do nothing in your body

Each batch is third-party tested for potency and purity, so the dose you read is the dose you drink. Below you'll find every active ingredient, every supporting ingredient, and the ingredients 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

Coconut milk powder

1g

Philippines

Vanilla bean powder

150mg

Mexico

Monk fruit extract

50mg

China

Himalayan rock salt

50mg

Pakistan

Sunflower lecithin

100mg

Europe

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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.

Coconut milk powder

Pure coconut milk, dried into a powder. No maltodextrin, no fillers, no sugar. It's what gives the drink its creamy texture without using dairy. Just enough to make it feel like real hot chocolate, not enough to taste like coconut.

Why it's here

Without it, the drink is thin. The fats also help your body absorb apigenin, which is fat-soluble.

Vanilla bean powder

Vanilla isn't just flavor, it's what every chocolatier adds to round out cacao. Without it, chocolate tastes flat. We use Mexican vanilla beans, which have a deeper, woodier flavor than the Madagascar kind most brands use. The original vanilla, paired with the original cacao.

Why it's here

Cacao alone is bitter and sharp. Mexican vanilla makes it taste like real hot chocolate.

Monk fruit extract

A small green melon from southern China that's about 200x sweeter than sugar. No calories, no glucose spike, no aftertaste. Used in tiny amounts because that's all you need.

Why it's here

We tested erythritol and stevia. Both leave a cooling aftertaste people don't like in a warm drink. Monk fruit alone gets it right.

Himalayan rock salt

A pinch of unrefined salt mined from ancient seabeds. The same salt every chocolatier adds to dark chocolate, for the same reason: it makes the cacao taste more like cacao.

Why it's here

Without salt, the drink tastes flat. With salt, the chocolate notes come forward.

Sunflower lecithin

A natural emulsifier from sunflower seeds. It's what keeps the cacao from clumping or sinking to the bottom of your cup. Most brands hide their emulsifier under "natural flavors" or use maltodextrin instead. We use sunflower lecithin and we tell you it's there.

Why it's here

Without it, you'd be stirring a clumpy drink for five minutes. With it, everything dissolves smoothly.

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What we left out. Nine ingredients you should walk away from.

Every ingredient below is standard in sleep products on the shelf right now. They shouldn't be. Some are hormones pretending to be supplements. Some are added to make the label look full. Some don't even reach your bloodstream, they sit in your stomach looking impressive on paper.

If you see one of these on a label, you're not looking at a sleep formula. You're looking at marketing.

Melatonin

0mg

By design

L-tryptophan

0mg

By design

GABA

0mg

By design

Reishi

0mg

By design

Zinc

0mg

By design

Magnesium oxide

0mg

By design

Erythritol

0mg

By design

Maltodextrin

0mg

By design

"Natural flavors"

0mg

By design

Ten ingredients in. Nine ingredients out. Both decisions matter

A formula isn't just what you add. It's what you refuse to add when everyone else does. Every ingredient in this drink earned its place at the dose the research used. Every ingredient we left out was rejected for a reason we can defend

No hormones overriding your sleep system. No fillers padding the label. No mystery ingredients behind vague terms. Just the formula that actually works and nothing that doesn't

The research behind every dose, and the reasoning behind every choice not to include something, is open for anyone who wants to read it.

Read the full research →
Try SF Zero tonight →

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.

L-tryptophan

Tryptophan is what your body uses to make melatonin. Adding it as a supplement is just the back door into the same hormone system melatonin sits on. Most sleep brands add it because it sounds natural. It isn't.

Why not

We don't add melatonin. We don't add the thing your body turns into melatonin either.

GABA

GABA is the calming chemical your brain makes itself. Sounds great as a supplement until you learn that GABA you swallow can't actually reach your brain, it doesn't cross from your blood into your nervous system. So it sits there, doing nothing, looking good on a label.

Why not

Apigenin works on the same calming receptors and actually gets there. We use that instead.

Reishi

Reishi is everywhere in sleep products right now. The catch: almost all the research showing it helps sleep was done in mice. The few human studies are small, mixed, or test reishi alongside other mushrooms. Not enough to earn its place in a clinical formula.

Why not

Every other ingredient in this drink has real human sleep research behind it. Reishi doesn't.

Zinc

Zinc is essential for your immune system. In the morning, with food. In a sleep drink on an empty stomach, it tends to make people nauseous. It also competes with magnesium for absorption, so adding zinc means less magnesium reaches your body.

Why not

We chose magnesium that actually works over a zinc number that looks impressive on the label.

Magnesium oxide

Magnesium oxide is the cheapest form of magnesium and the worst absorbed. Your body uses only about 4% of what's in the capsule. Brands hide it inside "magnesium blends" so they can list "magnesium" on the label without paying for the form that actually works.

Why not

It barely absorbs. Why pay for an ingredient your body doesn't use.

Erythritol

Erythritol is a sugar alcohol used in almost every sleep cacao on the shelf. It's cheap, it adds bulk, and it tastes sweet without calories. The downside: a 2023 Cleveland Clinic study linked it to higher risk of heart attack and stroke. It also leaves a cooling aftertaste in warm drinks that people don't actually like.

Why not

We use monk fruit instead. No aftertaste, no health questions, just sweet.

Maltodextrin

A cheap powder made from corn or rice that brands add to fill out the scoop and make the drink feel thicker. It's not a sleep ingredient. It's a way to use less of the actual ingredients while keeping the bag the same size. It also raises blood sugar at the worst time, right before bed.

Why not

The drink should be thick because of cacao and coconut milk, not corn syrup powder.

"Natural flavors"

The phrase that lets brands add anything from a lab without telling you what's in it. "Natural" just means it started as a plant. It can still be processed with solvents, propylene glycol, or chemicals you'd never put in your kitchen.

Why not

It's not one ingredient. It's whatever the lab decided to put in.

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