Ingredients & Science: What Is in Biopeptide and Why
One studied active, named on the label and dosed to the research, plus two supporting ingredients, all explained in full, including where the evidence is still early. This page is the science behind Kincadence Biopeptide.
- The studied active: 150 mg of α-casozepine (αS1-casein hydrolysate) per capsule, the dose used in the 30-day stress study.
- Alongside it: 300 mg of magnesium glycinate (33 mg elemental magnesium) and 25 mg of apigenin per capsule.
- It works with GABA-A, your brain's own calming signal. Not a hormone, not a sedative, non-habit-forming.
- Four published studies: sleep onset by polysomnography, everyday stress, acute stress response, and the mechanism.
- Melatonin-free and gluten-free. Contains milk. Vegetable capsule with microcrystalline cellulose, magnesium stearate and silicon dioxide.
The whole formula, exactly as it is on the label
Supplement Facts
| Serving size | 1 capsule |
| Servings per container | 30 |
| αS1-casein hydrolysate (α-casozepine) milk protein hydrolysate | 150 mg |
| Magnesium glycinate elemental magnesium 33 mg (8% DV) | 300 mg |
| Apigenin | 25 mg |
Every ingredient and its dose is printed on the label. Nothing is hidden inside a blend. A bottle holds 30 capsules, a 30-day supply at one capsule a night.
What is α-casozepine?
α-casozepine is a ten-amino-acid peptide released from αS1-casein, the main protein in milk, by enzymatic digestion. It was characterized in 2001, when researchers asked a simple question: why does milk protein calm us? The answer was this peptide, which interacts with the GABA-A receptor, the brain's principal calming system.
GABA is the signal that tells your nervous system it is safe to stand down. Constant stress and stimulation keep overriding it, so the off switch never fully flips. α-casozepine supports that signal rather than adding a hormone or forcing sedation, which is why the effect is described as quiet rather than knocked out.
Biopeptide delivers 150 mg per capsule as a standardized milk protein hydrolysate. It is not a drug, not a hormone and not habit-forming. It contains milk.
How it works, in three steps
Take one capsule
30 to 60 minutes before bed, with or without food; two on harder nights.
α-casozepine gets to work
The milk peptide interacts with GABA-A receptors, your calming system, without sedating you.
Your mind stands down
You unwind, drift off, and wake without the melatonin fog.
The two supporting ingredients
The studies on this page tested α-casozepine on its own. No trial has tested this exact combination, and we do not claim one.
Magnesium glycinate
Magnesium is an essential mineral that supports normal muscle and nervous-system function. Glycinate is a gentle, chelated form. Each capsule gives 33 mg of elemental magnesium, about 8% of the daily value: a modest top-up, not the much larger doses used in magnesium sleep trials.
Apigenin
Apigenin is a flavonoid found in plants such as chamomile and parsley. It rounds out the evening formula. Human research on apigenin taken on its own is limited, so we make no claim for it beyond what it is.
Six decisions that make Biopeptide what it is
Not a hormone. A signal.
Melatonin tells your body clock what time it is. It does not calm the reason you are wired, and it can leave you foggy. α-casozepine works on the calming signal itself, so there is no nightly hormone and no next-day fog.
Not less stress hormone. A better brake.
A stress response at the right size is healthy; the problem is when everything gets the emergency size. GABA is the brake that sizes the response. Instead of trying to push a hormone down, α-casozepine supports the brake.
A nervous-system pattern, not a willpower problem.
Constant stress and stimulation keep overriding the signal that says it is safe to stand down. Exhaustion and restlessness then arrive together. Biopeptide is built for that pattern.
Different jobs.
Magnesium is a mineral your body uses for hundreds of processes; ashwagandha and valerian are herbs with broad effects. α-casozepine is one specific peptide with its own human studies on stress and sleep, acting on the calming signal directly. Biopeptide adds a modest dose of magnesium glycinate alongside it, not in place of it.
A full dose beats a sprinkle of ten.
Blends that list ten ingredients usually carry a token amount of each. Biopeptide carries its studied active at the studied dose, with two supporting ingredients, every dose printed on the label, so you know exactly what you are taking.
Food-derived, studied for over twenty years.
α-casozepine is released from casein, the main milk protein, by enzymatic digestion. The active peptide was characterized in 2001 and has been studied in people since.
How being wired shows up over time
Stress rarely announces itself. It compounds, and the nervous system that should reset every night stops getting the chance.
Restless Nights
Your mind races the moment you lie down. Falling asleep takes longer, and even a full night in bed leaves you unrefreshed the next morning.
Daytime Tension
You feel on edge for no clear reason. Small things rattle you more than they should, and winding down after work feels almost impossible.
Tired but Wired
Exhaustion and restlessness settle in together. Sleep stays broken, real calm feels out of reach, and you cannot remember the last time your nervous system fully stood down.
What has actually been tested in people
These are findings about the α-casozepine peptide from published research, not outcomes from taking this product. We report each study with its limits.
Sleep onset, measured objectively (Chang et al., Clinical Nutrition, 2024)
A 4-week randomized, double-blind, placebo-controlled trial in adults with sleep difficulties. The αS1-casein hydrolysate shortened the time to fall asleep measured by polysomnography, the laboratory gold standard, compared with placebo.
What it does not show: The 36 participants took 600 mg per day for two weeks and then 300 mg, higher than the 150 mg in Biopeptide. It does not show a treatment effect for any sleep disorder.
Everyday stress in women (Kim et al., European Journal of Clinical Nutrition, 2007)
A double-blind, placebo-controlled crossover study in 63 women. 150 mg per day for 30 days, the dose in every Biopeptide capsule, improved self-reported stress-related symptoms across several everyday domains compared with placebo.
What it does not show: Self-reported questionnaire; the study did not measure cortisol and does not report a percentage improvement, so we do not quote one.
Acute stress response (Messaoudi et al., European Journal of Nutrition, 2005)
A small study in healthy volunteers facing successive mental and physical stress tasks. The hydrolysate was associated with a calmer physiological (blood pressure and heart rate) response to the stressors.
What it does not show: Exploratory and short-term. It shows a physiological pattern, not a clinical outcome.
How the peptide works (Miclo et al., The FASEB Journal, 2001)
The study that identified α-casozepine as the active decapeptide in the hydrolysate and showed its affinity for the GABA-A receptor, the brain's principal calming system.
What it does not show: Laboratory and animal work. It explains the mechanism; the human studies above test the effect.
Why you will not see a cortisol percentage or a "percent less stress" figure here
Figures like that circulate on other sites, but they trace back to unpublished posters and conference abstracts, not peer-reviewed papers. If a number is not in a paper you can read, we do not print it. The evidence base for α-casozepine is genuine but still small, and we describe calm, relaxation and healthy sleep only, never a treatment for any condition.
As your nervous system winds down
How people commonly describe the first twelve weeks. Individual experiences vary; this is not a guarantee of results.
The mental chatter quiets
As α-casozepine begins working with your GABA pathways, the constant mental noise starts to settle. Early changes are usually subtle.
- A quieter, less racing mind
- Easier to switch off at night
Physical tension eases
Stress does not only live in your head. As your system calms, the clenched-jaw, tight-shoulders, restless feeling starts to loosen.
- Less physical tension and restlessness
- Fewer stress-driven stomach knots
Your stress response steadies
With the calming pathway better supported, day-to-day stress stops hitting as hard. You react to the same pressures with more of an even keel.
- Calmer, less reactive under pressure
- Supports a healthy stress-hormone response
Steady days, not just calmer nights
As better sleep and a steadier stress response compound, the daytime payoff shows up: less of the drained, wired burnout.
- Less tired-but-wired fatigue
- Sharper focus and daytime clarity
Adults whose stress follows them to bed
- The 3 AM waker who cannot drop back off
- The tired-but-wired: exhausted, yet unable to switch off
- Shift, travel and irregular schedules
- Midlife, when sleep and stress stop behaving the way they used to
- Men and women alike
Well tolerated in studies, with three clear exceptions
- Contains milk: not for anyone with a milk-protein allergy, and not vegan
- Pregnant, nursing or taking medication: ask your doctor first
- Adults only; not intended for children
- No known dependence or withdrawal; not a sedative
- Do not exceed two capsules per day
The next systems we are working on
Kincadence builds one formula at a time. These are in development and are not for sale yet.
Joints & mobility
An honestly dosed stack for everyday joint comfort, mobility and flexibility, built around ingredients with human trials at the doses those trials used. The formula is being finalized.
Metabolism & gut
Built around a pasteurized, human-studied postbiotic for the gut barrier and metabolic health. Sourcing and regulatory review are in progress.
- Chang C-H, et al. Impact of an αS1-casein hydrolysate on sleep: a randomized, double-blind, placebo-controlled trial. Clinical Nutrition. 2024. PMID 39541860. Source
- Kim JH, et al. Efficacy of αS1-casein hydrolysate on stress-related symptoms in women. European Journal of Clinical Nutrition. 2007;61(4):536–541. PMID 17136040. Source
- Messaoudi M, et al. Effects of a tryptic hydrolysate from bovine milk αS1-casein on hemodynamic responses in healthy human volunteers facing successive mental and physical stress situations. European Journal of Nutrition. 2005;44(2):128–132. PMID 15517308. Source
- Miclo L, et al. Characterization of α-casozepine, a tryptic peptide from bovine αS1-casein with benzodiazepine-like activity. The FASEB Journal. 2001;15(10):1780–1782. PMID 11481228. Source
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Statements are structure/function only and reflect research on the α-casozepine ingredient, not the finished product.