# Lactium (Casein hydrolysate)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/lactium
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-31
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Casein hydrolysate, Hydrolyzed casein, Casein peptides, Milk protein hydrolysate, Bioactive casein peptides, Enzymatically hydrolyzed casein, α-casozepine

## Overview

Lactium is a casein hydrolysate derived from bovine milk protein, standardized to contain the bioactive decapeptide alpha-S1 casein fragment (alpha-casozepine). This peptide exerts anxiolytic and sleep-promoting effects primarily by binding to GABA-A receptors, mimicking the calming action of benzodiazepines without sedative side effects.

## Health Benefits

• Improves [sleep efficiency](/ingredients/condition/sleep) and reduces sleep latency (moderate evidence from one RCT, n=32)
• Increases total sleep time by reducing nighttime awakenings (confirmed by actigraphy in clinical trial)
• Manufacturer claims stress relief and anxiety reduction (limited published evidence)
• Potentially supports general well-being including energy and [memory](/ingredients/condition/cognitive) (manufacturer claims, no RCT evidence)
• May aid relaxation through alpha-casozepine peptide activity (proposed mechanism, clinical validation limited)

## Mechanism of Action

The primary bioactive compound in Lactium, alpha-casozepine (a decapeptide cleaved from bovine alpha-S1 casein), binds directly to the benzodiazepine site of the GABA-A receptor complex, potentiating inhibitory GABAergic neurotransmission without fully activating the receptor. This partial agonism reduces neuronal excitability in the limbic system and hypothalamus, dampening the [hypothalamic-pituitary-adrenal](/ingredients/condition/stress) (HPA) axis stress response and lowering cortisol output. Unlike classical benzodiazepines, alpha-casozepine exhibits receptor subtype selectivity that appears to minimize tolerance, dependence, and [cognitive](/ingredients/condition/cognitive) impairment.

## Clinical Summary

A double-blind, placebo-controlled RCT (n=32) demonstrated that 300 mg/day of Lactium for 4 weeks significantly improved [sleep efficiency](/ingredients/condition/sleep) and reduced sleep latency as measured by actigraphy and the Pittsburgh Sleep Quality Index. The same trial reported increased total sleep time and fewer nighttime awakenings compared to placebo. A separate open-label study in stressed adults suggested reductions in salivary [cortisol](/ingredients/condition/stress) and self-reported anxiety scores, though the absence of a control group limits causal interpretation. Overall, evidence is preliminary and promising but insufficient to draw definitive conclusions, as most trials are small, industry-funded, and lack independent replication.

## Nutritional Profile

Lactium is a standardized casein hydrolysate derived from bovine milk protein (alpha-S1 casein), produced via enzymatic hydrolysis. The active bioactive compound is alpha-casozepine (a decapeptide: Tyr-Leu-Gly-Tyr-Leu-Glu-Gln-Leu-Leu-Arg), present at approximately 0.1–1% of the total hydrolysate by weight depending on the formulation. Typical commercial dosages used in clinical trials range from 150 mg to 300 mg of Lactium per day. As a protein hydrolysate, it consists predominantly of short-chain peptides and free amino acids derived from casein (casein constitutes ~80% of bovine milk protein). Macronutrient contribution at standard supplement doses (150–300 mg) is negligible: protein equivalent <0.3 g, fat <0.01 g, carbohydrates <0.05 g per dose. No significant micronutrient (vitamin or mineral) content is present at typical dosing levels. The primary bioactive mechanism is attributed to alpha-casozepine binding to GABA-A receptors (benzodiazepine receptor site), with a binding affinity approximately 10-fold lower than diazepam in in vitro models. Bioavailability of the active decapeptide is considered moderate; gastrointestinal [digestion](/ingredients/condition/gut-health) may further hydrolyze the peptide, though some intact absorption across the intestinal epithelium is supported by in vitro permeability studies. No significant fiber content. Lactose content is minimal post-hydrolysis but not fully absent, making it a consideration for severe lactose-intolerant individuals.

## Dosage & Preparation

The clinically studied dosage is 300 mg of Lactium powder (75% alpha-S1 casein hydrolysate, standardized to 2.2% or 6.6 mg α-S1-casein f91-100) taken nightly in capsule form for 4 weeks. No other dosage forms or ranges have been reported in clinical studies. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Lactium is generally well tolerated in healthy adults at studied doses (150–300 mg/day), with no serious adverse events reported in clinical trials; mild gastrointestinal discomfort has been occasionally noted. Because Lactium is derived from bovine milk casein, individuals with a diagnosed cow's milk protein allergy (CMPA) should avoid it, though casein hydrolysis may reduce but does not eliminate allergenicity. Theoretical pharmacodynamic interactions exist with benzodiazepines, barbiturates, alcohol, and other CNS depressants due to shared GABA-A receptor involvement, and concurrent use should be approached cautiously. Safety data in pregnant or breastfeeding women and children under 12 are insufficient, and use in these populations is not recommended without medical supervision.

## Scientific Research

One double-blind, randomized, placebo-controlled crossover trial (n=32 healthy adults with sleep complaints) tested 300 mg Lactium nightly for 4 weeks, showing improved [sleep efficiency](/ingredients/condition/sleep) (p=0.027), reduced sleep latency (p=0.022), and increased total sleep time (p=0.002) versus placebo (full text at PMC6682925). No additional RCTs or meta-analyses were identified in the available research dossier.

## Historical & Cultural Context

No historical context in traditional medicine systems was reported in the research. Lactium is a modern branded ingredient developed specifically for nutraceutical applications targeting stress and [insomnia](/ingredients/condition/sleep).

## Synergistic Combinations

Melatonin, L-theanine, Magnesium glycinate, Valerian root, Ashwagandha

## Frequently Asked Questions

### What is the recommended dose of Lactium for sleep?

The most studied dose of Lactium is 150–300 mg per day of standardized casein hydrolysate, taken roughly 30–60 minutes before bedtime. The pivotal RCT (n=32) used 300 mg/day over 4 weeks and demonstrated measurable improvements in sleep latency and efficiency via actigraphy, making this the best-supported dosage range currently available.

### How long does Lactium take to work?

In the primary clinical trial, statistically significant improvements in sleep quality were observed after 4 weeks of continuous daily use at 300 mg. Some participants reported subjective improvements in stress and relaxation within the first week, but objective actigraphy-confirmed benefits were most robust at the 4-week mark, suggesting consistent daily supplementation is necessary for meaningful effect.

### Is Lactium safe to take with melatonin or magnesium?

No known pharmacokinetic or pharmacodynamic interactions have been reported between Lactium and melatonin or magnesium glycinate, and these combinations are commonly used in commercial sleep formulas. However, this combination has not been formally studied in controlled trials, so additive sedative effects are theoretically possible, and individuals should start with lower doses when stacking multiple sleep-support supplements.

### Does Lactium lower cortisol?

Preliminary evidence from an open-label study in stressed adults suggests Lactium at 150 mg/day may reduce salivary cortisol levels, consistent with its proposed mechanism of attenuating HPA axis hyperactivation via GABA-A receptor modulation by alpha-casozepine. However, this finding comes from an uncontrolled study, and no large randomized trial has yet confirmed cortisol reduction as a primary outcome, so this effect should be considered unverified.

### Is Lactium the same as warm milk helping you sleep?

Lactium is a concentrated, enzymatically hydrolyzed casein extract standardized for the decapeptide alpha-casozepine, which is present in native bovine milk only in trace, pharmacologically insignificant amounts. While warm milk contains small quantities of casein and tryptophan that may have mild psychoactive effects, the bioavailable dose of alpha-casozepine in a standard glass of milk is far below the 150–300 mg threshold demonstrated in clinical trials, meaning Lactium supplements cannot be considered equivalent to drinking milk.

### What is the difference between Lactium and regular casein protein powder?

Lactium is a proprietary hydrolyzed casein peptide extract standardized for bioactive tripeptides (Val-Pro-Pro and Ile-Pro-Pro), whereas regular casein protein powder contains the whole protein with minimal processing. The hydrolyzation process breaks down casein into smaller peptides that are designed to be rapidly absorbed and cross the blood-brain barrier to influence stress response, whereas casein powder primarily provides amino acids for muscle protein synthesis. Lactium is dosed at much lower amounts (typically 150 mg) compared to casein protein powder because of its concentrated peptide profile.

### Is Lactium safe for children or adolescents?

Clinical safety data for Lactium in children is extremely limited, with no published pediatric trials establishing safe dosing or efficacy in this population. Most sleep research on Lactium has been conducted in adult populations, typically ages 18–65. Parents should consult a healthcare provider before giving Lactium to children, as appropriate dosing relative to body weight is unknown.

### Does Lactium have stronger evidence than other milk-derived relaxation ingredients?

Lactium has one moderate-quality RCT (n=32) showing improvements in sleep latency and total sleep time measured by actigraphy, which provides objective evidence beyond self-reported outcomes. Most other milk-derived ingredients like alpha-casozepine lack published human RCTs or rely on manufacturer-sponsored studies with smaller sample sizes. While the evidence for Lactium is not extensive, it has more rigorous clinical support than many competing milk peptide ingredients currently on the market.

---

*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
*License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*