# CerebroPlex (N-acetyl-L-tyrosine)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/cerebroplex
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-29
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** N-acetyl-L-tyrosine, NALT, N-Ac-Tyr, Acetyl-L-tyrosine, N-acetyltyrosine, L-tyrosine N-acetyl ester, NAT

## Overview

N-acetyl-L-tyrosine (NALT) is an acetylated form of the amino acid L-tyrosine, a precursor to the catecholamine [neurotransmitter](/ingredients/condition/cognitive)s [dopamine](/ingredients/condition/mood), norepinephrine, and epinephrine. Its acetylated structure increases water solubility compared to L-tyrosine, though evidence that this meaningfully improves bioavailability or cognitive outcomes in humans remains limited.

## Health Benefits

• Enhanced tyrosine availability for [neurotransmitter](/ingredients/condition/cognitive) synthesis - theoretical benefit based on mechanism, no clinical evidence provided • Improved water solubility compared to L-tyrosine - established chemical property, clinical significance unclear • Potential stress support through catecholamine precursor activity - mechanistic rationale only, no human trials cited • Possible cognitive support via [dopamine](/ingredients/condition/mood)/norepinephrine pathways - theoretical based on biochemistry, no clinical validation • Parenteral nutrition applications - limited evidence from one 1985 study (PMID: 3925425)

## Mechanism of Action

N-acetyl-L-tyrosine is deacetylated in vivo by hepatic and renal acylases to release free L-tyrosine, which is then hydroxylated by tyrosine hydroxylase (TH) — the rate-limiting enzyme — converting it to L-DOPA, a direct precursor to [dopamine](/ingredients/condition/mood). Dopamine is subsequently converted to norepinephrine via dopamine beta-hydroxylase (DBH), and further to epinephrine via phenylethanolamine N-methyltransferase (PNMT). By replenishing the L-tyrosine pool, NALT theoretically sustains catecholamine synthesis under conditions of high neurological demand or stress-induced depletion.

## Clinical Summary

Direct clinical trials on the branded CerebroPlex formulation are not publicly available. Research on parent compound L-tyrosine in humans — including studies of 100–150 mg/kg doses in military and cognitive stress settings — shows modest improvements in [working memory](/ingredients/condition/cognitive) and mood under acute stress, but effects in healthy, non-stressed individuals are minimal. A 2015 meta-analysis of L-tyrosine studies found consistent but small cognitive benefits primarily under conditions of catecholamine depletion. NALT-specific human trials are sparse, and whether NALT's acetylated form offers superior clinical outcomes over equivalent doses of L-tyrosine has not been established in controlled studies.

## Nutritional Profile

N-acetyl-L-tyrosine (NALT) is a acetylated derivative of the amino acid L-tyrosine, not a whole food ingredient. Macronutrient contribution is negligible at typical supplemental doses (300–750 mg/day). Protein content: NALT is an amino acid derivative contributing approximately 0.3–0.75 g of amino acid equivalent per typical dose, though bioconversion to free L-tyrosine is required for metabolic utility. No fiber, significant fat, or carbohydrate content. No vitamins or minerals present. Bioactive compound: NALT itself at ~99% purity in pharmaceutical-grade forms; molecular weight 238.24 g/mol compared to L-tyrosine at 181.19 g/mol, meaning per gram of NALT, approximately 76% by mass is the active tyrosine moiety. Bioavailability note: NALT is water-soluble (significantly more so than L-tyrosine), which was the rationale for its development; however, human pharmacokinetic studies (Magnusson et al., 1994; van Spronsen et al.) indicate NALT has poor renal reabsorption and is largely excreted intact in urine rather than deacetylated to free tyrosine, suggesting bioconversion efficiency may be substantially lower than plain L-tyrosine. Free L-tyrosine serves as precursor to catecholamines ([dopamine](/ingredients/condition/mood), norepinephrine, epinephrine) and [thyroid](/ingredients/condition/hormonal) hormones; plasma tyrosine elevation from NALT supplementation is documented but potentially less efficient gram-for-gram than L-tyrosine itself.

## Dosage & Preparation

No clinically studied dosage ranges for oral supplementation (powder, capsule, or extract forms) are available in the research. The only documented use was intravenous administration in parenteral nutrition contexts, but specific doses were not provided. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

N-acetyl-L-tyrosine is generally considered safe at typical supplemental doses of 300–2000 mg/day, with side effects including nausea, heartburn, headache, and fatigue reported at higher doses. Because NALT raises catecholamine levels, it may interact with MAO inhibitors (MAOIs), potentially causing hypertensive crisis, and should be used cautiously alongside stimulant medications such as amphetamines or [thyroid](/ingredients/condition/hormonal) hormones like levothyroxine. Individuals with hyperthyroidism, Graves' disease, or melanoma should avoid tyrosine supplementation, as tyrosine is a precursor to both thyroid hormones and melanin. Pregnant and breastfeeding women should consult a physician before use, as safety data in these populations is insufficient.

## Scientific Research

Clinical evidence for N-acetyl-L-tyrosine is extremely limited. Only one human study from 1985 (PMID: 3925425) examined NALT as an intravenous tyrosine source during parenteral nutrition using radiolabeled compounds, but [cognitive](/ingredients/condition/cognitive) or neurological outcomes were not reported. No randomized controlled trials, meta-analyses, or large-scale human studies evaluating oral supplementation or cognitive benefits were identified.

## Historical & Cultural Context

N-acetyl-L-tyrosine has no traditional or historical medicinal use, as it is a modern synthetic compound developed for improved solubility. It does not appear in any traditional medicine systems and was created specifically for pharmaceutical and nutritional applications.

## Synergistic Combinations

L-tyrosine, B-complex vitamins, vitamin C, iron, folate

## Frequently Asked Questions

### Is N-acetyl-L-tyrosine better than L-tyrosine?

Despite higher water solubility, pharmacokinetic studies — including work by Magnusson et al. — suggest NALT may actually have lower bioavailability than L-tyrosine because deacetylation is incomplete, meaning less free tyrosine reaches circulation per gram consumed. Most researchers currently consider L-tyrosine the more reliable choice for raising plasma tyrosine levels at equivalent doses.

### What is the recommended dosage for N-acetyl-L-tyrosine?

Typical supplemental doses of NALT range from 300 mg to 2000 mg per day, often split into 1–3 servings. Because NALT yields less free tyrosine per milligram than L-tyrosine, some practitioners suggest multiplying an equivalent L-tyrosine dose by approximately 1.2–1.4 to account for incomplete conversion, though no standardized clinical dosing guideline exists specifically for NALT.

### Does N-acetyl-L-tyrosine improve memory or focus?

Evidence from L-tyrosine research suggests cognitive benefits are most pronounced under acute stress, sleep deprivation, or cold exposure — conditions that deplete prefrontal catecholamines. A 2007 study by Hase et al. found L-tyrosine (150 mg/kg) improved multitasking performance under cognitive demand. Benefits in healthy, rested individuals appear negligible based on current data.

### Can N-acetyl-L-tyrosine be taken with antidepressants?

NALT is contraindicated with monoamine oxidase inhibitors (MAOIs) such as phenelzine or tranylcypromine, as increased catecholamine availability combined with impaired MAO-mediated breakdown can trigger hypertensive crisis. Caution is also warranted with SSRIs and SNRIs, where additive dopaminergic or noradrenergic activity is theoretically possible, and a healthcare provider should be consulted before combining these agents.

### How long does it take for N-acetyl-L-tyrosine to work?

Plasma tyrosine levels rise within approximately 1–2 hours of oral NALT ingestion, paralleling the pharmacokinetic profile of L-tyrosine. Acute cognitive or mood effects, when they occur, are typically observed within this same window — making it most commonly taken 30–60 minutes before a stressful task or cognitive demand. Chronic benefits from daily supplementation in healthy individuals have not been well-documented in clinical literature.

### What is CerebroPlex and how does it differ from standard N-acetyl-L-tyrosine supplements?

CerebroPlex is a branded formulation of N-acetyl-L-tyrosine (NALT), a more water-soluble derivative of the amino acid L-tyrosine. The acetyl group attached to tyrosine improves its solubility in water compared to free L-tyrosine, potentially allowing for better absorption and bioavailability. However, the clinical significance of this enhanced solubility and whether CerebroPlex offers superior results compared to other NALT products has not been definitively established in human studies.

### Is CerebroPlex safe to take with stimulant medications or ADHD treatments?

Since N-acetyl-L-tyrosine acts as a precursor to catecholamines (dopamine and norepinephrine), combining CerebroPlex with stimulant medications or ADHD drugs like amphetamines or methylphenidate may potentially amplify stimulant effects and should be discussed with a healthcare provider first. Individuals taking thyroid medications should also consult their doctor, as tyrosine supplementation can interfere with thyroid hormone absorption. Medical supervision is recommended before combining CerebroPlex with any prescription medications that affect neurotransmitter levels.

### Who is most likely to benefit from CerebroPlex supplementation?

CerebroPlex may be of interest to individuals experiencing occasional stress, fatigue, or those seeking cognitive support, as tyrosine is theoretically important for neurotransmitter synthesis during periods of mental or physical demand. However, robust clinical evidence demonstrating who specifically benefits most from this branded formulation is lacking. Those with low dopamine symptoms, chronic stress, or demanding cognitive tasks may experience the proposed benefits, though individual response varies significantly and published human trials are limited.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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