EverZen™ (Corn-Derived 6-MBOA Stress/Mood Bioactive — Nutrition 21)

Evidence Level
Limited
2 Clinical Trials
5 Documented Benefits
2/5 Evidence Score

EverZen™ is Nutrition21's patent-pending plant-based ingredient — standardized to 6-methoxy-2-benzoxazolinone (6-MBOA), a bioactive extracted from young non-GMO corn (Zea mays) leaves. In plants, 6-MBOA protects against insect, fungal, and bacterial stress. Proposed mechanisms include supporting the brain's production of mood-related neurochemicals and modulating calming neural receptors, which may help stabilize cortisol — but these are preliminary and not demonstrated in humans for EverZen. No EverZen-specific human trials are published or indexed in PubMed; the closest human evidence is a 4-week RCT of a different standardized corn-leaf extract (UP165, Unigen), which reduced salivary cortisol and improved sleep and mood. Typically used at 250 mg/day.

Studied Dose 250 mg/day.
Active Compound Corn (Zea mays) leaf extract standardized to 6-methoxy-2-benzoxazolinone (6-MBOA).

Benefits

Cortisol stabilization (stress hormone modulation)

A 4-week RCT of a related standardized corn-leaf extract (UP165, a different product) reduced salivary cortisol by up to ~36%; EverZen itself has no published human trial, so any effect on cortisol — the body's primary stress hormone — is inferred from this analog, not directly demonstrated. Chronically elevated cortisol drives multiple health problems including weight gain, sleep disruption, and cardiovascular issues. Cortisol modulation supports consumers feeling mentally balanced, resilient, and at ease vs reactive to daily stressors.

Mood enhancement via neurochemical production

EverZen's proposed mechanism involves supporting production of key neurochemicals that may facilitate positive mood — a preliminary, unproven mechanism not yet demonstrated in humans. Distinct from suppressive anti-anxiety mechanisms — addresses mood by supporting the brain's own positive neurochemistry. The mood-enhancing benefits complement stress reduction for comprehensive emotional wellness applications.

Relaxation via brain receptor enhancement

EverZen is proposed to modulate brain receptors involved in relaxation — a preliminary mechanism intended to support calm without sedation, not confirmed in humans. The receptor-enhancing mechanism works synergistically with neurochemical production effects. Dual-action approach addresses both the upstream (neurochemicals) and downstream (receptors) of mood and stress pathways.

Healthy stress response (not suppression)

Positioned to support a healthy stress response — appropriate cortisol activity when needed rather than chronic over-activation. This framing rests on analog (UP165) data, not an EverZen trial. Supports a calm mood during occasional stress without affecting daytime function or alertness.

4-week clinical onset

In the related UP165 corn-leaf extract RCT, cortisol, sleep, and mood measures improved over 4 weeks; a similar timeframe is proposed for EverZen, though EverZen has not been directly tested and 'diminish anxiety' is not an established structure/function outcome. Fast onset for an emotional wellness ingredient — many botanical stress supplements require 8-12 weeks for measurable effects. Practical for consumers seeking noticeable benefits within reasonable timeframe.

Mechanism of action

1

6-MBOA neurochemical production support

6-methoxy-2-benzoxazolinone (6-MBOA) is proposed to support the brain's production of key neurochemicals associated with positive mood, though this is unproven in humans. Mechanism is upstream — addressing the production rather than just receptor activation. The novel plant bioactive class is structurally distinct from common adaptogens or amino acid precursors.

2

Brain receptor enhancement

6-MBOA is proposed to modulate brain receptors involved in relaxation — potentially supporting calm without sedation. This receptor mechanism is unproven in humans and may involve GABAergic, serotonergic, or related calming neural pathways. Multi-target mechanism explains the broad stress and mood applications.

3

HPA axis modulation (cortisol regulation)

6-MBOA is proposed to modulate the hypothalamic-pituitary-adrenal (HPA) axis — the central stress response system — consistent with the cortisol reduction observed in the analog UP165 RCT (a different product), though not directly tested for EverZen. Cortisol stabilization (rather than suppression) supports healthy stress responses. Mechanism class shared with established adaptogens but via different specific compound.

4

Dual-action approach

EverZen's proposed dual-action mechanism is hypothesized to combine neurochemical production and receptor enhancement, addressing both upstream and downstream of mood/stress pathways. This combined mechanism is not established in humans.

5

Plant defense compound bioactivity

6-MBOA is the plant's natural defense compound, protecting against environmental stressors. Whether this plant bioactivity translates to human stress applications is speculative and not established.

Clinical trials

1
Human Evidence — Analog Corn-Leaf Extract RCT (UP165), Not EverZen
PubMed

No EverZen-specific clinical studies are published or indexed in PubMed. The closest human evidence is a single 4-week double-blind RCT (n=45) of a different standardized corn-leaf extract (UP165, Unigen; Talbott 2023) reporting reduced salivary cortisol and improved sleep and mood. Two of four authors were Unigen employees.

Adults with stress and mood concerns. Clinical study populations supporting EverZen efficacy.

In the analog UP165 RCT, salivary cortisol fell and sleep and mood (POMS) improved over 4 weeks. EverZen is dosed at 250 mg/day, but no EverZen human trial has been published to substantiate cortisol, mood, or stress-response claims for the ingredient itself; the 'two-study replication' described in marketing materials is not indexed in PubMed.

2
6-MBOA Mechanism Class Evidence

Preclinical and mechanistic research supporting 6-MBOA (6-methoxy-2-benzoxazolinone) bioactivity. Investigates neurochemical production support and brain receptor enhancement mechanisms proposed to underlie the marketed claims; these derive from preclinical/animal work, with no 6-MBOA human data indexed in PubMed. Novel plant bioactive class research.

Not applicable — preclinical and mechanistic research base for 6-MBOA bioactivity.

6-MBOA is a plant benzoxazolinone characterized mainly in animal studies (notably rodent/vole reproduction). The proposed neurochemical-production and brain-receptor effects underlying mood/relaxation claims are speculative and not established in humans; no 6-MBOA human mood/stress studies are indexed in PubMed. Plant defense compound origin translates to human stress response support via conserved biological pathways. Foundation for clinical outcomes.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated; non-GMO corn-sourced.
Mild GI effects rare.
Light 250 mg dose supports favorable safety profile.
Neutral taste — supports broad consumer applications.
Newer ingredient (launched 2025) — long-term human data still accumulating.
Pregnancy and lactation: insufficient supplemental data; consult clinician.
Corn allergy — verify allergen status for sensitive individuals.

Important Drug interactions

Antidepressants (SSRIs, MAOIs) — possible interaction via neurochemical modulation; consult prescriber.
Anti-anxiety medications (benzodiazepines, buspirone) — possible interaction via receptor modulation; consult prescriber.
Antihypertensive medications — minimal interaction concern.
Cortisol-related medications (corticosteroids) — possible interaction via HPA axis modulation; consult prescriber.
Other stress/adaptogen supplements (ashwagandha, rhodiola, Holixer) — generally complementary.
Pregnancy and lactation: consult clinician.
Autoimmune conditions — consult clinician before use.

Frequently asked questions about EverZen™ (Corn-Derived 6-MBOA Stress/Mood Bioactive — Nutrition 21)

What is EverZen?

EverZen™ is Nutrition21's patent-pending plant-based ingredient — standardized to 6-methoxy-2-benzoxazolinone (6-MBOA), a bioactive extracted from young non-GMO corn (Zea mays) leaves. In plants, 6-MBOA protects against insect, fungal, and bacterial stress.

What is EverZen used for?

EverZen is researched primarily for Stress & Anxiety and Mood & Mental Health. A 4-week RCT of a related standardized corn-leaf extract (UP165, a different product) reduced salivary cortisol by up to ~36%; EverZen itself has no published human trial, so any effect on cortisol — the body's primary stress hormone — is i…

What is the recommended dosage of EverZen?

The clinically studied dose is 250 mg/day. Always follow the product label and check with a healthcare provider for personal advice.

Is EverZen safe, and does it have side effects?

For most healthy adults, EverZen is well tolerated at studied doses. Reported effects can include: Generally well-tolerated; non-GMO corn-sourced. Mild GI effects rare. It may also interact with some medications. EverZen is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does EverZen interact with any medications?

Possible interactions include: Antidepressants (SSRIs, MAOIs) — possible interaction via neurochemical modulation; consult prescriber. Anti-anxiety medications (benzodiazepines, buspirone) — possible interaction via receptor modulation; consult prescriber. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for EverZen?

NutraSmarts rates the evidence for EverZen as Limited (2 out of 5). It is backed by 2 clinical trials and 1 cited reference summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(1 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Talbott SM, Talbott JA, Brownell L, Yimam M UP165, A Standardized Corn Leaf Extract for Improving Sleep Quality and Mood State Journal of Medicinal Food. 2023;26(1):59-67. doi: 10.1089/jmf.2021.0197.PubMedUsed to support: 4-week double-blind RCT (n=45) of a standardized Zea mays (corn) leaf extract (UP165) showing significant reductions in salivary cortisol (up to 36%), improved total sleep time, sleep quality, and mood scores (POMS) vs. placebo. This is the closest published human RCT evidence for EverZen's cortisol stabilization and mood enhancement claims. Caution: UP165 is a different commercial product (Unigen) from EverZen (Nutrition21); two of four authors were Unigen employees; extrapolation assumes similar standardization. EverZen-specific human trial data not found in PubMed.