Complete clinical monograph for Saffron Extract (affron®) — the clinically-validated botanical for mood support, emotional resilience, and stress adaptation with the largest evidence base of any saffron extract
Nature’s antidepressant — with clinical evidence to match pharmaceuticals. Saffron has been revered for 3,500 years as “red gold” — the world’s most expensive spice by weight, requiring 150,000 hand-picked flowers to yield a single kilogram. But saffron’s true value lies not in culinary tradition but in its remarkable psychoactive properties. Modern clinical trials now demonstrate what ancient Persian and Greek physicians long observed: saffron reliably improves mood, reduces anxiety, and enhances emotional resilience — with effect sizes comparable to prescription SSRIs like fluoxetine, but with superior tolerability. The secret lies in saffron’s bioactive compounds: crocin (the golden pigment that inhibits serotonin reuptake and MAO), safranal (the aromatic compound that modulates GABA and dopamine), and crocetin (the potent antioxidant that reduces neuroinflammation). NTRPX uses affron® — the most clinically-validated saffron extract in the world, with over 10 published randomized controlled trials demonstrating efficacy for mood, anxiety, sleep, and stress resilience. Standardized to ≥3.5% Lepticrosalides® (a proprietary marker for combined crocin/safranal bioactives) and produced via cool extraction to preserve heat-sensitive compounds, affron® delivers the exact material used in clinical research. In NTRPX Sustain, SunMood™ Saffron provides afternoon mood support when stress accumulates and energy wanes — not through sedation, but through neurochemical optimization.
Crocin acts as a non-competitive MAO-A and MAO-B inhibitor:
MAO Isoform
Crocin Effect
Clinical Relevance
MAO-A
Non-competitive inhibition (Ki ~10 μM)
↑ Serotonin, norepinephrine in brain
MAO-B
Non-competitive inhibition
↑ Dopamine; neuroprotection
Key Distinction from Pharmaceutical MAOIs: Saffron’s MAO inhibition is mild and reversible — not comparable to pharmaceutical MAOIs like phenelzine. No dietary tyramine restrictions required.
A novel mechanism discovered in affron® research:Evidence (2021 RCT): affron® 28mg increased evening salivary melatonin concentrations vs. placebo (Lopresti et al., Sleep Medicine 2021).
Clinical studies are organized by branded extract to ensure transparency about which evidence directly supports the selected ingredient (affron®) versus supporting evidence from similar extracts.
Landmark Study: Largest Saffron RCT Ever Conducted (2025)
Citation: Lopresti AL, Smith SJ, Marx W, et al. An Examination into the Effects of a Saffron Extract (Affron) on Mood and General Wellbeing in Adults Experiencing Low Mood: A Randomized, Double-Blind, Placebo-Controlled Trial. J Nutr. 2025;155(7):2300-2311. Link:PubMed PMID: 40414301
Citation: Lopresti AL, Drummond PD, Inarejos-García AM, Prodanov M. affron®, a standardised extract from saffron (Crocus sativus L.) for the treatment of youth anxiety and depressive symptoms: A randomised, double-blind, placebo-controlled study. J Affect Disord. 2018;232:349-357. Link:PubMed PMID: 29510352
Parameter
Detail
Design
RCT, double-blind, placebo-controlled
N
80 youth (68 completers)
Population
Ages 12-16, mild-moderate anxiety/depression
Intervention
affron® 14mg twice daily (28mg total) vs. placebo
Duration
8 weeks
Outcome (Youth Self-Report)
affron®
Placebo
p-value
Overall internalizing symptoms
33% ↓
17% ↓
p = 0.029
Separation anxiety
Significant ↓
—
p = 0.003
Social phobia
Significant ↓
—
p = 0.023
Depression
Significant ↓
—
p = 0.016
Significance: First and only saffron trial in adolescents — demonstrating efficacy in a vulnerable population with limited treatment options.
Citation: Kell G, Rao A, Beccaria G, Clayton P, Inarejos-García AM, Prodanov M. affron® a novel saffron extract (Crocus sativus L.) improves mood in healthy adults over 4 weeks in a double-blind, parallel, randomized, placebo-controlled clinical trial. Complement Ther Med. 2017;33:58-64. Link:PubMed PMID: 28735826
Citation: Lopresti AL, Smith SJ, Hood SD, Drummond PD. Efficacy of a standardised saffron extract (affron®) as an add-on to antidepressant medication for the treatment of persistent depressive symptoms in adults: A randomised, double-blind, placebo-controlled study. J Psychopharmacol. 2019;33(11):1415-1427. Link:PubMed PMID: 31347436
Parameter
Detail
Design
RCT, double-blind, placebo-controlled
Population
Adults with persistent depression on antidepressants
Key Finding: Clinician-rated MADRS showed significantly greater improvement with saffron adjunct versus placebo adjunct. Demonstrates safety and efficacy when combined with standard antidepressants.
Citation: Lopresti AL, Smith SJ. An examination into the mental and physical effects of a saffron extract (affron®) in recreationally-active adults: A randomized, double-blind, placebo-controlled study. J Int Soc Sports Nutr. 2022;19(1):219-238. Link:PubMed PMID: 35702753
Parameter
Detail
N
128 recreationally-active adults
Duration
8 weeks
Results: Significant improvements in mood (POMS-SF) and heart rate variability in males. Demonstrates efficacy in healthy, active population.
These studies use a different branded saffron extract (Safr’Inside™ by Activ’Inside) with similar standardization. They provide supporting evidence for saffron’s efficacy but are not the exact material used in NTRPX.
Citation: Pourtau L, Joffre F, Gourmelen M, et al. Acute Effect of a Saffron Extract (Safr’InsideTM) and Its Main Volatile Compound on the Stress Response in Healthy Young Men: A Randomized, Double Blind, Placebo-Controlled, Crossover Study. Nutrients. 2023;15(13):2921. Link:PubMed PMID: 37447245
Parameter
Detail
Design
Crossover RCT, 3-arm
N
19 healthy young men (18-25)
Intervention
Single dose: Safr’Inside™ 30mg vs. safranal 0.06mg vs. placebo
Stress Test
Maastricht Acute Stress Test (MAST)
Key Findings:
Saffron and safranal significantly reduced subjective stress and anxiety vs. placebo (p < 0.05)
Delayed time to peak salivary cortisol and cortisone
Suggests acute anxiolytic effect and HPA axis modulation
Citation: Jackson PA, et al. Effect of a saffron extract on sleep quality in adults with moderate insomnia: A decentralized, randomized, double-blind, placebo-controlled trial. Sleep Health. 2025 (published July 2025). Link:ScienceDirect
Parameter
Detail
Design
3-arm RCT
N
165 adults (28-52 years)
Intervention
Safr’Inside™ 30mg vs. 20mg vs. placebo
Duration
4 weeks
Results:
Significant reduction in Athens Insomnia Scale (AIS) vs. placebo (β = -0.95, p < 0.05)
Sleep quality improvements within 21 days
Perceived stress significantly reduced at both doses
Citation: Hausenblas HA, Saha D, Dubyak PJ, Anton SD. Saffron (Crocus sativus L.) and major depressive disorder: a meta-analysis of randomized clinical trials. J Integr Med. 2013;11(6):377-383. Link:PMC Free Article
Parameter
Finding
Studies included
5 RCTs
Effect size vs. placebo
d = 1.62 (Large effect)
Effect size vs. antidepressants
d = -0.04 (No difference)
Conclusion
”Saffron significantly reduced depression symptoms compared to placebo”
Citation: Marx W, Lane M, Rocks T, et al. Effect of saffron supplementation on symptoms of depression and anxiety: a systematic review and meta-analysis. Nutr Rev. 2019;77(8):557-571. Link:PubMed PMID: 31135916
Parameter
Finding
Studies included
23 RCTs
Effect size (depression vs. placebo)
g = 0.99 (Large)
Effect size (anxiety vs. placebo)
g = 0.95 (Large)
Effect size (adjunct to antidepressants)
g = 1.23
Note
Evidence of publication bias; more non-Iranian trials needed
No significant effect on evening cortisol (baseline not elevated)
Jackson 2021 (Stress)
Delayed peak cortisol response to acute stressor
Rat studies
HPA axis modulation under stress (not baseline)
Interpretation: Saffron appears to modulate the stress response when stressed, rather than lowering baseline cortisol. This is consistent with adaptogenic activity.
Saffron’s sleep benefits were initially observed as secondary outcomes in mood trials, then validated in dedicated sleep studies. Evidence is organized by branded extract.
Citation: Lopresti AL, Smith SJ, Drummond PD. An investigation into an evening intake of a saffron extract (affron®) on sleep quality, cortisol, and melatonin concentrations in adults with poor sleep: a randomised, double-blind, placebo-controlled, multi-dose study. Sleep Med. 2021;86:7-18. Link:PubMed PMID: 34438361
Parameter
Detail
Design
3-arm RCT (placebo vs. 14mg vs. 28mg)
N
120 adults with unsatisfactory sleep
Duration
28 days
Timing
1 hour before bed
Novel Measure
Evening salivary melatonin and cortisol
Key Sleep Findings:
Outcome
affron® Effect
Placebo Effect
Significance
Sleep quality ratings
Significant ↑
Minimal
Primary outcome met
Mood after awakening
Significant ↑
Minimal
p < 0.05
ISQ total score
Significant ↓
Minimal
p < 0.05
Insomnia classification
24% reduction
6% reduction
Significant
Evening melatonin
Significant ↑
No change
Novel finding
Significance: First human trial demonstrating saffron increases evening melatonin — providing a mechanistic explanation for sleep benefits.
Citation: Lopresti AL, Smith SJ, Metse AP, Drummond PD. Effects of saffron on sleep quality in healthy adults with self-reported poor sleep: a randomized, double-blind, placebo-controlled trial. J Clin Sleep Med. 2020;16(6):937-947. Link:PubMed PMID: 32043961 | JCSM Full Text
Parameter
Detail
Design
RCT, double-blind, placebo-controlled
N
63 healthy adults (55 completers)
Population
Self-reported sleep problems
Intervention
affron® 14mg twice daily vs. placebo
Duration
28 days
Results:
Significant improvement in ISI total score (p = 0.017)
Significant improvement in RSQ total score (p = 0.029)
Significant improvement in sleep quality ratings (p = 0.014)
Citation: Jackson PA, et al. Effect of a saffron extract on sleep quality in adults with moderate insomnia: A decentralized, randomized, double-blind, placebo-controlled trial. Sleep Health. 2025. Link:ScienceDirect
Citation: Lang L, et al. A standardised saffron extract improves subjective and objective sleep quality in healthy older adults with sleep complaints: results from the Gut-Sleep-Brain Axis randomised, double-blind, placebo-controlled pilot study. Preprint 2025.
Parameter
Detail
Design
RCT, placebo-controlled
N
52 older adults
Format
30mg gummy
Duration
4 weeks
Novel Measure
Microbiome analysis (n=26 subset)
Results:
Decreased PSQI global score
Increased sleep efficiency percentage
Improved sleep initiation and maintenance
Increased abundance of beneficial gut bacteria (SCFA producers)
Significance: First evidence linking saffron’s sleep benefits to gut microbiome modulation.
Citation: De la Fuente Muñoz M, et al. Effects of Supplementation with the Standardized Extract of Saffron (affron®) on the Kynurenine Pathway and Melatonin Synthesis in Rats. Antioxidants. 2023;12(8):1619. Link:PubMed PMID: 37627617Key Mechanistic Findings:
In 2021, EFSA (European Food Safety Authority) issued a positive opinion on affron® for a “positive mood” health claim — a rare achievement for a botanical ingredient, requiring substantial evidence of efficacy and safety.
Saffron + Antidepressants: Several studies have used saffron as an adjunct to standard antidepressants with positive results and good tolerability. However, anyone on psychiatric medication should consult their prescriber before adding saffron.
Tier Rationale: Tier 2 (Supported) classification. Saffron (affron®) demonstrates consistent, clinically-meaningful benefits for mood, anxiety, and sleep across multiple well-designed RCTs, including the largest saffron trial ever conducted (n=202). Effect sizes for depression are large (d=1.62 vs. placebo) and comparable to pharmaceutical antidepressants. Mechanisms are well-elucidated (SERT, MAO, GABA, BDNF, melatonin). Safety is excellent with GRAS status and an EFSA-approved health claim. Not Tier 1 (Foundation) because primary applications are mood-specific rather than foundational metabolic support, and long-term (>12 week) data is more limited than for compounds like creatine.
Both reduce anxiety but through different mechanisms:
Mechanism
Saffron
Ashwagandha
GABA-A modulation
✓ (Safranal)
✓ (Triethylene glycol)
Serotonin enhancement
✓ (Primary)
Indirect
HPA axis modulation
Under stress only
✓ (Primary; ↓ cortisol)
BDNF upregulation
✓
✓
Synergy: Saffron addresses the neurotransmitter aspect of anxiety; ashwagandha addresses the hormonal aspect. Together, they provide comprehensive anxiolytic coverage.
Both are evidence-based botanicals for mood. Key differences:
St. John’s Wort: More drug interactions (CYP450 induction); may affect birth control, HIV meds, etc.
Saffron: Minimal drug interactions; safer with medications
Efficacy: Both comparable to SSRIs in trials
NTRPX choice: Saffron due to superior safety profile and interaction compatibility
Can I take saffron with my antidepressant?
In clinical trials, saffron has been used as an adjunct to SSRIs with good tolerability and enhanced effects. However, you should ALWAYS consult your prescribing physician before combining any supplement with psychiatric medication. Do not stop or modify your medication without medical guidance.
Is saffron safe for teenagers?
Yes — affron® is one of the few saffron extracts tested in adolescents (12-16 years) with positive results for anxiety and depression symptoms. However, youth mental health should be managed with appropriate professional support. Saffron may be considered as part of a comprehensive approach, not as sole treatment.
Will saffron make me drowsy?
No. At the 28mg dose, saffron is not sedating. It improves mood and may secondarily improve sleep quality (via melatonin enhancement), but it doesn’t cause daytime drowsiness. This is why it’s suitable for afternoon use in Sustain.
How is affron® different from other saffron supplements?
affron® is the most clinically-validated saffron extract:
Manufactured by Pharmactive (Madrid) with full traceability
Generic saffron extracts lack this validation.
Why 28mg and not higher?
28mg is the dose used in the majority of positive clinical trials. Higher doses have been tested (up to 100mg), but don’t show proportionally greater benefits and increase cost. 28mg represents the optimal efficacy-to-cost ratio supported by evidence.
Can saffron help with PMS symptoms?
Yes. Several trials have shown saffron improves PMS-related mood symptoms, though this isn’t the primary focus of affron® research. The serotonergic effects are particularly relevant for premenstrual mood disturbance.
Is saffron safe long-term?
The longest published trial is 12 weeks with excellent safety. Saffron has been consumed as a spice for 3,500 years. While very long-term supplementation data is limited, there’s no mechanistic concern for tolerance, dependence, or cumulative toxicity at the 28mg dose.
SunMood Summary: Saffron extract (affron® 28mg in Sustain) is the most clinically-validated botanical for mood support — with over 10 published RCTs demonstrating effects comparable to SSRI antidepressants but with superior tolerability. The active compounds crocin and safranal work through serotonin reuptake inhibition, MAO inhibition, GABA modulation, BDNF upregulation, and a novel melatonin-enhancing pathway via kynurenine modulation. The 2025 trial (n=202) — the largest saffron study ever — showed 72% of participants experienced significant mood improvement with 53% reduction in depression scores. affron® specifically is standardized to ≥3.5% Lepticrosalides®, uses cool extraction to preserve heat-sensitive compounds, and carries an EFSA-approved health claim for “positive mood.” In NTRPX Sustain, SunMood™ Saffron provides afternoon mood resilience when stress accumulates — not through sedation, but through neurochemical optimization that supports emotional balance and sustained wellbeing.
Version: 1.0 | Last Updated: January 23, 2026 | Document Status: Complete Clinical MonographThis monograph establishes the Saffron (affron®) framework for NTRPX Systems. affron® was selected over alternative branded extracts (e.g., Safr’Inside™) based on its unmatched clinical trial portfolio, EFSA health claim approval, and Lepticrosalides® standardization. The 28mg dose aligns with the majority of positive RCTs. Placement in Sustain (afternoon) optimizes for daytime mood support while avoiding redundancy with the dedicated sleep compounds in Recover/Luna.