Research Snapshot
Saffron
A synthesis of the peer-reviewed evidence for Saffron across mood, cognition, oxidation and neuroprotection, graded by scientific consensus and reviewed by our Scientific Advisory Board.
See the Research
MoodDoes saffron supplementation improve mood?
Evidence from 26 studies
What the research shows
Multiple randomized, placebo-controlled human trials consistently show that saffron stigma extract supplementation improves mood, emotional wellbeing, and reduces subclinical depressive and anxiety symptoms in healthy adults, with effects comparable to standard antidepressants in more severe populations. Systematic reviews and meta-analyses of human trials corroborate these findings, and mechanistic/animal studies support plausible neurochemical and anti-inflammatory pathways underlying these mood benefits. Overall, the evidence base is strong and consistent across both clinical and general adult populations, supporting saffron's role in promoting positive mood.
View the top studies
The Journal of nutrition | Lopresti AL, Smith SJ, Marx W | | 2025
Randomized Control Trial (RCT) , Double Blind Study
This large 12-week randomized, double-blind, placebo-controlled trial examined a standardized saffron extract (Affron) in 202 adults with subclinical depressive symptoms. Saffron supplementation produced significant improvements in mood and general wellbeing compared with placebo, extending prior smaller-scale findings to a larger, longer-duration sample.
The American journal of clinical nutrition | Amadieu C, Leyrolle Q, Farneti M | 1 | 2025
Randomized Control Trial (RCT) , Double Blind Study
This randomized, double-blind, placebo-controlled trial tested a 6-week saffron extract supplementation program in healthy adults with subclinical depressive, anxiety, and fatigue symptoms. Saffron supplementation improved mood outcomes relative to placebo and the study explored underlying inflammatory and biological mechanisms.
Frontiers in Nutrition | Philippa A. Jackson, Joanne S. Forster, Julie Khan | 55 | 2021
Double Blind Study
This 8-week randomized, double-blind, parallel-group trial assessed a standardized 30 mg saffron extract in healthy adults reporting subclinical low mood, anxiety, and stress. Saffron supplementation improved emotional wellbeing and modulated psychological response to an acute laboratory stressor compared with placebo.
Pharmacopsychiatry | Alireza Ghajar, Seyedeh Morvarid Neishabouri, Narges Velayati | 111 | 2016
Randomized Control Trial (RCT) , Animal Trial , Double Blind Study , Highly Cited
This double-blind controlled clinical trial compared saffron (30 mg/day) to the antidepressant citalopram (40 mg/day) over 6 weeks in adults with major depressive disorder and anxious distress. Both saffron and citalopram produced significant, comparable improvements in depression and anxiety rating scale scores, supporting saffron's mood-modulating effects.
CognitionDoes saffron supplementation support cognitive function?
Evidence from 40 studies
What the research shows
Evidence spans human randomized trials in cognitively impaired and attention-disordered populations, animal behavioral studies, and cellular mechanistic work, and it consistently points toward saffron stigma extract and its key compounds (crocin, crocetin, safranal) supporting cognitive function, attention, and neuronal health. The strongest human evidence comes from a meta-analysis of RCTs in people with cognitive impairment and a controlled attention-disorder trial, while much of the supporting mechanistic detail (e.g., anti-amyloid, anti-tau effects) still derives from animal and in vitro models rather than large-scale human cognition trials in healthy adults.
View the top studies
BMC Complementary Medicine and Therapies | Zahra Ayati, Guoyan Yang, Mohammad Hossein Ayati | 55 | 2020
Randomized Control Trial (RCT) , Systematic Review , Meta Analysis
This systematic review and meta-analysis pooled randomized controlled trials testing saffron (stigma extract or standardized preparations) in adults with mild cognitive impairment or dementia. Saffron supplementation was associated with significant improvements in cognitive function scores compared with placebo, with a safety profile comparable to placebo and similar efficacy to some conventional anti-dementia medications in head-to-head trials.
Journal of Child and Adolescent Psychopharmacology | Sara Baziar, Ali Aqamolaei, Ebrahim Khadem | 45 | 2019
Randomized Control Trial (RCT) , Double Blind Study
In this randomized, double-blind pilot trial, children with attention-deficit/hyperactivity disorder received saffron stigma extract or the stimulant methylphenidate for six weeks. Saffron produced comparable improvements in attention and hyperactivity symptom scores to methylphenidate, suggesting a beneficial effect on attention-related cognitive domains.
Frontiers in molecular neuroscience | Priya V, Ahmad F. | | 2026
In Vitro Trial
This animal study examined whether saffron stigma extract could counteract cognitive impairment and anxiety-like behavior induced by chronic cold stress in aged rats. Saffron administration improved performance on cognitive/behavioral tests and reduced stress-related anxiety behavior, supporting a neuroprotective and cognition-enhancing effect of saffron's bioactive constituents (crocin, crocetin, safranal).
Frontiers in Neuroscience | Ioanna Chalatsa, Demetrios A. Arvanitis, Nikolaos Stavros Koulakiotis | 68 | 2019
In Vitro Trial
Using neuronal cell culture models relevant to Alzheimer's-type pathology, this mechanistic study tested the saffron-derived compounds trans-crocin 4 and trans-crocetin, both major constituents of saffron stigma. Treatment reduced markers of the amyloidogenic pathway and abnormal tau processing, providing a cellular mechanism by which saffron's bioactive compounds could support neuronal health and cognitive function.
OxidationDoes crocin reduce oxidative stress markers?
Evidence from 40 studies
What the research shows
Across the collected literature, saffron's key active compounds, crocin and safranal, consistently reduce oxidative stress markers such as lipid peroxidation, DNA damage, and depleted antioxidant enzymes in cell, animal, and human studies. While most of this evidence comes from preclinical (animal and cell-based) research, a placebo-controlled human trial and a meta-analysis of human trials also support reductions in oxidative stress biomarkers with crocin supplementation, lending convergent support to its role in supporting antioxidant defenses.
View the top studies
Journal of biochemical and molecular toxicology | Ghiasian M, Khamisabadi F, Kheiripour N | 57 | 2019
Randomized Control Trial (RCT) , Double Blind Study
In this placebo-controlled human trial, crocin supplementation for 28 days significantly reduced oxidative DNA damage and other oxidative stress markers in blood compared with placebo, alongside reductions in inflammatory markers. This is one of the few controlled human trials directly measuring oxidative stress biomarkers after crocin intake.
Phytotherapy research : PTR | Bahari H, Shahraki Jazinaki M, Aghakhani L | 18 | 2025
Randomized Control Trial (RCT) , Systematic Review , Meta Analysis
This systematic review and meta-analysis pooled randomized controlled trials examining crocin supplementation's effects on inflammatory and oxidative stress markers in humans. The pooled analysis found favorable effects of crocin on multiple oxidative stress biomarkers, supporting its role as an antioxidant-supportive supplement.
Evidence-based Complementary and Alternative Medicine | Hossein Hosseinzadeh, Mohammad-Hadi Saeed Modaghegh, Zahra Saffari | 176 | 2007
Animal Trial , Highly Cited
In a rat model of ischemia-reperfusion injury, treatment with saffron extract and its constituents crocin and safranal reduced lipid peroxidation (TBARS) and preserved antioxidant sulfhydryl groups in skeletal muscle. These findings demonstrate that the specific active compounds in the product, crocin and safranal, exert measurable antioxidant protection in vivo.
Anais da Academia Brasileira de Ciências | Bahareh Golrokh Amin, Khalil Abnous, Vahideh Sadat Motamedshariaty | 57 | 2014
N/A
Ethanolic and aqueous extracts of Crocus sativus stigma reduced oxidative stress, inflammation, and apoptosis markers in the spinal cord of rats following nerve injury. This study directly tests whole saffron stigma extract, matching the product's plant part and form, and shows clear antioxidant benefits in vivo.
NeuroprotectionDoes crocin protect neurons from oxidative damage?
Evidence from 40 studies
What the research shows
Across cell culture, animal, and human research, crocin consistently reduces markers of oxidative stress, such as lipid peroxidation, reactive oxygen species, and oxidative DNA damage, while supporting neuronal survival and function. A human randomized controlled trial in a clinical population found reduced oxidative DNA damage with crocin supplementation, reinforcing a large body of consistent preclinical (cell and animal) evidence, though most mechanistic detail still comes from non-human studies.
View the top studies
Parkinsonism & related disorders | Mohammad Soleymani S, Assarzadegan F, Habibi SAH | 3 | 2024
Randomized Control Trial (RCT)
This randomized controlled trial in adults with idiopathic Parkinson's disease tested oral crocin against placebo and measured neuronal oxidative DNA damage alongside movement scores. Crocin supplementation was associated with reductions in oxidative DNA damage markers, providing direct human evidence that crocin can mitigate oxidative neuronal stress.
Neuroscience letters | Ochiai T, Ohno S, Soeda S | 170 | 2004
Animal Trial , Highly Cited
This foundational in vitro study exposed neuron-like PC-12 cells to serum/glucose deprivation to induce oxidative membrane damage and found that crocin prevented lipid peroxidation, partially restored superoxide dismutase activity, and preserved neuronal morphology. Crocin's antioxidant potency exceeded that of alpha-tocopherol at equal concentrations.
International Journal of Molecular Medicine | Chunyue Wang, Xueying Cai, Wenji Hu | 131 | 2018
Animal Trial , Highly Cited
Using both a hippocampal neuronal cell line exposed to glutamate toxicity and an animal model, this study showed that crocin pretreatment increased cell viability, reduced apoptosis, mitigated mitochondrial dysfunction, and suppressed reactive oxygen species and calcium overload. These findings support a direct neuroprotective antioxidant mechanism for crocin.
Arquivos de Neuro-Psiquiatria | Ziba Rajaei, Maede Hosseini, Hojjatallah Alaei | 76 | 2016
N/A
In a rodent model of dopaminergic neurodegeneration, chronic crocin treatment reduced hippocampal lipid peroxidation and nitrite levels that were elevated by the toxin lesion, and this biochemical protection was accompanied by improved memory performance. The results indicate crocin's antioxidant action extends to brain regions affected by neurodegenerative injury.
Reviewed by Experts
Every research snapshot is checked by our independent Scientific Advisory Board: physicians, botanists and pharmacology researchers who verify the evidence grading and its interpretation.
Kerry Hughes
M.Sc., RH(AHG), FDN-P
Ethnobotanist & herbalist; Berkeley Herbal Center; principal at EthnoPharm.
View full profile →Lance Dreher
PhD, Nutritional Counseling
Performance nutrition & conditioning; four decades of applied training science.
View full profile →Dr. Lindsey Faucette
DO, FAAFP
Board-certified in Family & Integrative Medicine; Touro University College of Osteopathic Medicine.
View full profile →Francisco Chacon
PhD, Plant Biology
Botanical natural products & phytochemistry researcher, Penn State University.
View full profile →Meet the full Scientific Advisory Board →
How We Grade Consensus
For each benefit we retrieve the relevant peer-reviewed literature and classify every study by whether its findings support (Yes), partially or conditionally support (Possibly), or do not support (No) the claim. The donut shows the share of studies in each category; N is the number of studies analyzed for that benefit.
Grades reflect the weight and direction of the current evidence, not a guarantee of outcome, and the interpretation is verified by the Scientific Advisory Board.