Table 3 Clinical trials investigating the safety and efficacy of phytochemicals in regulating inflammation and efferocytosis.

From: Phytochemical-mediated efferocytosis and autophagy in inflammation control

NCT number

Phyto chemical

Condition/Disorder (Sample Size)

Dose

Duration

Location

Phase(Status)

Results

NCT06003270

Quercetin

COPD (n = 30)

500 mg/day

1000 mg/day

Six Ms

United States

II (Recruiting)

No Results Posted

NCT01708278 [152]

Quercetin

COPD (n = 9)

500, 1000 or 2000 mg/day

One W

United States

1 (Completed)

-Quercetin was safely tolerated by COPD patients at doses up to 2000 mg per day for 1 week.

-No severe adverse events were found related to the quercetin supplementation.

-Only mild adverse events (e.g., gastro-oesophageal reflux disease, were observed in the placebo & quercetin groups).

NCT04851821

Quercetin

COVID-19 (n = 80)

NA

Ten Ds

Tunisia

1 (Completed)

No Results Posted

NCT04377789

QCB

COVID-19 (n = 447)

1000 mg quercetin

2–30 Ds

Turkey

Not Applicable (Completed)

- A greater decrease in CRP & ferritin levels.

- A higher increase in platelet & lymphocyte counts.

- The QCB group had more advanced pulmonary findings [222].

NCT01348204

Quercetin

CF (n = 32)

NA

NA

United States

II (Completed)

No Results Posted

NCT00402623

Quercetin

Sarcoidosis

(n = 18)

1000 mg

24 Hs

Netherlands

Not Applicable (Completed)

-Improving the total plasma antioxidant capacity.

-Reducing markers of oxidative stress (plasma malondialdehyde levels) & inflammation (plasma ratios of TNF-α/IL-10 & IL-8/IL-10) [156].

NCT04603690

Quercetin, curcumin & vitamin D3

SARS-CoV-2 (n = 50)

168 mg curcumin, 260 mg quercetin & 360 IU of vitamin D3

14 Ds

Pakistan

Not Applicable (Completed)

COVID-19-associated acute symptoms were resolved more quickly in the CUR-QUE group.

The CUR-QUE supplementation was well-tolerated, & no treatment-emergent effects or serious adverse events were reported [223].

NCT02255370

Curcumin

Crohn’s disease (n = 61)

3 g/d

6 Ms

France

3 (Completed)

Curcumin was not more effective than placebo in preventing Crohn’s disease recurrence [149].

NCT00528151

Curcumin

LHON (n = 70)

500 mg/day

3, 6, & 12 Ms

Thailand

3 (Completed)

No Results Posted

NCT03122613

Curcumin

UC (n = 29)

2 g/day

12 Ms

Hong Kong

Not Applicable (Terminated)

No Results Posted

NCT00815763

Ginsenoside-Rd

Ischemic Stroke (n = 390)

20 mg

14 Ds

China

3 (Completed)

No Results Posted

NCT04163757

Crocin

Type 2 diabetes (n = 50)

NA

12 Ws

Iran

Not Applicable (Completed)

-Showing improvements in:

- Fasting glucose level, HbA1C, Plasma insulin level, Insulin resistance, & Insulin sensitivity.

- The active form of AMPK did not change significantly within or between the groups after the intervention [150].

NCT05696665

Apigenin

Crocin

Neurodegenerative &

Parkinson Disease (n = 120)

500 mg,

30 mg

NA

Pakistan

Not Applicable (Recruiting)

No Results Posted

NCT03470376

Monacolin K, berberine, policosanol 1, astaxanthin, folic acid & CoQ10

Hypercholesterolemia

Inflammation

Atherosclerosis (n = 26)

3, 500,

10, 0.5,

0.2 & 2 mg

3 Ms

Perugia

4 (Completed)

- No significant effects were observed for HDL-cholesterol, triglycerides, or lipoprotein(a).

- The nutraceutical combination treatment was well-tolerated, with no significant alterations in muscle, liver, or immunovirological parameters.

-Improving the lipid profile, PCSK9 levels, subclinical inflammation, and arterial stiffness in stable HIV-infected patients on antiretroviral therapy [224].

NCT05915117

Pomegranate

Metabolic Syndrome (n = 60)

500/mg

8 Ws

Bosnia & Herzegovina

Not Applicable (Active, not recruiting)

No Results Posted

NCT01269723

SFN

Smoking (n = 51)

NA

21 Ds

United States

Not Applicable (Completed)

-Promise as a safe, low-cost strategy for reducing influenza risk among smokers [225, 226]

NCT01181830

PCA

Metabolic Syndrome

Family & Diabetes (n = 14)

8.1 mmol

NA

Italy

4 (Completed)

-Short-term ingestion of broccoli sprout homogenates can reduce virus-induced inflammation & viral replication in the nasal passages of smokers.

-Nutritional antioxidant interventions with BSH have promise as a safe, low-cost strategy for reducing influenza risk among smokers & other high-risk populations [151].

NCT02998918

Purcumin & resveratrol

Inflammation/

Atherosclerosis/

CVD (n = 21)

500 mg

1 W

United States

Not Applicable (Completed)

No Results Posted

NCT01492114

Resveratrol

Chronic Subclinic Inflammation/

Redox Status (n = 40)

500 mg

30 Ds

Italy

3 (Completed)

No Results Posted

NCT01637675

Tanshinone IIA

CVD/

Lung Diseases (n = 90)

80 mg

8 Ws

China

2&3 (Unknown status)

Tanshinones, especially tanshinone I, were identified as cap-dependent endonuclease inhibitors with broad-spectrum antiviral effects [227].

NCT05130671

CQC

Mild Symptoms of COVID-19

(n = 50)

168 mg curcumin; 260 mg quercetin; 9 µg of cholecalciferol

2 W

Pakistan

Not Applicable (Completed)

-The CQC adjuvant therapy was safe & well-tolerated, with no treatment-emergent effects or adverse events reported.

-The co-supplementation of CQC may have a therapeutic role in the early stage of COVID-19, helping with viral clearance, symptom resolution, & modulation of the inflammatory response [157].

  1. CF Cystic Fibrosis, CVD Cardiovascular disease, BSH Broccoli sprout homogenates, COPD Chronic obstructive pulmonary disease, HbA1C Hemoglobin A1C, LHON Leber’s Hereditary Optic Neuropathy, CUR-QUE A combined curcumin and quercetin, CQC Curcumin, quercetin, and cholecalciferol, PCSK9 Proprotein convertase subtilisin/kexin type 9, PCA Protocatechuic acid, SARS-CoV-2 Severe Acute Respiratory Syndrome Coronavirus 2, SFN Sulforaphane, QCB Quercetin, vitamin C, and bromelain, UC Ulcerative colitis, CRP C-reactive protein; (M Months, W Week, D Day, Hs Hours).