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Fulltext Use of Famotidine and Risk of Severe Course of Illness in Patients With COVID-19: A Meta-analysis

Kow CS, Abdul Sattar Burud I, Hasan SS

Mayo Clin Proc, 2021 05;96(5):1365-1367.
PMID: 33958065 DOI: 10.1016/j.mayocp.2021.03.001
Matched MeSH terms: Histamine H2 Antagonists/adverse effects
Histamine induced decrease of lecithin levels in broncho-alveolar lavage fluid of rats is mediated by H2 receptor

Rao GJ

Asian Pac J Allergy Immunol, 2000 Sep;18(3):169-71.
PMID: 11270474

Lecithin, a major surface active substance of the surfactant system of the lung, was estimated in broncho-alveolar lavage (BAL) fluid in four groups of healthy adult male albino rats. Rats from group I were not administered any drug and acted as controls. Group II were administered histamine diphosphate. Group III were given H1 blocker (pyrilamine maleate) followed by histamine diphosphate. Group IV received H2 blocker (ranitidine hydrochloride) followed by histamine diphosphate. Lecithin content of BAL fluid in the control group was compared with that in the other three groups. A significant decrease in lecithin content was observed in the rats that received either histamine diphosphate or H1 blocker followed by histamine diphosphate. However, compared to control rats no significant difference in lecithin content was seen in rats that received H2 blocker followed by histamine diphosphate. The results clearly indicate that the decrease in surface active lecithin content in BAL fluid following administration of histamine diphosphate was unaffected by prior administration of H1 blocker, but was blocked by prior administration of H2 blocker. It was concluded that histamine induced decrease in lecithin content of BAL fluid is mediated through H2 receptors. Since the predominant source of intra-alveolar lecithin are Type II cells of the alveolar epithelium, It is possible that Type II cells have H2 receptors, stimulation of which resulted in decreased intraalveolar lecithin.

Matched MeSH terms: Histamine/administration & dosage; Histamine/pharmacology*; Histamine H1 Antagonists/pharmacology; Histamine H2 Antagonists/pharmacology; Receptors, Histamine H2/metabolism*
Fulltext Management of chronic urticaria in Asia: 2010 AADV consensus guidelines

Chow SK

Asia Pac Allergy, 2012 Apr;2(2):149-60.
PMID: 22701866 DOI: 10.5415/apallergy.2012.2.2.149

This guideline is a result of a consensus reached during the 19th Asian-Australasian Regional Conference of Dermatology by the Asian Academy of Dermatology and Venereology Study Group in collaboration with the League of Asian Dermatological Societies in 2010. Urticaria has a profound impact on the quality of life in Asia and the need for effective treatment is required. In line with the EAACI/GA(2)LEN/EDF/WAO guideline for the management of urticaria the recommended first-line treatment is new generation, non-sedating H1-antihistamines. If standard dosing is ineffective, increasing the dosage up to four-fold is recommended. For patients who do not respond to a four-fold increase in dosage of non-sedating H1-antihistamines, it is recommended that therapies such as H2-antihistamine, leukotriene antagonist, and cyclosporine A should be added to the antihistamine treatment. In the choice of second-line treatment, both their costs and risk/benefit profiles are the most important considerations.

Matched MeSH terms: Histamine H1 Antagonists; Histamine H2 Antagonists; Histamine H1 Antagonists, Non-Sedating
Schiff base complex/TiO2 chemosensor for visual detection of food freshness level

Sahudin MA, Su'ait MS, Tan LL, Abd Karim NH

Spectrochim Acta A Mol Biomol Spectrosc, 2021 Mar 05;248:119129.
PMID: 33281086 DOI: 10.1016/j.saa.2020.119129

Histamine is one of the important biomarkers for food spoilage in the food sectors. In the present study, a rapid and simple analytical tool has been developed to detect histamine as an indirect strategy to monitor food freshness level. Optical histamine sensor with carboxyl-substituted Schiff base zinc(II) complex with hydroxypropoxy side chain deposited onto titanium dioxide nanoparticles was fabricated and was found to respond successfully to histamine. The Schiff base zinc(II) complex-histamine binding generated an enhancement of the fluorescent signal. Under the optimal reaction condition, the developed sensor can detect down to 2.53 × 10-10 M in the range of between 1.0 × 10-9 and 1.0 × 10-5 M (R2 = 0.9868). Selectivity performance of the sensor towards histamine over other amines was confirmed. The sensor also displayed good reproducibility performances with low relative standard deviation values (1.45%-4.95%). Shelf-life studies suggested that the developed sensor remains stable after 60 days in histamine detection. More importantly, the proposed sensor has been successfully applied to determine histamine in salmon fillet with good recoveries. This strategy has a promising potential in the food quality assurance sectors, especially in controlling the food safety for healthy consumption among consumers.

Matched MeSH terms: Histamine
Changes in urocanic acid, histamine, putrescine and cadaverine levels in Indian mackerel (Rastrelliger kanagurta) during storage at different temperatures

Zare D, Muhammad K, Bejo MH, Ghazali HM

Food Chem, 2013 Aug 15;139(1-4):320-5.
PMID: 23561112 DOI: 10.1016/j.foodchem.2012.12.040

Histamine, putrescine cadaverine and cis-urocanic acid (UCA) have all been implicated or suggested in scombroid fish poisoning. However, there is little information on UCA especially during storage. Changes in their contents during storage of whole Indian mackerel at 0, 3±1, 10±1 for up to 15 days and 23±2°C for up to 2 days were monitored. Fresh muscles contained 14.83 mg/kg trans-UCA, 2.23 mg/kg cis-UCA and 1.86 mg/kg cadaverine. Histamine and putrescine were not detected. After 15 days at 0 and 3°C, trans-UCA content increased to 52.83 and 189.51 mg/kg, respectively, and decreased to <2 mg/kg at the other two temperatures. Storage at 10°C also resulted in an increase in trans-UCA after 3 days, only to decrease after 6 days. The concentration of cis-UCA increased nearly 13-fold after 15 days at 0 and 3°C, decreased at 10°C and remained unchanged at 23°C. Histamine, putrescine and cadaverine levels increased significantly (P value<0.05) at all temperatures especially at 23°C.

Matched MeSH terms: Histamine/analysis*
Fulltext Indication of acid suppression therapy and predictors for the prophylactic use of protonpump inhibitors vs. histamine-2 receptor antagonists in a Malaysian tertiary hospital

Oh AL, Tan AG, Phan HS, Lee BC, Jumaat N, Chew SP, et al.

Pharm Pract (Granada), 2015 Apr-Jun;13(3):633.
PMID: 26445624 DOI: 10.18549/PharmPract.2015.03.633

Proton-pump inhibitors (PPI) and histamine-2 receptor antagonists (H2RA) are common acid suppressants used in gastrointestinal disorders. The trend of usage in Malaysia has changed from predominantly H2RA to PPI from 2007 to 2008, 3.46 versus 2.87 and 2.99 versus 3.24 DDD (Defined Daily Dose)/1000 population/day respectively. This raises concerns as PPI overutilization amounts to higher cost expenditure and are associated with various untoward consequences such as Clostridium difficile-associated diarrhea, pneumonia, and osteoporosis.

Matched MeSH terms: Histamine; Histamine H2 Antagonists
Comparative histamine levels in antemortem and postmortem wounds in the human skin by fluorescence spectrophotometry

Faridah MN, Shahrom AW

Malays J Pathol, 2001 Dec;23(2):111-4.
PMID: 12166591

This paper describes a modified method of quantitative determination of histamine in human skin wounds using fluorescence spectrophotometer. In this study, histamine was used as an indicator to differentiate antemortem from postmortem wounds. Skin samples were obtained from 20 corpses which were brought to Hospital Kuala Lumpur and Universiti Kebangsaan Malaysia for medicolegal autopsy. Sections of human skin were processed biochemically for histamine determination using fluorescence spectrophotometer. Results revealed no significant difference in the histamine content of the antemortem wounds in comparison to postmortem wounds. Based on these results, detection of histamine is not suitable to differentiate antemortem from postmortem wounds.

Matched MeSH terms: Histamine/metabolism*
The depletion effects of chlorpromazine, reserpine and ascorbic acid on tissue histamine of guinea-pigs

Ridzwan BH, Jais AM, Waton NG

Gen. Pharmacol., 1988;19(4):631-6.
PMID: 3410287

1. 30 mg kg-1 chlorpromazine (CPZ) depleted more than half of the tissue histamine from lungs, stomach, ileum and skin of the normal guinea-pigs. However, the drug increased the tissue histamine content in scorbutic animals. 2. In contrast, reserpine depleted histamine from the four tested tissues in both normal and scorbutic animals, except those in the lungs of the control animals. 3. Ascorbic acid only depleted histamine from the stomach and ileum. 4. A 24 hr period was the time limit for CPZ to deplete the histamine in all the four tested tissues. 5. Histamine partially or completely recovered in the tissues after the next 24 hr.

Matched MeSH terms: Histamine/metabolism*
Fulltext Hydroxyzine-induced supraventricular tachycardia in a nine-year-old child

Wong AR, Rasool AH

Singapore Med J, 2004 Feb;45(2):90-2.
PMID: 14985850

Hydroxyzine is a first generation antihistamine widely used in the paediatric population for a variety of conditions. A nine-year-old girl presented with supraventricular tachycardia while on clinical doses of hydroxyzine for pruritus. On arrival at the hospital, she was diaphoretic, with cool peripheries, poor peripheral pulses and a heart rate of 250/minute. There was a history of three palpitation episodes with chest tightness during the five months she was taking hydroxyzine. The supraventricular tachycardia eventually reverted to sinus rhythm with intravenous verapamil. Relevant cardiac examination and investigations had not shown any cardiac abnormalities. After discontinuing hydroxyzine, she had no further episodes of supraventricular tachycardia. To our knowledge, this is the first report of hydroxyzine induced-supraventricular tachycardia in the medical literature.

Matched MeSH terms: Histamine H1 Antagonists/adverse effects*
Determination of biogenic amines in chicken, beef, and mutton by dansyl chloride microwave derivatization in Malaysia

Yue CS, Lim AK, Chia ML, Wong PY, Chin JSR, Wong WH

J Food Sci, 2023 Feb;88(2):650-665.
PMID: 36624628 DOI: 10.1111/1750-3841.16404

In this study, an improved dansyl-chloride derivatization technique using a microwave synthesizer was used for the qualitative and quantitative analyses of biogenic amine in the fresh meat samples. The derivatization technique was optimized in terms of temperature, reaction time, and spinning speed. The derivatization method together with a validated reversed-phase HPLC-DAD method was used for the determination of biogenic amines in chicken, beef, and mutton sold in the wet market. The results of the analyses showed that tryptamine, putrescine, and histamine were generally detected in all the three types of meat. Higher levels of histamine were found in chicken and beef. However, low levels of histamine were observed in mutton. Tyramine was either detected low or moderate in all the three types of meat. The biogenic amines of the fresh meat sold in the wet market is generally higher than the reported values. The mechanisms of biogenic amines-dansyl-chloride formation were investigated and proposed. PRACTICAL APPLICATION: The biogenic amine derivatization method was improved. The improved derivatization method can be potentially used for various food products beside meats for routine biogenic amine analyses due to its fast analysis time and simplicity. High levels of biogenic amines were generally found in the meat sold in the wet markets. However, proper handling of the raw meat can reduce the risk of infection.

Matched MeSH terms: Histamine*
Radioactive uptake of [14C]histamine by certain tissues in guinea-pigs treated and untreated with chlorpromazine

Ridzwan BH, Waton NG

Comp Biochem Physiol C Comp Pharmacol Toxicol, 1990;97(2):251-5.
PMID: 1982867

1. Oral administration of [14C]histamine induced the presence of small amounts of [14C]histamine in stomach and ileal tissues of control guinea-pigs. In contrast, much larger amounts were found after 8 h infusion. 2. Similar amounts of [14C]histamine were found in the tissues when [14C]histamine was given by intravenous infusion from 24-30 h after chlorpromazine injection.

Matched MeSH terms: Histamine/administration & dosage; Histamine/blood; Histamine/pharmacology*
Fulltext Treatment of allergic rhinitis and urticaria: a review of the newest antihistamine drug bilastine

Wang XY, Lim-Jurado M, Prepageran N, Tantilipikorn P, Wang de Y

Ther Clin Risk Manag, 2016;12:585-97.
PMID: 27110120 DOI: 10.2147/TCRM.S105189

Allergic rhinitis and urticaria are common allergic diseases that may have a major negative impact on patients' quality of life. Bilastine, a novel new-generation antihistamine that is highly selective for the H1 histamine receptor, has a rapid onset and prolonged duration of action. This agent does not interact with the cytochrome P450 system and does not undergo significant metabolism in humans, suggesting that it has very low potential for drug-drug interactions, and does not require dose adjustment in renal impairment. As bilastine is not metabolized and is excreted largely unchanged, hepatic impairment is not expected to increase systemic exposure above the drug's safety margin. Bilastine has demonstrated similar efficacy to cetirizine and desloratadine in patients with seasonal allergic rhinitis and, in a Vienna Chamber study, a potentially longer duration of action than fexofenadine in patients with asymptomatic seasonal allergic rhinitis. It has also shown significant efficacy (similar to that of cetirizine) and safety in the long-term treatment of perennial allergic rhinitis. Bilastine showed similar efficacy to levocetirizine in patients with chronic spontaneous urticaria and can be safely used at doses of up to fourfold higher than standard dosage (80 mg once daily). The fourfold higher than standard dose is specified as an acceptable second-line treatment option for urticaria in international guidelines. Bilastine is generally well tolerated, both at standard and at supratherapeutic doses, appears to have less sedative potential than other second-generation antihistamines, and has no cardiotoxicity. Based on its pharmacokinetic properties, efficacy, and tolerability profile, bilastine will be valuable in the management of allergic rhinitis and urticaria.

Matched MeSH terms: Histamine H1 Antagonists; Receptors, Histamine; Histamine H1 Antagonists, Non-Sedating
Effect of histamine on lecithin content in broncho-alveolar lavage fluid of rat

Janardhana Rao G

Asian Pac J Allergy Immunol, 1997 Jun;15(2):77-80.
PMID: 9346270

Deficiency of surfactant in alveoli leads to increased resistance to breathing. Histamine is a mediator in allergic respiratory diseases. Though the bronchoconstrictor effect of histamine is well recognised, histamine may have additional actions that contribute to pathogenesis in these diseases. The present study aimed to observe the effect of histamine on lecithin, a major component of alveolar surfactant. Lecithin content in broncho-alveolar lavage (BAL) fluid of healthy adult male rats was estimated by enzymatic method using Boehringer-Mannheim kits. Lecithin content in these control animals was compared with that in three groups of healthy adult male rats following subcutaneous administration of 0.06 mg of histamine diphosphate at 10 minutes, 30 minutes and 60 minutes intervals, respectively. A significant reduction in lecithin levels in BAL fluid was observed up to one hour after administration of histamine. The results indicate a possible additional action of histamine in the pathogenesis of allergic respiratory diseases.

Matched MeSH terms: Histamine/administration & dosage; Histamine/pharmacology*
Histamine dosage for maximal gastric secretion in Asians - a reappraisal

Ti TK

Ann Acad Med Singap, 1981 Apr;10(2):198-200.
PMID: 7332283

Paired augmented histamine tests using 40 microgram 60 microgram histamine acid phosphate (HAP) per kg body weight were conducted on each of 57 Asian subjects. The mean peak acid output (PAO) for the total series to the two different doses of HAP was 22.3 mEq/hr and 23.3 mEq/hr respectively and the difference was not statistically significant according to the paired t test. There were similarly no significant difference in PAO to the two doses of HAP in the following groups of subjects: 26 Chinese, 17 Indians, 14 Malays; 24 subjects with duodenal ulcer, 16 controls; 28 subjects with body weight below 50 kg, 19 between 50-60 kg and 10 exceeding 60 kg. These findings differ from earlier reports that for maximal gastric secretion Asians required a higher dosage of histamine compared with Caucasian subjects.

Matched MeSH terms: Histamine/administration & dosage; Histamine/analogs & derivatives*
Fatal anaphylaxis of ranitidine injection : have we not learnt the lesson yet?

Chuah YY, Lee YY, Lin LF, Kuo CJ

Acta Gastroenterol Belg, 2019 10 1;82(3):449-450.
PMID: 31566338
Matched MeSH terms: Histamine H2 Antagonists/administration & dosage; Histamine H2 Antagonists/adverse effects*
In vitro anticholinergic and antihistaminic activities of Acorus calamus Linn. leaves extracts

Vijayapandi P, Annabathina V, SivaNagaSrikanth B, Manjunath V, Boggavarapu P, Mohammed P AK, et al.

Afr J Tradit Complement Altern Med, 2012;10(1):95-101.
PMID: 24082330

The present investigation was aimed at determining the effects of hexane, acetone, methanol and aqueous extracts of Acorus calamus leaves (ACHE, ACAE, ACME and ACAQE) on cholinergic and histaminic system using isolated frog rectus abdominis muscle and guinea pig ileum. A dose dependent potentiation of Ach response (anticholinesterase like effect) was found with ACAE and ACME at 0.25, 0.5, 0.75 and 1 mg/ml, but at higher dose of ACAE, ACME, ACAQE and ACHE (5, 20 mg/ml) inhibit the Ach response (antinicotinic effect). These results revealed biphasic effect of Acorus calamus leaves extracts on acetylcholine induced contractile response in isolated frog rectus abdominis muscle preparation (i.e. potentiation effect at lower dose and inhibitory effect at higher dose). Studies on isolated guinea pig ileum demonstrated antihistaminic effect in a dose dependent manner (100-1000 µg/ml) with ACAE, ACME and ACAQE. In addition, the dose dependent inhibition of Ach response (antimuscarinic effect) was observed with ACAE and ACME. In conclusion, Acorus calamus leaves extracts exerts antinicotinic, anticholinesterase like activities in isolated frog rectus abdominis muscle and antihistaminic, antimuscarinic effect in guinea pig ileum. It has been suggested that these observed activities can be further studied for therapeutic potential of Acorus calamus leaves in the treatment of cognitive disorders and asthma.

Matched MeSH terms: Histamine/metabolism; Histamine/pharmacology; Histamine Antagonists/pharmacology*
Fulltext Controlled-release formulation of antihistamine based on cetirizine zinc-layered hydroxide nanocomposites and its effect on histamine release from basophilic leukemia (RBL-2H3) cells

Hasan S, Al Ali H, Al-Qubaisi M, Zobir Hussein M, Ismail M, Zainal Z, et al.

Int J Nanomedicine, 2012;7:3351-63.
PMID: 22848164 DOI: 10.2147/IJN.S30809

A controlled-release formulation of an antihistamine, cetirizine, was synthesized using zinc-layered hydroxide as the host and cetirizine as the guest. The resulting well-ordered nanolayered structure, a cetirizine nanocomposite "CETN," had a basal spacing of 33.9 Å, averaged from six harmonics observed from X-ray diffraction. The guest, cetirizine, was arranged in a horizontal bilayer between the zinc-layered hydroxide (ZLH) inorganic interlayers. Fourier transform infrared spectroscopy studies indicated that the intercalation takes place without major change in the structure of the guest and that the thermal stability of the guest in the nanocomposites is markedly enhanced. The loading of the guest in the nanocomposites was estimated to be about 49.4% (w/w). The release study showed that about 96% of the guest could be released in 80 hours by phosphate buffer solution at pH 7.4 compared with about 97% in 73 hours at pH 4.8. It was found that release was governed by pseudo-second order kinetics. Release of histamine from rat basophilic leukemia cells was found to be more sensitive to the intercalated cetirizine in the CETN compared with its free counterpart, with inhibition of 56% and 29%, respectively, at 62.5 ng/mL. The cytotoxicity assay toward Chang liver cells line show the IC₅₀ for CETN and ZLH are 617 and 670 μg/mL, respectively.

Matched MeSH terms: Histamine Release/drug effects*; Histamine H1 Antagonists, Non-Sedating/administration & dosage*; Histamine H1 Antagonists, Non-Sedating/pharmacokinetics; Histamine H1 Antagonists, Non-Sedating/chemistry
Fulltext Chemical constituents and antihistamine activity of Bixa orellana leaf extract

Yong YK, Zakaria ZA, Kadir AA, Somchit MN, Ee Cheng Lian G, Ahmad Z

BMC Complement Altern Med, 2013 Feb 14;13:32.
PMID: 23410184 DOI: 10.1186/1472-6882-13-32

BACKGROUND: Bixa orellana L. has been traditionally used in Central and South America to treat a number of ailments, including internal inflammation, and in other tropical countries like Malaysia as treatment for gastric ulcers and stomach discomfort. The current study aimed to determine the major chemical constituents of the aqueous extract of B. orellana (AEBO) and to evaluate the antihistamine activity of AEBO during acute inflammation induced in rats.
METHODS: Acute inflammation was produced by subplantar injection of 0.1 mL of 0.1% histamine into the right hind paw of each rat in the control and treatment groups. The degree of edema was measured before injection and at the time points of 30, 60, 120, 180, 240 and 300 min after injection. Changes of peritoneal vascular permeability were studied using Evans blue dye as a detector. Vascular permeability was evaluated by the amount of dye leakage into the peritoneal cavity in rats. To evaluate the inhibitory effect of AEBO on biochemical mediators of vascular permeability, the levels of nitric oxide (NO) and vascular endothelial growth factor (VEGF) were determined in histamine-treated paw tissues. The major constituents of AEBO were determined by gas chromatography-mass spectrometry (GC-MS) analysis.
RESULTS: AEBO produced a significant inhibition of histamine-induced paw edema starting at 60 min time point, with maximal percentage of inhibition (60.25%) achieved with a dose of 150 mg/kg of AEBO at 60 min time point. Up to 99% of increased peritoneal vascular permeability produced by histamine was successfully suppressed by AEBO. The expression of biochemical mediators of vascular permeability, NO and VEGF, was also found to be downregulated in the AEBO treated group. Gas chromatography-mass spectrometry (GC-MS) analysis revealed that the major constituent in AEBO was acetic acid.
CONCLUSIONS: The experimental findings demonstrated that the anti-inflammatory activity of AEBO was due to its inhibitory effect on vascular permeability, which was suppressed as a result of the reduced expression of biochemical mediators (NO and VEGF) in tissues. Our results contribute towards the validation of the traditional use of Bixa orellana in the treatment of inflammatory disorders.

Matched MeSH terms: Histamine/metabolism; Histamine/pharmacology; Histamine Antagonists/pharmacology; Histamine Antagonists/therapeutic use*
Fulltext Bixa orellana leaf extract suppresses histamine-induced endothelial hyperpermeability via the PLC-NO-cGMP signaling cascade

Yong YK, Chiong HS, Somchit MN, Ahmad Z

BMC Complement Altern Med, 2015;15:356.
PMID: 26468073 DOI: 10.1186/s12906-015-0901-3

Histamine is established as a potent inflammatory mediator and it is known to increased endothelial permeability by promoting gap formation between endothelial cells. Previous studies have shown that aqueous extract of Bixa orellana leaves (AEBO) exhibits antihistamine activity in vivo, yet the mechanism of its action on endothelial barrier function remains unclear. Therefore, the current study aimed to determine the protective effect of AEBO against histamine-induced hyperpermeability in vitro.

Matched MeSH terms: Histamine/adverse effects; Histamine/metabolism
Fulltext Biogenic amine content in various types of tofu: occurrence, validation and quantification

Yue, C.S., Ng, Q.N., Lim, A.K., Lam, M. H., Chee, K.N.

International Food Research Journal, 2019;26(3):999-1009.
MyJurnal

In the present work, the biogenic amines tryptamine (TRP), putrescine (PUT), histamine (HIS), tyramine (TYR) and spermidine (SPD) were determined in 32 various types of tofu that were obtained from different states in Malaysia. Three main types of tofu; soft tofu, firm tofu and processed tofu, were analysed in the present work. The biogenic amine contents in the respective types of tofu were analysed by a reversed-phase HPLC with a DAD detector after the aqueous extraction and derivatisation with dansyl chloride. The LOD values ranged from 0.019 mg/L for PUT to 0.028 mg/L for TYR. While, the LOQ values ranged from 0.063 mg/L (PUT) to 0.096 mg/L (TYR). The recovery values for all the five amines ranged from 80.3% to 120.5% with RSD ≤ 3.1%. The total levels of biogenic amines found varied, ranging from 1.5 mg/kg to 687.9 mg/kg, with mean values (p < 0.05) in descending order of 44.6, 12.6, 9.1, 4.8 and 4.7 mg/kg for PUT, TYR, SPD, HIS and TRP, respectively. PUT and TRP were the most prevailing biogenic amines and they were found respectively in 90.62% of the tofu analysed. Significant positive correlations (r = 0.266 to 0.874, p < 0.05) were found between some individual biogenic amines and protein content in all the three types of tofu. However, negative correlations (r = -0.246 to -0.832, p < 0.05) were observed between biogenic amines and moisture content, and between biogenic amines and water activity in all the three types of tofu. Significant and strong correlations (r = 0.525 to 0.999, p < 0.05) were found between most of the individual biogenic amines and the total biogenic amines. Those tofu exceeding the legal limits may affect the health of sensitive individuals.

Matched MeSH terms: Histamine

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