Quality Evaluation and Safety of Commercially Available Nutraceutical and Formulated Products

Lockwood, G.

doi:10.1002/9781118504956.ch4

Cited by 2 publications

(1 citation statement)

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“…The glucosamine in supplements usually comes from the shells of shellfish, though there is also a synthetic form. These products have been shown to have variable compliance with labelled contents, probably caused by the use of a range of sources of starting materials and the chemical forms used (Lockwood, 2015). This may explain the reason why standardized global regulations are difficult to develop for such products.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the pharmaceutical quality of two nutraceutical lysine products in South Africa

Jonathan¹,

Norman²

2022

Afr. J. Pharm. Pharmacol.

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Dietary supplements, particularly nutraceuticals, are an expanding sector on the South African market, especially since the beginning of the COVID-19 pandemic. However, regulatory authorities do not regulate nutraceuticals and concern arose regarding safety, quality and efficacy of the product reaching the end-user. The aim of the study was to evaluate the pharmaceutical quality, specifically the physical and the in-vitro release properties of two commonly marketed L-lysine products in South Africa. An experimental design was used. Two L-lysine products, a tablet and a capsule, available on the South African market were evaluated for pharmaceutical quality. Tests performed were: Weight variation test, dimensions test, friability test, hardness test, assay, and drug release studies. The quality of products was compared to official USP standards. Tablets were of consistent diameter, length and thickness. Not more than 2 tablets had weights outside the 5% deviation range for each sample. Tablets had an average friability of 17.56%, although their hardness was greater than the acceptable range. All tablets disintegrated within the 15 min. Two out of three samples had amount of lysine below the acceptable range. Tablets sampled released just about 70% of the contained L-lysine by 45 min. Capsules had inconsistent powder weight and contained an amount of L-lysine less than the label claim. Capsules disintegrated within 4 min and released just over 75% of drug by 45 min. There seems to be inconsistences in the characteristics of L-lysine products and their quality cannot be guaranteed. More investigations on other marketed L-lysine products are suggested, to further advice on the necessity of a relook of their quality assurance procedures and labelling.

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Section: Introductionmentioning

confidence: 99%