When discussing the safety of a food supplement ingredient, the focus often shifts immediately to toxicological studies, published literature or available analytical data. These are clearly essential elements, but they do not represent the real starting point of the assessment. Before any meaningful scientific evaluation can begin, it is necessary to define exactly what ingredient is being assessed, how it is produced and whether its regulatory status has been correctly framed.
What is the regulatory framework for food supplements?
Food supplements fall within the broader legal category of foods and are regulated at the EU level by Directive 2002/46/EC.
They are defined as foodstuffs intended to supplement the normal diet and consist of concentrated sources of nutrients or other substances with a nutritional or physiological effect, marketed in dose form.
That said, the regulatory framework is only partially harmonized. Vitamins and minerals are subject to a more clearly defined European framework, while other substances, including botanicals and many single compounds, remain largely governed by national rules and interpretations. As a result, the regulatory assessment of food supplement ingredients is often more complex than operators initially expect.
At the national level, additional obligations may also apply. In Italy, for example, food supplements must be notified before being placed on the market. This notification is a mandatory step, but it does not amount to authorization. The responsibility for the product’s compliance and safety, therefore, remains fully with the operator.
When does the Novel Food Regulation come into play?
A food supplement ingredient may be considered either traditional or novel. Under Regulation (EU) 2015/2283, Novel Food is a food that was not consumed to a significant degree within the European Union before 15 May 1997. If an ingredient falls within this definition, it cannot be lawfully marketed without prior EU authorization.
This point is crucial because it highlights a connection that is not always immediately perceived by the operator: Novel Food status is a regulatory matter, while safety is a scientific one. These are separate issues, but they are closely connected within the same assessment pathway, and that connection is exactly what lies at the basis of the Regulation. The authorization is, on practical terms, a safety assessment of the new food.
Where does the safety assessment really start?
From a practical perspective, the safety assessment of an ingredient begins with characterization and not only with toxicology.
Identity, composition, specification profile, impurities, residues, source material and manufacturing process are the core elements needed to understand what substance is actually being assessed. Without this data, the scientific evaluation risks becoming abstract, disconnected from the product that will ultimately be placed on the market.
This is particularly relevant for complex ingredients such as botanicals. Variations in concentration, extraction ratio, composition, the presence of specific constituents, and the solvents used for extraction in the production process may significantly affect both the toxicological profile and the regulatory assessment of Novel Food status. In other words, the assessment never concerns a plant or ingredient in general terms, but a specific material obtained through a specific process and intended for specific conditions of use.
Why does manufacturing quality matter in the safety assessment?
A robust safety assessment also depends on the consistency of the production process. Manufacturing quality ensures that the ingredient placed on the market is standardized, reproducible, and representative of the material on which the assessment is based.
In this context, the adoption of GMP-like approaches can serve as a relevant example of good-quality practice in manufacturing, especially where process control, batch-to-batch consistency, traceability, and specification management are critical to supporting the overall reliability of the product.
For this reason, ingredient safety starts with accurate and thorough characterization. At the same time, the validity of the safety assessment depends on the quality of the manufacturing process, because production is what guarantees product standardization over time. Without that foundation, even a technically complete assessment may lose both scientific strength and regulatory relevance.
