As food and supplement brands increasingly market themselves on their natural credentials, a quiet tension sits at the heart of the functional food category. Consumers reaching for a product labelled clean, natural, or food-based may not realise that the vitamins and minerals inside were synthesised from petrochemicals in a factory - not grown in a field.
The gap between consumer expectation and formulation reality is widening. And for food brands, understanding that gap - and how to close it - has become a commercial imperative, not just an ethical one.
What Is a Functional Food - and Why Does Fortification Exist?
The term functional food encompasses foods and drinks that provide health benefits extending beyond basic nutrition. That includes naturally nutrient-rich whole foods like fruits, vegetables, and nuts, as well as fortified or modified products - breakfast cereals, plant-based milks, meal replacement shakes - containing additional bioactive components such as vitamins, minerals, antioxidants, prebiotics, or probiotics.
Both are functional. But the source and form of the added nutrients vary significantly, and that distinction has real implications for labelling, consumer trust, and brand positioning.
Food fortification - the deliberate addition of micronutrients to a food product - has been around for over a century. The World Health Organisation defines it as the practice of deliberately increasing the content of an essential micronutrient in a food to improve the nutritional quality of the food supply and to provide a public health benefit with minimal risk to health. It first emerged in the 1920s in the United States as a strategy to address widespread malnutrition - iodine added to salt to combat goitre, Vitamin D added to milk to prevent rickets, iron and B vitamins added to bread and flour to reduce deficiency diseases.
In the UK today, fortification of flour remains mandatory. Calcium, iron, Vitamin B1 (thiamine), and Vitamin B3 (niacin) must be present in specified amounts in all white and brown flour. More recently, folic acid has been added to the list, following years of campaigning over its role in preventing neural tube defects. These are public health measures, not marketing decisions.
But the fortification landscape has expanded dramatically. Brands now add vitamins and minerals for a range of commercial reasons: to achieve the 15% reference intake threshold required to make a health claim on pack, to replace nutrients lost during heat processing, to match the nutritional profile of the animal-based product they are replacing, or to meet the specific needs of target consumer groups such as vegans, athletes, or older adults.
The question that rarely gets asked on the label is: where are those added vitamins actually coming from?
How Synthetic Vitamins Are Made
Most vitamins added to food and supplements today are synthetic. They are manufactured by one of two methods: chemical synthesis from petrochemical or coal tar derivatives, or biochemical production via microbial fermentation.
The chemical synthesis route uses petroleum-derived precursors or coal tar as starting materials. These are processed through multi-step reactions to produce isolated vitamin compounds - ascorbic acid (Vitamin C), retinyl acetate (Vitamin A), cyanocobalamin (B12), and others. The ascorbic acid production process alone involves six or more chemical steps from glucose, often using solvents and chemical catalysts, before the purified compound is isolated, dried, and packaged.
The fermentation route uses bacteria or yeast to produce vitamin compounds through biological processes. Riboflavin (B2), certain forms of B12, and biotin are commonly produced this way. While fermentation sounds more natural, the organisms are often genetically modified, the process takes place in industrial bioreactors, and the resulting compound is still an isolated, highly purified chemical rather than a nutrient embedded within a food matrix.
In both cases, the end product is a standardised chemical compound with a defined nutrient concentration. It is not a food. It does not carry the co-factors, phytonutrients, or food matrix that would accompany the same nutrient if it arrived via a real ingredient.
The Simplest Way to Tell: Check the Ingredient List
The clearest signal of synthetic fortification is the ingredient list. Because synthetic vitamins are regulated as discrete nutrient substances, they appear on pack either as the nutrient name alone - Vitamin C, Vitamin D, Vitamin B12 - or by chemical name: ascorbic acid, cholecalciferol, cyanocobalamin, folic acid, dl-alpha-tocopherol, retinyl acetate.
Naturally derived vitamins and minerals work differently. Because they are supplied by a food ingredient rather than an isolated chemical, that food ingredient appears on the label. Your ingredient list reads: acerola cherry extract, shiitake mushroom powder, curry leaf extract, lichen extract, algae powder, moringa leaf, lemon peel. The vitamin is present in the ingredient - it is the ingredient that is disclosed.
This distinction requires no specialist knowledge. A consumer picking up two products side by side can see, within seconds, which one is fortified with food and which is fortified with chemistry.
“83% of European consumers say it is important to know whether the vitamins in their food products are natural or synthetic. In the UK, there is currently no requirement to disclose this on the label - a product can just say Vitamin D, and you have no way of knowing whether it came from lichen or from a petrochemical process. That gap between consumer expectation and what the label actually tells you is exactly the problem we are trying to address.” - Eimear Sutton, RNutr MSc - Head of Nutrition, BIOVIT
What Consumers Actually Expect
Consumer preference for natural sourcing is not a niche trend. It is the mainstream expectation. Independent research conducted for BIOVIT by Vypr found that 92% of UK consumers would prefer the vitamins and minerals added to their food products to be natural. 73% expect everyday products to contain only natural vitamins and minerals. 60% say they would be willing to pay more for products fortified with natural rather than synthetic vitamins.
92% of UK consumers would prefer vitamins and minerals in their food to be natural-Vypr consumer survey, Oct 2025
A separate survey of 5,000 European consumers conducted by Safe Food Advocacy Europe (SAFE) in November 2024 found that 86% of respondents were more likely to buy a product labelled as containing natural ingredients. Around 69% ranked natural ingredients above nutritional values and country of origin as a purchase driver.
Critically, consumers are not opposed to synthetically derived ingredients when they are present. What they consistently say they want is transparency - an honest label that tells them what is in the product and how it was made.
“The market share for synthetically derived vitamins remains quite large despite consumer scepticism. This confirms that consumers are not opposed to synthetic vitamins as such - they simply want transparency about what is in the product and how it was obtained. That transparency is currently lacking, both in the EU and in the UK. Companies that want to be transparent can act right now without waiting for regulation. Simply disclose how the product was obtained and whether synthetic ingredients are present. Simple, direct, honest. That is what consumers are asking for.” - Antonio, Project and Policy Officer - Safe Food Advocacy Europe (SAFE), speaking at BIOVIT Live
Where Does Regulation Stand?
The word natural has no legally binding definition in UK or EU food law as applied to general product characteristics. Brands can use it freely on pack - and many do - without any requirement to substantiate what it means in their specific context. This creates real ambiguity for consumers and a competitive disadvantage for brands doing things properly.
Several EU regulations touch on the concept without resolving it. The Nutrition and Health Claims Regulation allows naturally qualifiers only in very specific nutrient contexts - naturally low in salt, for example - but not for broader claims about origin or processing. The Flavourings Regulation defines natural flavouring substances in the context of flavour ingredients. The REACH Regulation references substances occurring in nature but applies to chemicals, not finished foods.
Organic certification currently provides the clearest regulatory boundary. Organic standards prohibit the use of most synthetic vitamins and minerals, which means that organic-certified products come with a meaningful, independently verified guarantee about the source of fortification. For brands seeking a definitive signal to consumers, organic certification is currently the most credible route available.
SAFE and other industry bodies are actively lobbying for a broader, legally binding definition of natural in food labelling, and for mandatory disclosure of whether vitamins and minerals in a product are naturally or synthetically derived. Greenwashing regulation is also tightening across the EU, with greater scrutiny of environmental and natural claims that cannot be substantiated. The regulatory landscape is moving - and brands that have built genuine natural credentials now are better placed for where it is heading.
Does Natural Mean Less Effective?
The most common objection from formulators is whether naturally derived vitamins actually work as well as synthetic ones. The clinical evidence is clear: they do.
BIOVIT's own peer-reviewed human intervention trial - conducted at Swansea University with 61 volunteers over 30 days and published in Current Developments in Nutrition - measured eight blood biomarkers across participants supplementing with organically sourced versus synthetic vitamins and minerals. The results showed equivalent bioavailability across all markers. Natural fortification does not require a trade-off in efficacy.
The practical advantage of natural sourcing lies not in outperforming synthetic nutrients, but in delivering the same nutritional outcome while also delivering the label transparency, brand integrity, and consumer preference that synthetic sources cannot.
Where Clean Label Meets Functional Nutrition
For years, clean label and functional nutrition existed in tension. Adding vitamins meant adding chemical-sounding ingredients that undermined the clean-label story. Brands had to choose.
Natural fortification resolves that conflict. It enables food and supplement brands to deliver measurable vitamins and minerals - complete with verified EFSA health claims - while maintaining an ingredient list that reads like food, not a chemical inventory. The nutrient is real. The source is transparent. The label supports the brand rather than working against it.
This convergence is increasingly visible across beverages, snack bars, powders, supplements, and fortified dairy alternatives. Natural functionality is becoming a core feature of the clean-label movement, not an exception to it.
The BIOVIT Trust Mark - developed in partnership with Swansea University and validated through independent consumer research by Kaleidoscope - provides on-pack verification of natural vitamin and mineral content. Brands carrying the Trust Mark saw a 27% increase in consumer willingness to buy, an 18% uplift in liking score, and a demonstrated ability to command a price premium, at approximately 1% additional cost of goods.
What This Means for Your Brand
The functional food market is increasingly crowded. Consumer trust is increasingly scarce. And regulatory scrutiny of natural claims is increasing year on year.
Brands that have genuinely built natural credentials - in formulation, in certification, and in label transparency - are building something that cannot be replicated by a rebrand. The ingredient list is either honest or it is not. The source is either traceable or it is not.
For brands still formulating with synthetic vitamins: the switch is more achievable than it might appear. Natural equivalents exist for a full range of vitamins and minerals. Processing stability data is available. EFSA health claims transfer across with equivalent wording. The formulation challenge is real but solvable - and the commercial case for making the change is stronger every year.
Ready to Make the Switch to Natural?
BIOVIT supplies 100% natural, organically certified vitamins and minerals derived from plants, algae, and fungi. Request a sample, book a formulation call, or download our ingredient specification sheets.
Request a Sample - biovit.com
