What does "% NRV" on a supplement label actually mean?
Every supplement sold in the UK is required to show a nutritional information panel. Next to each vitamin or mineral, you will see a number followed by "% NRV" — for example, "Vitamin D 10µg (200% NRV)" or "Iron 14mg (100% NRV)."
Most people glance at these numbers and assume that 100% means they are getting everything they need, and anything above 100% is excessive. Both assumptions are wrong. Understanding what NRV actually represents — and what it does not — is essential for making informed decisions about supplementation.
What is NRV?
NRV stands for Nutrient Reference Values. These are the daily reference intake amounts for vitamins and minerals used specifically for food labelling purposes across the UK and EU.
NRVs are defined in EU Regulation 1169/2011 (Annex XIII), which is retained in UK law following Brexit. They provide a single reference number for each nutrient so that manufacturers can express the vitamin and mineral content of their products as a percentage of a standardised daily value.
The term "NRV" replaced the older label term "RDA" (Recommended Daily Allowance) in 2014 when EU Regulation 1169/2011 came into full effect. If you remember seeing "% RDA" on supplement labels before 2014, NRV is its direct replacement — though the numbers behind it changed for some nutrients.
NRVs serve one specific purpose: to give consumers a consistent benchmark when comparing products. They are not personalised dietary recommendations.
How does NRV differ from RDA, RNI, and DRV?
This is where most people — and many supplement brands — get confused. There are several sets of reference values in use across the UK, and they mean different things.
NRV — Nutrient Reference Values
- Set by: EU legislation (Regulation 1169/2011), retained in UK law
- Purpose: Food and supplement labelling
- What it is: A single reference value per nutrient for the entire adult population
- Used on: Product labels (the "% NRV" you see on packaging)
RDA — Recommended Daily Allowance
- Set by: Previously used in EU labelling (replaced by NRV in 2014)
- Purpose: The old labelling term
- What it is: Functionally the same concept as NRV — a labelling reference value. The term is still widely used colloquially, but it no longer appears on UK/EU product labels
RNI — Reference Nutrient Intake
- Set by: The UK Scientific Advisory Committee on Nutrition (SACN) and previously the Committee on Medical Aspects of Food and Nutrition Policy (COMA)
- Purpose: Dietary recommendations for the UK population
- What it is: The amount of a nutrient that is sufficient to meet the needs of 97.5% of the population within a specific age and sex group
- Key difference from NRV: RNIs are broken down by age, sex, and life stage. NRV is a single number for all adults
DRV — Dietary Reference Values
- Set by: SACN (UK) and EFSA (EU)
- Purpose: Umbrella term for a set of dietary reference values
- What it includes: Several values — the Lower Reference Nutrient Intake (LRNI, meeting the needs of only 2.5% of the population), the Estimated Average Requirement (EAR, meeting the needs of 50%), and the RNI (meeting the needs of 97.5%)
The critical point is that NRV and RNI are not the same numbers for many nutrients. NRV is a labelling convenience. RNI is a dietary recommendation tailored to specific population groups. When a supplement label says "100% NRV," it does not necessarily mean you are meeting the RNI for your age and sex.
Full NRV table: vitamins and minerals
The following table lists all vitamins and minerals with their NRV as defined in Annex XIII of EU Regulation 1169/2011. These are the values used on all UK and EU food and supplement labels.
Vitamins
| Nutrient | NRV | Unit |
|---|---|---|
| Vitamin A | 800 | µg |
| Vitamin D | 5 | µg |
| Vitamin E | 12 | mg |
| Vitamin C | 80 | mg |
| Thiamin (vitamin B1) | 1.1 | mg |
| Riboflavin (vitamin B2) | 1.4 | mg |
| Niacin (vitamin B3) | 16 | mg |
| Vitamin B6 | 1.4 | mg |
| Folic acid | 200 | µg |
| Vitamin B12 | 2.5 | µg |
| Biotin | 50 | µg |
| Pantothenic acid (vitamin B5) | 6 | mg |
| Vitamin K | 75 | µg |
Minerals
| Nutrient | NRV | Unit |
|---|---|---|
| Potassium | 2,000 | mg |
| Chloride | 800 | mg |
| Calcium | 800 | mg |
| Phosphorus | 700 | mg |
| Magnesium | 375 | mg |
| Iron | 14 | mg |
| Zinc | 10 | mg |
| Copper | 1 | mg |
| Manganese | 2 | mg |
| Fluoride | 3.5 | mg |
| Selenium | 55 | µg |
| Chromium | 40 | µg |
| Molybdenum | 50 | µg |
| Iodine | 150 | µg |
These values have not changed since the regulation came into effect. They apply uniformly to all adults regardless of age, sex, body weight, or health status — which is both their strength (simplicity, comparability) and their limitation.
Why NRV is not the whole picture
NRV was designed to make labels easy to read. It was never intended to tell you how much of a nutrient you specifically need. Here is why that distinction matters.
NRV is a single number for a diverse population
The NRV for iron is 14mg. But UK dietary recommendations (RNIs set by SACN) tell a more nuanced story:
- Men aged 19+: 8.7mg per day
- Women aged 19–49: 14.8mg per day
- Women aged 50+: 8.7mg per day
A man and a premenopausal woman have very different iron requirements, yet both see the same "% NRV" on the same label. For women with heavy menstrual periods, even the RNI may be insufficient. Read more about iron forms and absorption.
NRV can understate what you need
The NRV for vitamin D is 5µg (200 IU). But SACN's Vitamin D and Health report (2016) set the UK RNI at 10µg (400 IU) — double the NRV. A supplement providing "100% NRV" of vitamin D gives you only half of what SACN recommends.
This is not a minor discrepancy. Vitamin D deficiency is well-documented across the UK population, with Cashman et al. (2016) finding that approximately 13% of over 55,000 Europeans had serum 25(OH)D concentrations below the deficiency threshold, rising to 17.7% during winter. The NRV figure dates from earlier EU harmonisation efforts and has not been updated to reflect current evidence. For more on vitamin D, see our guide to D3 vs D2.
NRV does not account for diet type
If you follow a vegan or vegetarian diet, your requirements for certain nutrients may differ from someone eating a mixed diet. Vitamin B12 is found naturally only in animal-derived foods, so plant-based eaters are entirely dependent on fortified foods or supplementation. The NRV of 2.5µg does not distinguish between someone who eats meat daily and someone who eats none.
Similarly, the bioavailability of iron and zinc from plant sources is lower than from animal sources due to phytate inhibition — meaning vegans and vegetarians may need higher intakes to achieve the same functional status.
NRV ignores body weight, activity level, and life stage
A 55kg sedentary woman and a 95kg male athlete have meaningfully different nutritional requirements. Pregnancy, breastfeeding, and ageing all shift requirements further. NRV captures none of this variation.
Can you take more than 100% NRV?
Yes. For most nutrients, intakes above 100% NRV are safe and sometimes appropriate.
The NRV is a labelling reference value, not a safety limit. The relevant safety boundaries are the Tolerable Upper Intake Levels (ULs) set by the European Food Safety Authority (EFSA) and the Safe Upper Levels (SULs) or Guidance Levels set by the UK Expert Group on Vitamins and Minerals (EVM). These represent the maximum daily intake unlikely to cause adverse effects over a lifetime.
Nutrients with wide safety margins above NRV
- Vitamin C: NRV is 80mg. The EVM guidance level is 1,000mg per day from supplements. Many people safely take several times the NRV
- B vitamins (B1, B2, B5, B12): Water-soluble vitamins with generally wide safety margins. Excess is excreted in urine. Vitamin B6 is the exception — EFSA set the UL at 12.5mg per day (approximately 9 times NRV)
- Vitamin D: NRV is 5µg. EFSA UL is 100µg per day (20 times NRV). SACN recommends 10µg (double NRV) as a baseline for all adults
- Magnesium: NRV is 375mg. The EVM guidance level for supplemental magnesium is 400mg per day (in addition to dietary intake). Read more about magnesium and sleep
Nutrients where caution is needed above NRV
- Vitamin A (retinol): NRV is 800µg. The EVM SUL is 1,500µg per day from supplements. Excessive vitamin A intake has been associated with adverse effects including liver toxicity and, during pregnancy, birth defects. Beta-carotene (provitamin A from plant sources) does not carry the same risk
- Iron: NRV is 14mg. EFSA set the UL at 40mg per day for adults (2024 assessment). Excess iron cannot be actively excreted and accumulates in tissue. Supplementation above NRV should be guided by need
- Selenium: NRV is 55µg. The EVM SUL is 350µg per day including dietary intake. The margin between a beneficial and a harmful dose is narrower than for most nutrients
- Zinc: NRV is 10mg. The EVM SUL is 25mg per day from supplements. Long-term high-dose zinc supplementation can impair copper absorption
The key takeaway: exceeding 100% NRV is not inherently dangerous, but the appropriate amount depends on the nutrient, the form, and your individual circumstances. A blanket rule of "just take 100% of everything" is neither optimal nor what the science supports.
How PARTICULAR uses NRV in personalised dosing
Most supplement brands formulate to round NRV percentages — 100% NRV of this, 200% NRV of that — because it looks clean on a label. This is a marketing decision, not a scientific one.
PARTICULAR takes a different approach. The scoring engine behind every personalised formulation does not simply target NRV. It considers:
- Your dietary intake — estimated from your questionnaire responses, so the supplement complements what you already eat rather than duplicating it
- Body weight — nutrient requirements scale with body mass for many vitamins and minerals
- Sex and life stage — using UK RNI values broken down by age and sex, not the single NRV figure
- Lifestyle factors — including activity level, sleep patterns, and stress, which influence requirements for specific nutrients like magnesium and B vitamins
- UK regulatory upper limits — every dose is capped below the relevant EVM Safe Upper Level or EFSA Tolerable Upper Intake Level, regardless of what the algorithm calculates
The result is that your vitamin D3 dose might be 200% NRV (10µg, matching the SACN RNI) while your vitamin B12 might be 400% NRV — because you follow a vegan diet and have no dietary source of B12. Someone else taking PARTICULAR might receive different amounts of each nutrient based on their biology and lifestyle.
This is delivered as loose vegan microgranules in a pouch — one daily scoop. Each nutrient is individually coated, so nutrients that compete for absorption (like iron and calcium, or iron and zinc) are released at different points in the gut. The format makes personalised dosing practical in a way that fixed-dose capsules or tablets cannot replicate.
Your "% NRV" column on the label is there because the law requires it. But the dose itself is determined by something more useful than a single number designed for a label.
Key takeaways
- NRV stands for Nutrient Reference Values — daily reference intakes for vitamins and minerals defined in EU Regulation 1169/2011, retained in UK law, and used on all food and supplement labels
- NRV replaced the term RDA on labels in 2014, but the concept is the same — a single reference value for labelling purposes
- NRV is not the same as RNI — the UK Reference Nutrient Intake set by SACN is a dietary recommendation broken down by age and sex. NRV is a labelling tool. The numbers differ for several nutrients
- 100% NRV does not mean you are meeting your needs — the NRV for vitamin D is 5µg, but SACN recommends 10µg for all adults. Iron requirements vary by sex and menstrual status far beyond what a single NRV captures
- Taking more than 100% NRV is safe for most nutrients — the relevant safety limits are EFSA Tolerable Upper Intake Levels and UK EVM Safe Upper Levels, which are set well above NRV for most vitamins and minerals
- A personalised approach is more appropriate than targeting round NRV percentages — PARTICULAR's scoring engine uses UK RNI values, dietary intake estimates, body weight, and regulatory upper limits to calculate a dose tailored to your biology, not a label convention
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