Hazelnuts matter both to people who eat them every day and to those who use them as an ingredient in bars, spreads, and bakery products. The key point is simple: hazelnuts are energy-dense, rich in fats that are largely unsaturated, and they also provide fibre, vitamin E, and useful minerals—along with a few practical considerations around portion size, roasting, and label claims.
What are the main nutrients in hazelnuts and what do they do (macronutrients and fibre)
Most of the energy in hazelnuts comes from fat, which makes them a very effective “high-energy” ingredient in product formulation. For technical sheets and B2B specs, it’s best to start from official average values and then manage batch-to-batch variability.
Average values per 100 g (dried hazelnuts, unsalted)
| Nutrient | Average value |
|---|---|
| Energy | ~628 kcal |
| Fat | ~60.8 g |
| Carbohydrates | ~16.7 g |
| Protein | ~15.0 g |
| Fibre | ~9.7 g |
Source: whatyoueat.io (hazelnuts, dried, without salt).
Why they matter in practice (B2C and B2B)
- High-calorie-density ingredient: in bars, spreads, bakery, and gelato it helps build body and perceived satiety, and it “carries” flavour and texture. From an industrial perspective, energy density also affects cost per serving and how you set up the nutrition declaration.
- “Source of energy” messaging: this is a communication area that needs careful handling. On-pack, you work with declared nutrients and values, without turning “energy” into a promise of performance or non-permitted benefits.
Fibre: not just nutrition, also functionality
Fibre is about ~9.7 g/100 g (average). In finished products it can be leveraged both nutritionally and functionally:
- Texture: more “crunch” and structure in inclusions (chopped pieces).
- Moisture management: in inclusions it can help limit the “softening” effect over time, although real-world performance depends on the matrix, fat content, and water activity.
- Nutrition claims: in the EU, you can use “source of fibre” if the finished product has ≥3 g/100 g, and “high fibre” if it has ≥6 g/100 g. The practical rule is simple: it’s calculated on the final recipe, not on the ingredient alone.
“Per industrial serving” interpretation (useful in R&D)
A typical snack or bar portion, 20–30 g, provides roughly:
- Protein: ~3–4.5 g
- Fibre: ~1.9–2.9 g
These figures help you hit macro targets and understand how much “space” remains for other ingredients (added proteins, functional fibres, cocoa, cereals).
Batch/origin variability: why it’s not a detail
Composition can shift with cultivar, harvest year, residual moisture, and degree of skin removal. One often underestimated point is the skin: it can influence phenolic content in particular, and therefore sensory consistency and “perceived nutritional quality” in production. Source: MDPI review (Agriculture 10(2):36).
In the language of people searching for hazelnuts health nutritional properties, this translates as: the nutrients are “stable” as a concept, but not identical to the gram from one batch to another.
Monounsaturated and polyunsaturated fats in hazelnuts: why they matter for health
The simplest thing to remember is this: per 100 g of hazelnuts, a large share of calories comes from fat (about 60.8 g/100 g). What’s interesting is fat quality: hazelnuts are dominated by monounsaturated fats (MUFA, mainly oleic acid) and also contain polyunsaturated fats (PUFA, mainly linoleic acid). This profile is generally considered more favourable than ingredients where saturated fats dominate. Source: whatyoueat.io (general nutrition profile).
B2B perspective: MUFA/PUFA and oxidative stability
A higher-oleic profile can help, but shelf-life in spreads, gianduja-style products (a classic Italian hazelnut-and-chocolate confection), and pralines depends above all on oxidation control. If you’re in buying or R&D, it makes sense to ask suppliers for clear KPIs to reduce rancidity risk:
- peroxide value
- anisidine value
- free acidity
- fatty acid profile
- tocopherols
Source: ACS study (Journal of Agricultural and Food Chemistry) on process effects and lipid quality.
Process and formulation: “good fat” isn’t enough on its own
Real stability also depends on:
- emulsions with cocoa/milk and management of the fat phase
- oxygen control (including protective atmosphere, where applicable)
- barrier packaging against oxygen and light
- storage temperatures and stock rotation (FIFO)
Roasting and fats: what really changes
Roasting tends to change the overall fatty-acid profile only slightly. Under more intense conditions, modest shifts in relative percentages are observed, such as a slight relative increase in oleic and a decrease in linoleic. Practical implication: you can pursue aroma within a well-defined roasting window without “overturning” the lipid profile, while avoiding extremes that worsen stability and sensory notes. Source: ACS (JF052287v).
Buyer questions (mini-checklist)
- Whole vs chopped vs paste: more exposed surface area generally means higher oxidative risk.
- Particle size: define ranges and tolerances, because they affect oxidation and sensory yield.
- Residual oxygen and logistics: ask about packing and transport conditions, and specify temperature and timing.
Within the “hazelnuts health nutritional properties” framework, this is the bridge between health and industry: the fat profile is attractive, but it must be protected through process and specifications.
Vitamin E and antioxidants in hazelnuts: what they are and how they protect cells
Vitamin E is one of the easiest strengths to communicate—if you follow the rules. The guiding figure is: vitamin E (α-tocopherol) ~15.0 mg/100 g. Source: selfmadehealth.com (NDB entry).
How to read the number (EU NRV)
The EU NRV for vitamin E is 12 mg. So 100 g of hazelnuts, on average, exceed that value. For marketing and R&D, this helps estimate %NRV per serving, but always calculated on the finished product and the declared serving size.
Health claims: what you can say in the EU (compliantly)
In the EU there is an authorised claim: vitamin E contributes to the protection of DNA, proteins and lipids from oxidative stress. However, you can only use it if the finished product is at least a “source of vitamin E” under the applicable criteria. Source: EFSA (scientific opinion linked to claims) and the EU regulatory framework for claims.
Polyphenols and the skin: the factor that changes everything
Beyond vitamin E, hazelnuts contain phenolic compounds. The practical point is: the skin/pellicle is much richer in polyphenols than the kernel alone. In production, choosing hazelnuts or chopped pieces with skin can increase the phenolic component available in the inclusion. Source: MDPI (Agriculture 10(2):36).
Quality vs claims (B2B)
More antioxidants do not automatically mean a “claim”. But they can support premium positioning and credible technical storytelling: origin, degree of skin removal, gentler roasting, oxygen management.
Roasting: possible increases in some indicators, but watch skin removal
Roasting can increase some antioxidant indicators (also due to release of bound phenolics and formation of Maillard products). But if the skin is removed after roasting, total polyphenols available in the final product can drop significantly. Source: MDPI (Agriculture 10(2):36).
Minerals in hazelnuts (magnesium, copper, manganese, potassium): benefits and deficiency signals
Minerals are another pillar when discussing the nutritional properties of hazelnuts, especially for those developing “functional” snacks while staying within EU claim boundaries.
Average values per 100 g (useful for technical sheets)
- Magnesium: ~163 mg
- Potassium: ~680 mg
- Copper: ~1.7 mg
- Manganese: ~6.2 mg
Source: whatyoueat.io.
In supplier specifications it’s prudent to work with acceptance ranges and batch checks, because varieties and post-harvest conditions can shift values.
EU NRVs and “significant amount” on labels
EU NRVs (labelling references):
- copper 1 mg
- manganese 2 mg
- magnesium 375 mg
- potassium 2000 mg
For solid foods, an amount is considered significant if it reaches 15% NRV per 100 g. This criterion guides the use of nutrition claims such as “source of”. Source: Reg. (EU) 1169/2011 (Eur-Lex) and the Commission page on nutrition & health claims.
Benefits in plain language (without overclaiming)
- Magnesium: involved in muscle and nervous system function.
- Potassium:
- Copper and manganese: enzyme cofactors, also linked to oxidative metabolism processes.
For specific claims, always refer to the applicable EU list and conditions of use on the finished product.
Deficiency signals (educational, but accurate)
- Magnesium: cramps, fatigue (non-specific).
- Potassium: weakness; in severe cases arrhythmias may occur.
- Copper: anaemia and altered immune function.
- Manganese: deficiency is rare; possible bone/metabolic issues.
Note
Industrial angle: phytates and bioavailability
Phytates can influence the absorption of some minerals. Process and formulation matter: heat treatments and the matrix (cocoa, added fibres) can partly affect bioavailability. In communication, it’s better to avoid promises like “guaranteed absorption”. Source: vitalibrary.com (nutrition overview and antinutritional factors).
Raw or roasted hazelnuts: what changes in nutritional properties and how to choose based on use
Choosing between raw and roasted is first and foremost a choice of flavour, process, and application. Nutrition and stability come right after.
Raw: when they make sense
- A more “intact” profile and greener, more vegetal notes.
- Useful when you want to control roasting in-house or use gentle processes.
- Interesting for 100% pastes where a less intense aromatic profile is desired.
Roasted: when they’re the better option
- More intense aroma and warmer colour, useful in pralines, spreads, and bakery.
- Lower perceived moisture and greater immediate “crispness”, useful in inclusions and cereals.
- Easier to standardise the sensory profile, if parameters are well defined.
Vitamin E and roasting: losses are often limited, but depend on conditions
Many studies report limited tocopherol losses under controlled conditions. In some cases, reductions on the order of about ~10% for vitamin E are observed, while other work indicates high stability (very high recovery of total tocopherols), depending on time, temperature, and the presence of shell/skin. Operational translation: define a roasting profile and verify with analytical controls. Source: ACS (JF052287v).
Fats and roasting: similar profile, but watch heavy roasting
The fatty-acid profile changes little, but with more intense roasting the relative share of linoleic can decrease. Impact: potential effects on oxidative stability and on how you set up “rich in unsaturated fats” communication on the finished product, where applicable. Source: ACS (JF052287v).
Polyphenols and the skin: the skin-removal trade-off
The skin is a concentrated source of phenolics. If it is removed after roasting for colour or sensory reasons, part of it is lost
Checklist for buyers and processors
- Roasting degree: specify colour (Lab*) and tolerances.
- Water activity: define targets for crispness and stability.
- Defects: burnt, smoky, out-of-target bitter notes.
- Oxidative parameters of the oil: peroxides, anisidine, free acidity.
- Allergen management and rancidity risk along the supply chain: barrier packaging, temperature, FIFO, maximum times.
If the goal is to communicate hazelnuts health nutritional properties seriously, the practical rule is one: nutrition, process, and claims must speak the same language—and that language is the finished product label.