Pine Nuts: Nutrients, What Research Shows and Safety

Pine nuts are the edible seeds of certain pine trees (family Pinaceae), such as the stone pine (Pinus pinea) and the Korean pine (Pinus koraiensis). They are taken out of pine cones and shells, and are small, soft and creamy. People use them in pesto, salads and baking and often eat them for their healthy fats and minerals. This page separates pine nuts as a food from pine nut oil and from hype, and says plainly where the evidence is thin.

Read this first

• Pine nuts can cause allergic reactions, and the French Allergy-Vigilance Network lists pine nut among eleven plant foods behind most plant-related anaphylaxis cases it studied (2002 to 2024). For trouble breathing or swelling of the face or throat, call 911 (or your local emergency number). [11] See food allergy basics and emergency signs.
• "Pine mouth": some people get a bitter or metallic taste that starts 1 to 3 days after eating certain pine nuts and fades within about 2 weeks. It is unpleasant, not known to be dangerous, and the exact cause is not settled. [2][3][6]
• The CDC lists whole or chopped nuts and seeds as choking hazards for young children. [13]
• Honest summary: pine nuts are a mineral-rich, energy-dense food (USDA lists about 191 kcal in a 1 ounce portion). We did not find trials of whole pine nuts for heart disease, weight or blood sugar. Most "health benefit" claims come from pine nut oil studies or lab work.

What is in it (USDA values)

USDA data for dried pine nuts, shelled. The USDA household portion is 1 ounce (28.35 g), about 167 kernels. [1] The per-serving column is the USDA per-100 g value scaled to 28.35 g.

Source: USDA FoodData Central item 170591 (SR Legacy). [1] % Daily Value uses the FDA 2016 Daily Values; values vary with species, growing place, roasting and storage. USDA lists only 0.7 µg of selenium per 100 g, so pine nuts are not a selenium food. [1]

Pine nuts are mostly unsaturated fat: USDA lists 18.8 g monounsaturated and 34.1 g polyunsaturated fat per 100 g, against 4.9 g saturated. [1] The oil contains an unusual fatty acid called pinolenic acid; one small human trial used it (see below). [8] We did not read a source that measured other plant compounds in the whole nut, so we make no claim about them.

What research says

Eaten as food vs taken as oil or extract. The one human trial we read used capsules of hydrolyzed pine nut oil (6 g), not a handful of nuts, and it had only 9 people. [8] It does not show that eating pine nuts does the same. Observational studies of nut eating are not proof of cause and effect, and none we read were about pine nuts alone.

How much is a normal serving

The USDA household portion is 1 ounce (about 167 kernels, 28.35 g), which has about 191 kcal. [1] Other USDA portions are 1 cup (135 g) and 10 nuts (1.7 g). [1] The FDA qualified-health-claim list mentions 1.5 ounces a day for nuts in general, but we could not read the wording, so we do not quote it. [18] This is information, not a prescription. Pine nuts are energy dense, so a small handful goes a long way.

Safety, allergy and medicines

• Pine mouth (taste disturbance). French poison centers recorded 3,111 cases of persistent bitterness after pine nuts between 2008 and early 2010; the median time to onset was 24 hours and it lasted under 14 days in 95% of cases, with raw and cooked nuts both involved. [2] The US FDA received 501 consumer reports from 2008 to 2012. The taste began hours to days after eating and could last up to a few weeks, resolving without serious health consequences. The investigation found no clear medical cause and linked the problem with the species Pinus armandii. [3] A lab study of 16 complaint samples found P. armandii nuts in all of them, alone or mixed with P. koraiensis. The authors advised buying traditionally recognized species such as P. pinea, P. sibirica, P. koraiensis or P. gerardiana. [4] In a small trial, six volunteers ate 6 to 8 suspect nuts and all developed symptoms; four had the classic bitter, metallic taste 1 to 2 days later. [5] A case series of six patients found the taste always arose within 48 hours and went away within 14 days in all but one. [7] A 2012 review says the toxin has not been identified and the only treatment is to stop eating the nuts and wait. [6] Package labels often do not name the species, so you cannot always tell which nuts are involved.
• Allergy. Tree nut and seed allergies are often severe, usually start in childhood and may last for life. Co-sensitization among nuts is common, but clinical co-allergy is seen less often; the strongest overlaps reported are cashew-pistachio and walnut-pecan. [9] A pine nut allergen called Pin y 2 (a seed storage protein) has been identified and was stable to heat and acidity changes in lab tests. [10] In mice, sensitization to peanut, walnut and cashew cross-reacted with eight other tree nuts including pine nut, but this is animal research. [12] The NHS names tree nuts among common triggers and says call 999 for a swollen mouth or throat or trouble breathing; US readers should call 911. [14] The FDA says labels must name the specific type of tree nut in a product. [15] Whether pine nuts are treated as a tree nut for labels varies, so read each label; we did not find a source we read that settles this. See nut and seed allergy basics.
• Choking and young children. The CDC lists whole or chopped nuts and seeds, and spoonfuls of nut or seed butter, as foods to avoid for young children. [13] A 2026 case report describes a 16-month-old who aspirated a pine nut shell into an airway and needed bronchoscopy. [19] Ask a pediatrician before giving nuts to a child. See foods for babies and toddlers.
• Medicines. Proper evidence not found in the sources we read for a pine nut and medicine interaction. Pine nuts contain vitamin K (15 µg per ounce by USDA), which matters to people on warfarin, but we did not read a source on pine nuts and warfarin; ask a pharmacist. [1]
• Kidney disease. A 2025 systematic review of nuts in chronic kidney disease found only four studies, mostly on Brazil nuts and walnuts, all at moderate-to-high risk of bias; it did not cover pine nuts. [20] Pine nuts have 575 mg phosphorus and 597 mg potassium per 100 g by USDA. [1] People on renal diets should ask their kidney team.
• Calories. One ounce has about 191 kcal. [1] Weight-gain trials of nuts in general are mostly reassuring but mixed in detail. [17]
• Pregnancy. Proper evidence not found in the sources we read.

Choosing, storing and food safety

• MedlinePlus says aflatoxin (a mold toxin) can occur in nuts; it advises buying from major brands and discarding nuts that look moldy, discolored or shriveled. [16]
• Pine nuts are high in unsaturated fat. See storing nuts and seeds for rancidity; we did not read a pine-nut-specific storage source.
• If you have had pine mouth, note the brand and package label and stop using that batch. [6]

Related pages

• Nuts and seeds for heart health: what trials found
• Nut and seed allergy basics
• Storing nuts and seeds: rancidity, mold and aflatoxin
• Food allergy basics and emergency signs
• Foods for babies and toddlers: choking, honey and allergens
• Pili nuts