Sacha inchi is a climbing shrub native to South America that produces star-shaped seed pods packed with some of the highest concentrations of plant-based omega-3 fats found in nature. The seeds contain roughly 25 grams of protein, 50 grams of fat, and 24 grams of fiber per 100-gram serving, making them one of the most nutrient-dense seeds available. You’ll find them sold roasted, as a pressed oil, or ground into protein powder.
The Plant and Where It Grows
Sacha inchi belongs to the Euphorbiaceae family, the same plant family as castor and rubber trees. Its scientific name is Plukenetia volubilis, though you may also see it called “Inca peanut,” “jungle peanut,” or “mountain peanut.” Despite those nicknames, it is not botanically related to peanuts. The plant is a woody vine native to the windward islands and southern tropical regions of South America, with Peru being the most well-known growing region. It thrives in tropical climates and has been cultivated by indigenous communities for centuries.
The plant produces distinctive green, star-shaped pods with four to seven pointed lobes. Each lobe contains a single dark brown seed about the size of a hazelnut. These seeds are the edible part, though the leaves have also been used in traditional preparations.
Nutritional Profile
Sacha inchi seeds stand out for three reasons: unusually high omega-3 content, complete protein with all essential amino acids, and substantial fiber. In roasted form, a 100-gram serving delivers about 25.5 grams of protein, nearly 50 grams of fat, and roughly 24 grams of fiber.
The fat composition is where sacha inchi really separates itself from other seeds. Around 77 to 84% of the total fat is polyunsaturated, with alpha-linolenic acid (the plant form of omega-3) making up 35 to 51% of total fatty acids. Linoleic acid, an omega-6 fat, accounts for another 33 to 41%. That omega-3 concentration rivals flaxseed and far exceeds what you’d get from chia, hemp, or walnuts.
Protein Quality Compared to Other Plants
Sacha inchi protein is rich in tryptophan, phenylalanine, threonine, isoleucine, and histidine. It contains all nine essential amino acids, though leucine and lysine fall slightly below the thresholds recommended by the Food and Agriculture Organization. This makes it a strong but not perfect protein on its own, similar to most plant sources.
When the seeds are defatted and ground into flour, the protein content reaches about 57%, which is higher than defatted chia flour (around 35%), hemp flour (33%), or amaranth flour (16%), and comparable to defatted soybean meal. Protein digestibility in the whole seed form sits around 50%, but processing the seeds into hydrolyzed powder pushes digestibility close to 100%. If you’re using sacha inchi primarily for protein, the powder form is significantly more bioavailable than eating whole roasted seeds.
Effects on Cholesterol and Blood Pressure
A randomized, double-blind clinical trial tested sacha inchi oil supplementation in 54 patients with high blood sugar, high blood pressure, and elevated cholesterol. Participants took 1,000 milligrams of sacha inchi oil daily for 12 weeks while continuing their regular medications. The group taking sacha inchi oil saw their systolic blood pressure drop by an average of 8.6 mmHg (from about 144 to 135), a statistically significant change. Their LDL (“bad”) cholesterol also decreased, and there was a modest improvement in HDL (“good”) cholesterol.
These results are promising but come from a small, preliminary trial. The blood pressure reduction is meaningful in clinical terms, roughly equivalent to what some people achieve with lifestyle changes like reducing sodium intake. Larger studies are needed to confirm the effects, but the results align with what you’d expect from a food this high in omega-3 fats.
Why Raw Seeds Are Unsafe
Raw sacha inchi seeds contain alkaloids, lectins, and saponins that can cause mild to severe toxicity. Lab research has shown that raw seed extracts cause damage to liver cells. Roasting significantly reduces the concentration of these compounds, which is why all commercially sold sacha inchi seeds are heat-treated before packaging. You should never eat sacha inchi seeds raw. Roasting at high temperatures (around 160°C for six minutes in commercial processing) breaks down the harmful compounds and makes the seeds safe.
The oil, which is cold-pressed from the seeds, does not carry the same concern because the toxic compounds are water-soluble and remain in the seed cake after pressing.
Allergies and Cross-Reactivity
Sacha inchi is a seed, not a nut or legume, and it is not botanically related to peanuts despite the “Inca peanut” nickname. The American Academy of Allergy, Asthma, and Immunology notes that no cross-reactivity with peanut would be expected, and preliminary (unpublished) testing from Peru supports this. There are no published reports of allergic reactions to sacha inchi, though undocumented cases exist. If you have a severe peanut or tree nut allergy, it’s worth discussing with an allergist before trying it, but the botanical distance makes a reaction unlikely.
How People Use It
Sacha inchi is available in several forms, each suited to different uses. Roasted seeds have a mild, slightly nutty flavor and can be eaten as a snack or added to salads and trail mixes. The texture is lighter and crunchier than most tree nuts. Sacha inchi oil has a grassy, slightly bitter taste and works well drizzled over finished dishes, though its high polyunsaturated fat content means it breaks down at high heat and should not be used for frying. Protein powder made from the defatted seeds blends into smoothies and baked goods and is popular among people avoiding soy or dairy-based protein supplements.
The oil is also used topically in skincare products, where its high omega-3 and omega-6 content is marketed for moisturizing and anti-inflammatory benefits, though clinical evidence for skin applications is limited compared to the dietary research.