Pumpkin Seeds: Nutrition Facts, Health Benefits, and One of the Most Mineral-Dense Foods Available

Pumpkin seeds — also called pepitas when hulled — hold a genuinely extraordinary position in plant-based nutrition. The mineral figures alone are remarkable: 176% of daily phosphorus, 141% of daily magnesium, 71% of zinc, and 49% of iron per 100g. Combined with 29.8g of complete protein, 28% of niacin, 15% of Vitamin E, and a meaningful tryptophan content that has been specifically researched for sleep quality, pumpkin seeds are one of the most comprehensively mineral-dense small foods available from any source, plant or animal.

They also come with the same calorie density caveat as all seeds and nuts — at 574 kcal per 100g, the extraordinary mineral figures scale dramatically downward at realistic serving sizes. This page covers both the genuine nutritional excellence and the practical portion context.

Pumpkin Seeds Nutrition Facts (per 100g)

Pumpkin Seeds Nutrition Facts (per 28g serving — approximately 2 tablespoons)

A standard serving of pumpkin seeds is approximately 28g:

Even at a modest 28g serving, pumpkin seeds provide 39% of daily magnesium and 49% of daily phosphorus — extraordinary figures from a small snack portion.

Vitamins in Pumpkin Seeds (per 100g)

Standout: Pumpkin seeds’ niacin content (28% DV per 100g) is particularly meaningful given their high protein content — niacin is central to NAD production involved in amino acid catabolism and energy metabolism. Vitamin E at 15% DV provides antioxidant protection specifically suited to pumpkin seeds’ substantial polyunsaturated fat content. Thiamine at 16% DV and riboflavin at 12% DV round out a meaningful B vitamin spread.

Minerals in Pumpkin Seeds (per 100g)

Multiple extraordinary standouts: Pumpkin seeds’ mineral profile is among the most concentrated of any food in this collection. Phosphorus at 176% DV and magnesium at 141% DV both exceed the full daily requirement in 100g — figures that approach hemp seeds‘ remarkable mineral density. Zinc at 71% DV makes pumpkin seeds one of the most exceptional plant-based zinc sources available — particularly important given zinc’s role in testosterone production and immune function, and the difficulty of achieving adequate zinc from plant foods alone. Iron at 49% DV (non-haem form) provides a substantial contribution for plant-based eaters when paired with Vitamin C-rich foods. Potassium at 809mg per 100g is genuinely exceptional.

The Magnesium Story: 141% in One Food

Pumpkin seeds’ magnesium content rivals hemp seeds (175% DV) as one of the most concentrated whole-food magnesium sources available — and magnesium deserves specific attention because it’s both critically important and one of the most commonly under-consumed minerals in modern diets.

Magnesium is involved in over 300 enzymatic reactions — but the ones most directly relevant to active people include:

ATP production — every ATP molecule in the body must be bound to magnesium to be biologically active. Without adequate magnesium, cellular energy production is literally compromised regardless of calorie intake. This makes magnesium deficiency one of the most performance-impairing nutritional deficiencies possible for athletes.

Muscle contraction and relaxation — magnesium regulates calcium channel function in muscle cells, controlling both the contraction (calcium entry) and relaxation (calcium exit) phases. Inadequate magnesium disrupts this balance, contributing to muscle cramps, spasms, and difficulty with post-exercise relaxation.

Nervous system regulation — magnesium modulates NMDA receptor activity, regulates the HPA axis stress response, and has documented anxiolytic effects through its calming influence on neuronal excitability. This is why magnesium supplementation is widely associated with improved sleep quality and reduced anxiety.

Protein synthesis — magnesium is required for ribosome function — the cellular machinery that translates genetic code into protein. Without adequate magnesium, protein synthesis itself is impaired.

Insulin sensitivity — magnesium is a cofactor for insulin receptor activation, meaning adequate magnesium status directly improves the efficiency of glucose uptake into cells.

A single 28g serving of pumpkin seeds provides 39% of daily magnesium — making them one of the most practical and pleasant ways to meaningfully boost magnesium intake in a typical diet.

The Zinc Story: 71% From a Plant Food

At 71% DV per 100g, pumpkin seeds are one of the most exceptional plant-based zinc sources of any food — an important distinction because zinc bioavailability from plant sources is generally lower than from animal sources, making high-concentration plant zinc foods genuinely valuable.

Zinc from pumpkin seeds is non-haem zinc — the same bioavailability challenge applies as with non-haem iron. Phytic acid in the seed coat can reduce absorption efficiency. However, soaking or roasting pumpkin seeds reduces phytic acid content, and even at moderately reduced absorption efficiency, 71% DV per 100g provides a substantial zinc contribution.

Why Zinc Matters for Athletes

Zinc is directly required for testosterone synthesis in Leydig cells — athletes with low zinc status consistently show lower testosterone levels. Athletes also lose zinc through sweat during training, and heavy training blocks can deplete zinc status meaningfully over time. Pumpkin seeds’ 71% DV per 100g (20% DV per 28g serving) makes them one of the most practical plant-based zinc sources for maintaining the status that testosterone production depends on.

Zinc additionally supports immune cell production (particularly T-cell function), wound healing, and the enzymatic processes involved in protein synthesis and cell division — all directly relevant to training adaptation and recovery.

Tryptophan and Sleep: The Research Connection

This is one of the more genuinely interesting and most searched questions about pumpkin seeds — and the research behind it is worth explaining clearly.

Pumpkin seeds are one of the richer dietary tryptophan sources available from any plant food. Tryptophan is an essential amino acid that serves as the precursor to serotonin (a neurotransmitter regulating mood and sleep readiness) and melatonin (the hormone that regulates the circadian sleep-wake cycle). The serotonin-to-melatonin pathway is tryptophan-dependent, meaning dietary tryptophan availability can influence melatonin production.

Several clinical studies have specifically examined pumpkin seed protein or tryptophan-rich foods on sleep outcomes, finding modest improvements in sleep onset and quality in people with mild sleep difficulties. A notable study published in Nutritional Neuroscience found that a tryptophan-rich protein source combined with a carbohydrate (which promotes tryptophan crossing the blood-brain barrier by reducing competing amino acids in the bloodstream) improved sleep quality compared to placebo.

The honest qualification: the effect sizes are modest and most relevant to people with marginal tryptophan status or mild sleep difficulties rather than those with serious sleep disorders. Pumpkin seeds are not a pharmaceutical sleep aid — they are a tryptophan-rich whole food that contributes to the dietary supply of a sleep-relevant nutrient.

Practical application: a small amount of pumpkin seeds with a carbohydrate source (such as a small amount of fruit or oatmeal) in the evening is a reasonable, evidence-informed dietary strategy for supporting natural melatonin production, with no meaningful downside given pumpkin seeds’ broader nutritional value.

Health Benefits of Pumpkin Seeds

Extraordinary Magnesium for Energy and Stress Resilience

As detailed above, 141% DV magnesium per 100g makes pumpkin seeds one of the single most concentrated magnesium foods available. For anyone experiencing fatigue, muscle cramps, poor sleep, or anxiety — all of which can reflect magnesium insufficiency — pumpkin seeds are one of the most practical and nutritionally complete interventions available from a whole food source.

Outstanding Zinc for Immunity and Hormonal Health

At 71% DV per 100g, pumpkin seeds stand out as a genuinely useful plant-based zinc source for the immune function, testosterone production, and protein synthesis that active people depend on.

Strong Complete Protein

At 29.8g of protein per 100g, pumpkin seeds have one of the higher protein contents of any seed, with all 9 essential amino acids present. They are not a complete protein in the strict sense — methionine is the limiting amino acid, the common pattern among plant seeds — but their protein contribution per gram is genuinely exceptional for a seed food.

Prostate Health Research

Pumpkin seed oil and whole pumpkin seeds have been specifically researched for benign prostatic hyperplasia (BPH) — the non-cancerous prostate enlargement that affects most older men and causes urinary symptoms. Multiple clinical trials have found pumpkin seed oil supplementation significantly reduces BPH symptom scores and improves urinary flow compared to placebo.

The mechanisms are not fully established but likely involve the combination of zinc (the prostate has the highest zinc concentration of any organ in the male body), cucurbitin (a specific amino acid in pumpkin seeds studied for anti-inflammatory effects on prostate tissue), and phytosterols that may inhibit dihydrotestosterone (DHT) production.

This is one of the more specific and clinically documented traditional food applications in this entire collection — and an underappreciated reason for men over 40 specifically to include pumpkin seeds regularly.

Heart Health

Pumpkin seeds support cardiovascular health through multiple pathways — magnesium for blood pressure regulation, potassium (809mg per 100g) counteracting sodium’s pressor effects, polyunsaturated fat improving the blood lipid profile, phytosterols that reduce cholesterol absorption in the digestive tract, and their virtually zero sodium (18mg per 100g) content.

Blood Sugar Management

Despite their calorie density, pumpkin seeds have a low glycaemic index and contribute minimal digestible carbohydrate (14.7g total carbohydrate per 100g, with 6.5g fiber and most of the remainder resistant to rapid digestion). The magnesium content additionally improves insulin sensitivity through magnesium’s role as a cofactor for insulin receptor activation.

Antioxidant Properties

Pumpkin seeds contain carotenoids, Vitamin E, and phenolic antioxidants concentrated in the seed coat and oil fraction. These compounds help neutralize free radicals and support the antioxidant environment relevant to both general health and exercise recovery.

Pumpkin Seeds for Athletes and Active People

Magnesium: The Most Critical Training Mineral From This Food

As covered above — magnesium depletion through sweat is one of the most common and most performance-impairing nutritional deficiencies in active populations. Pumpkin seeds’ 141% DV per 100g (39% DV per 28g serving) makes them the most concentrated practical magnesium snack food available, surpassing most nuts and seeds except hemp seeds.

Zinc for Testosterone and Recovery

For male athletes specifically, maintaining zinc status through regular pumpkin seed consumption is a practical strategy for supporting the testosterone levels that heavy training can suppress over time. The 71% DV per 100g (20% per 28g serving) makes this one of the most zinc-efficient plant-based snacks available.

Iron for Oxygen Transport

At 49% DV per 100g (14% per 28g serving) in non-haem form, pumpkin seeds make a meaningful iron contribution for plant-based athletes managing iron status — particularly effective when consumed alongside Vitamin C-rich foods at the same meal, which can triple non-haem iron absorption.

Tryptophan for Sleep and Recovery

As covered above — quality sleep is perhaps the most undervalued component of athletic recovery. Including pumpkin seeds in an evening snack provides tryptophan alongside magnesium, both of which support the natural sleep processes that enable overnight recovery and adaptation.

Protein for Daily Targets

At 29.8g of protein per 100g (8.3g per 28g serving), pumpkin seeds contribute meaningfully to daily protein targets as a snack or topping, particularly for plant-based athletes assembling protein across multiple whole-food sources throughout the day.

Hulled Pepitas vs Whole Pumpkin Seeds: What’s the Difference?

Whole pumpkin seeds — the flat, white-shelled seeds from inside a pumpkin. The outer shell is edible but fibrous and chewy, with a tougher texture. Slightly higher total fiber due to the outer hull. Not as commonly sold commercially.

Pepitas — the hulled interior seed, dark green in color, flat and oval-shaped. The form most commonly sold commercially as “pumpkin seeds.” Easier to eat, more concentrated nutritionally per gram since the lower-nutrient hull is removed. The data on this page reflects hulled pepitas — the most widely available and consumed form.

Practical Ways to Include Pumpkin Seeds in Your Diet

As a snack — a 28g handful provides 39% of daily magnesium and 8.3g of protein at 161 calories, one of the most mineral-rich small snacks available.

As a salad topping — pumpkin seeds add crunch, protein, and extraordinary mineral density to any salad with virtually no preparation effort.

Blended into smoothies — adds protein and magnesium seamlessly without significantly altering flavour or texture.

Stirred into oatmeal — combining pumpkin seeds with oats creates a breakfast that covers magnesium, zinc, manganese, and protein alongside oatmeal’s beta-glucan and carbohydrate energy.

Pumpkin seed butter — similar in nutritional profile to whole seeds, spreadable, and a practical alternative to other nut butters for anyone wanting to vary their fat and mineral sources.

In trail mix — combined with dark chocolate and dried fruit for a portable, mineral-rich snack with complementary nutrition from each component.

As a breadcrumb substitute — ground pumpkin seeds used as a coating for baked proteins adds protein and mineral density to any preparation where breadcrumbs would otherwise be used.

Evening snack for sleep support — a small amount of pumpkin seeds with a piece of fruit (providing carbohydrate to assist tryptophan transport across the blood-brain barrier) is a reasonable, evidence-informed sleep-supporting ritual.

Potential Considerations

Calorie density — at 574 kcal per 100g, portion awareness is important for anyone managing total calorie intake. The extraordinary mineral figures scale to useful but more modest contributions at realistic 28g serving sizes.

Phytic acid and mineral bioavailability — like all seeds, pumpkin seeds contain phytic acid that reduces mineral absorption efficiency. Soaking overnight reduces phytic acid by 20–40%, improving the effective mineral contribution. Roasting also reduces it modestly.

Prostate health research applies to oil and whole seeds at meaningful amounts — the clinical prostate research has typically used pumpkin seed oil extracts at doses higher than a casual handful; however, regular dietary inclusion still contributes to the relevant nutritional factors involved.

Seed allergy — pumpkin seed allergy is uncommon but documented. People with known seed sensitivities should introduce pumpkin seeds cautiously.

Sodium in salted varieties — unsalted pumpkin seeds have just 18mg sodium per 100g; salted roasted varieties can carry 300–500mg+ per 100g. Choosing unsalted or lightly salted varieties is worthwhile for anyone monitoring sodium intake.