Master Seed Nutrition Comparison (Per 1 Oz / 28g)
Verified USDA FoodData Central nutritional values for the six most popular nutrient-dense edible seeds. Use this benchmark table to quickly evaluate protein, healthy fats, fiber, and micronutrients.
| Seed Type | Calories | Protein | Total Fat | Fiber | Net Carbs | Omega-3 (ALA) | Key Superpower |
|---|---|---|---|---|---|---|---|
| 🌱 Chia Seeds | 138 kcal | 4.7 g | 8.7 g | 9.8 g | 2.1 g | 5,050 mg | Highest Soluble Fiber |
| 🌾 Flax Seeds | 152 kcal | 5.2 g | 12.0 g | 7.8 g | 1.5 g | 6,390 mg | Highest Omega-3 & Lignans |
| 🌿 Hemp Hearts | 166 kcal | 9.5 g | 14.6 g | 1.2 g | 1.4 g | 2,800 mg | Complete Plant Protein (9 EAAs) |
| 🎃 Pumpkin Seeds (Pepitas) | 163 kcal | 8.5 g | 13.9 g | 1.8 g | 2.7 g | 50 mg | Highest Magnesium & Zinc |
| 🌻 Sunflower Seeds | 165 kcal | 5.8 g | 14.5 g | 2.4 g | 3.6 g | 20 mg | Highest Vitamin E (Antioxidant) |
| ⚪ Sesame Seeds | 160 kcal | 5.0 g | 13.6 g | 3.3 g | 3.8 g | 100 mg | Highest Calcium (Bone Health) |
How to Choose the Right Seed for Your Health Goals
⚖️ For Weight Loss & Fat Burning
Winner: Chia Seeds & Ground Flax
Chia seeds absorb up to 12 times their weight in water, expanding in the digestive tract to form a thick soluble gel. This slows gastric emptying, blunts post-meal insulin spikes, and activates satiety hormones like GLP-1 and PYY naturally.
💪 For Muscle Building & Plant Protein
Winner: Hemp Hearts & Pumpkin Seeds
Hemp seeds provide 9.5g of protein per ounce with all 9 essential amino acids in high bioavailability (rich in edestin and albumin proteins). Pumpkin seeds follow with 8.5g protein and massive magnesium to fuel ATP energy and muscle protein synthesis.
❤️ For Heart Health & Lowering LDL
Winner: Flax Seeds & Sesame Seeds
Flax seeds deliver over 6,300mg of ALA omega-3 fatty acids per ounce. When combined with dietary lignans (secoisolariciresinol diglucoside), clinical trials consistently show reductions in total LDL cholesterol and arterial stiffness.
😴 For Better Sleep, Testosterone & Recovery
Winner: Pumpkin Seeds (Pepitas)
Delivering 37% DV of magnesium and 19% DV of zinc per ounce, pumpkin seeds are essential cofactors for testosterone production and neurotransmitter synthesis (converting tryptophan into melatonin for restorative sleep).
Frequently Asked Nutrition Questions
Which seed has the most protein?
Hemp seeds (hemp hearts) contain the highest protein among all edible seeds, providing roughly 9.5 grams of complete plant protein per 1-ounce (28g) serving, followed closely by pumpkin seeds with 8.5g.
Which seed is best for weight loss?
Chia seeds and flax seeds are considered the best for weight loss due to their exceptional soluble fiber content (10g and 8g of fiber per ounce respectively), which slows digestion and prolongs satiety.
Which seed has the highest Omega-3 content?
Flax seeds contain the highest concentration of plant-based Alpha-Linolenic Acid (ALA) Omega-3 fatty acids (~6,400mg per ounce), closely followed by chia seeds (~5,000mg per ounce).
Do flax seeds need to be ground to get the nutritional benefits?
Yes. Whole flax seeds possess a tough outer cellulose hull that passes through the human digestive tract intact without being broken down. Grinding them into flax meal unlocks their omega-3 fats, lignans, and minerals.
Ali is a Dietitian and Nutrition Researcher with over 5 years of experience. Content is based on clinical trials and USDA FoodData Central guidelines to ensure evidence-based accuracy.