Chia Seeds: Nutrition, Omega-3, Fibre and How to Eat

By Nikola · Precision Nutrition L1 · Updated 4 November 2026

Chia seeds are the small black or white seeds of Salvia hispanica, a plant in the menta family. 100 g of dried seeds gives 486 kcal, 34.4 g of fibre and 17.8 g of alpha-linolenic acid (ALA), the plant omega-3. A 28 g portion, about two tablespoons, covers more than a third of the fibre EFSA considers adequate for a day and about 5 g of ALA. In liquid the seeds swell into a gel, which is why they are best eaten soaked rather than dry.

Chia seed nutrition per 100 g and per portion

Nutritivo	Dried chia seeds, 100 g	Portion: 28 g (about 2 tablespoons)
Energía	486 kcal	136 kcal
Proteína	16.5 g	4.6 g
Fat	30.7 g	8.6 g
of which polyunsaturated	23.7 g	6.6 g
of which ALA (omega-3)	17.8 g	5.0 g
of which saturated	3.3 g	0.9 g
Carbohydrate	42.1 g	11.8 g
of which fibre	34.4 g	9.6 g
Calcio	631 mg	177 mg
Hierro	7.7 mg	2.2 mg
Magnesio	335 mg	94 mg
Fósforo	860 mg	241 mg
Zinc	4.6 mg	1.3 mg
Manganese	2.7 mg	0.76 mg
Selenium	55.2 µg	15.5 µg

Source: USDA FoodData Central, SR Legacy, “Seeds, chia seeds, dried” (FDC 170554), checked 4 November 2026. The record’s household measure is 1 oz = 28.35 g, roughly two tablespoons; the 28 g column is calculated. NIH lists 5.06 g of ALA per ounce of chia. Values rounded.

Of the 42.1 g of carbohydrate in 100 g, 34.4 g is fibre, which leaves less than 8 g of other carbohydrate. In practice chia is a fat-and-fibre food, not a starchy one.

Glycemic index of chia seeds

Chia seeds are not listed in the international GI tables. Most of their carbohydrate is fibre, and a usual portion is small, so they add very little digestible carbohydrate to a meal.

Health benefits: what the evidence says

ALA and cholesterol. The EU permits the claim “ALA contributes to the maintenance of normal blood cholesterol levels” for foods that are at least a source of omega-3, with the information that the effect is obtained with a daily intake of 2 g of ALA (Regulation (EU) No 432/2012). About 11 g of chia, a little under one tablespoon, provides 2 g of ALA.
ALA is not fish oil. The body can turn ALA into the long-chain omega-3s EPA and DHA, but NIH describes this conversion as very limited, with reported rates below 15%. Most heart research on omega-3s has looked at EPA and DHA from fish, not ALA. Chia is a good ALA source; it does not replace oily fish. For reference, NIH sets the adequate intake of ALA at 1.6 g a day for men and 1.1 g for women.
Fibre. A 28 g portion gives 9.6 g of fibre, close to 40% of the 25 g a day EFSA considers adequate for normal bowel function in adults.
Minerals. Chia is rich in calcium, magnesium and phosphorus. Its iron is non-heme, absorbed less well than iron from meat, so pairing it with fruit that contains vitamin C makes sense.

Chia in the EU: a novel food

In the EU chia seeds are regulated as a novel food. They were first authorised in 2009 for use in bread products. Commission Implementing Regulation (EU) 2020/24 extended their use to foods that are not heated at or above 120 °C, such as dairy products, puddings, fruit spreads and non-alcoholic drinks, and for these removed the earlier maximum levels and the label statement on maximum daily intake. Uses that involve heating at 120 °C or more, such as bakery wares, were left for a later decision because of possible acrylamide formation.

Ayurveda: chia in the traditional system

Chia is not part of the classical Ayurvedic texts. In Usha and Vasant Lad’s modern food guidelines, chia seeds are favourable for Vata and Kapha and on the list to avoid for Pitta. This is a traditional view, not a clinical finding.

How to buy, prepare and use chia seeds

Chia pudding: stir 2 tablespoons (28 g) into about 150-200 ml of milk or a plant drink, wait 10 minutes, stir again to break up clumps, then leave it in the fridge for a few hours or overnight. Top with berries or chopped fruit.
With oats: add a spoonful to overnight oats or porridge together with extra liquid.
Yogurt bowl: stir soaked chia into Greek yogurt con blueberries.
Smoothies and drinks: soak the seeds first or blend them in with plenty of liquid.
Chia “egg” for baking: 1 tablespoon of chia with 3 tablespoons of water, left to gel, can replace one egg in pancakes or muffins.
Storage: keep dry seeds in a closed container in a cool, dry, dark place.

Who should be careful

Do not eat dry chia by the spoonful. Chia seeds absorb large amounts of water and form a gel. A published case report described chia seeds that swelled and got stuck in the oesophagus of a patient with probable eosinophilic oesophagitis, which is a medical emergency (Simmelink and colleagues, 2017). Soak the seeds or mix them into moist food, and take extra care if you have any difficulty swallowing.
Fibre-sensitive digestion. If you are not used to fibre, start with a teaspoon or two and drink enough water to avoid bloating.
Energy. At 136 kcal per 28 g, chia is nutrient-dense but not “free” food; a portion is a spoonful or two, not a cupful.

FAQ

How much chia seed should I eat per day?

There is no official daily amount. A usual portion is 1-2 tablespoons (about 14-28 g). Around 11 g already provides the 2 g of ALA linked to the EU cholesterol claim, and 28 g gives about 9.6 g of fibre.

Do chia seeds need to be soaked?

Soaking is the safer habit. Dry seeds swell and turn into a gel when they meet liquid, and a case of chia seeds blocking the oesophagus has been reported. Soaked in milk, yogurt or water, they are easy to eat and digest.

Are chia seeds as good as fish for omega-3?

No. Chia gives ALA, a plant omega-3, and the body converts less than 15% of ALA into the EPA and DHA found in fish (NIH). Chia is a useful ALA source, but it is not a substitute for oily fish.

Sources

USDA FoodData Central, SR Legacy: Seeds, chia seeds, dried (FDC 170554). fdc.nal.usda.gov
NIH Office of Dietary Supplements: Omega-3 Fatty Acids, Fact Sheet for Health Professionals. ods.od.nih.gov
Commission Regulation (EU) No 432/2012, list of permitted health claims (ALA and blood cholesterol). EUR-Lex
EFSA NDA Panel (2010). Scientific Opinion on Dietary Reference Values for carbohydrates and dietary fibre. EFSA Journal 8(3):1462. efsa.europa.eu
Commission Implementing Regulation (EU) 2020/24 authorising an extension of use of chia seeds (Salvia hispanica) as a novel food. legislation.gov.uk
Simmelink A, Rawl RE, Browne L, Scobey M. Watch it grow: Esophageal impaction with chia seeds. Case Reports in Internal Medicine 2017;4(2):49. sciedupress.com
Lad U, Lad V. Food Guidelines for Basic Constitutional Types, from Ayurvedic Cooking for Self-Healing, 2nd ed. The Ayurvedic Institute. ayurveda.com

This page is for information only and is not medical or dietary advice.

enciclopedia de comida

Avena Greek yogurt Arándanos, crudos Salmón Grasas de alta calidad

Chia seeds