Flaxseed Protein

Protein

What is it

Flaxseed protein is a plant-based protein powder produced from flaxseeds (Linum usitatissimum) after oil extraction. It is used as a vegan, hypoallergenic protein source.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Vegan protein source

Limited Evidence

Complete protein with slightly lower digestibility than animal-based options; often blended with other plant proteins.

How it works

Flaxseed protein provides all essential amino acids though it is relatively low in lysine. Typical protein content of commercial powders ranges from 30-60% by weight. It is well tolerated by most people and lacks the common food allergens of dairy, soy, eggs, and gluten. The protein retains some natural bioactive components from flaxseed, including lignans (precursors to enterolignans with weak phytoestrogenic and antioxidant effects), small amounts of residual omega-3 ALA, and fiber.

Dosage

Typical serving: 20-30 g of powder providing ~8-15 g protein. Total daily protein needs: 0.8-1.6 g/kg body weight depending on activity.

When and how to take it

WHEN: Around exercise or distributed across meals. HOW: Mix into smoothies, baked goods, or water.

1 commercial form

Compare the main delivery options and what they’re best suited for.

Flaxseed protein powder

Vegan, hypoallergenic option.

Slightly lower digestibility than whey

Safety

Well tolerated. Allergic reactions rare. Low residual cyanogenic glycosides after processing.

Who should be cautious

People with rare flax allergy should avoid. Pregnancy: food amounts are safe; very high lignan intakes not recommended.

Interactions

May reduce absorption of medications taken simultaneously; separate by 1-2 hours.

Food sources

Flaxseed (ground)

Amount
2 tbsp = 3 g protein
%DV
—

Frequently asked questions

Is flaxseed protein complete?⌄

Yes, all essential amino acids are present, though lysine is lower than ideal.

Does it have omega-3?⌄

Some residual ALA may be present, but it's not a primary omega-3 source.

References

Flaxseed Protein on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Flaxseed Protein (PubMed search) — PubMed link

Track Flaxseed Protein with Pilora

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.