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Botanical

Flaxseed

Flaxseed, also called linseed, is the seed of the flax plant, Linum usitatissimum. It supplies fiber, lignans and the plant omega-3 fat alpha-linolenic acid (ALA).

Also listed as Flaxseed Oil, Flax Seed, Organic Flaxseed Oil, Flaxseed Powder

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What does German guidance say?

BfR’s June 2026 guidance sets an adult limit of 15–20 g a day for raw ground seeds and recommends no more than 20 g daily because of cadmium. These are daily amounts, not per-meal allowances. 1

When could seeds be unsuitable?

Linseed medicines are unsuitable with swallowing problems or bowel obstruction. Unexplained rectal bleeding needs assessment; EMA advises professional advice if constipation persists after three days of use. 2

Side effects and medicines

Higher doses can cause bloating, fullness, and diarrhea. NCCIH flags theoretical interactions with anticoagulants and antiplatelet medicines, so medicine users should discuss supplement use with their clinician. 3

Pregnancy and breastfeeding

NCCIH considers pregnancy evidence inconclusive, with possible concerns for flaxseed and little safety information for flaxseed oil. Breastfeeding safety is also poorly established. 3

For information, not individual medical advice. Ingredient studies do not establish the effectiveness of these products.

Sources

  2. Lini semen European Medicines Agency