Supplementation forms

SDA is mainly supplied as Buglossoides arvensis oil. Therefore, SDA is a plant-based omega-3.

Physiological functions

It acts mainly as a “metabolic bridge” to EPA.

SDA does not accumulate in large quantities in tissues, as it is rapidly converted to EPA following ingestion. For this reason, tissue levels tend to be low, while EPA increases in a dose-dependent way.

By raising EPA levels, SDA can contribute indirectly to the cardiometabolic and inflammation-modulating effects associated with long-chain omega-3s, such as helping to maintain normal triglyceride levels and participation in anti-inflammatory processes.

Foods

SDA is not a major component of the staple diet. However, there are certain seeds (Ahiflower Buglossoides arvensis, Boraginaceae, black currant) that are rich in SDA.

Additionally SDA has been detected in some fatty fish varieties and marine products.

Bibliography

• Stearidonic acid as a supplemental source of ω-3 polyunsaturated fatty acids to enhance status for improved human health – PubMed
• Stearidonic acid improves eicosapentaenoic acid status: studies in humans and cultured hepatocytes – PMC
• Stearidonic Acid – an overview | ScienceDirect Topics