t’s amazing where some essential fatty acids pop up in nature and even more amazing how we can extract them and use them to improve our own health. Take the yellow evening primrose wildflower (Oenothera biennis) for example. Holland & Barrett Natural Evening Primrose Oil 1000mg has been extracted from the seeds of the wildflower using the cold-press method and enriched with vitamin B6, which contributes to normal energy yielding metabolism and can contribute to a reduction of tiredness and fatigue, and vitamin E.