Hemp seed oil is rich in polyunsaturated fats, which are more prone to oxidation than saturated or monounsaturated fats. Oxidation is what makes an oil turn rancid, producing a stale or sharp smell. Light, heat, and air all speed up this process, so storage matters.
Practical storage tips:
- Keep the bottle in a cool, dark cupboard or in the refrigerator. Avoid placing it next to the stove, above the oven, or in direct sunlight.
- Close the cap tightly after every use so the oil has as little contact with air as possible.
- If you refrigerate it, the oil may turn cloudy or slightly solid. This is normal for plant oils and clears again at room temperature.
- Try not to let water or food particles get into the bottle. Use a clean, dry spoon if you need to measure some out.
The product does not list a specific shelf life in its description, so the best guide is your own senses. Fresh hemp seed oil has a mildly nutty, earthy aroma. If it develops a stale, bitter, or "old nut" smell, or if the taste becomes sharp, the oil has likely oxidized and is past its best.
The 250 ml format is useful if you do not use oil very quickly. Refrigerating it after opening usually keeps it fresher for longer, but it still will not keep indefinitely. Buying a smaller bottle can help you finish it while its flavour is still good.