The thick, syrupy consistency is normal and expected — it comes from ricinoleic acid, which makes up roughly 85–90% of castor oil's fatty acid profile. This density is exactly what lets the oil coat hair shafts and form a moisture-sealing layer on skin. In cooler temperatures (below ~20°C / 68°F) it thickens further and may barely flow from the 25 ml dropper bottle. To make dispensing easier, roll the closed bottle between your palms for 30–60 seconds, or stand it in a cup of warm (not boiling) water for a minute; the oil will thin noticeably without degrading. Do not microwave the bottle. If the dropper inserts clogs, remove it, rinse with warm water and a drop of mild soap, dry thoroughly, and replace. When applying directly to skin or hair, warming a few drops between your fingertips before contact solves most spreading issues. The oil does not need to be refrigerated; store at room temperature away from direct sunlight. A 25 ml bottle typically lasts 6–12 months with regular cosmetic use. If the oil develops a rancid smell, changes color dramatically, or shows particulate matter, discard it — these are signs of oxidation, not normal variation.
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