Natural Beta Carotene: From Dunaliella salina algae. Nature's Plus Natural Beta Carotene Softgels contain 25,000 IU of Vitamin A activity and no chemicals or preservatives are used in production. Dunaliella salina is a single-celled algae, cultivated in seawater or salt lakes, producing 10,000 times more Beta Carotene than carrot cells.
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