Spirulina as a source of vitamin A

Area of Science:

• Nutritional Science
• Algal Biotechnology
• Animal Nutrition

Background:

• Vitamin A is essential for vision, immune function, and cell growth.
• Blue-green algae, such as Spirulina, are known to contain various nutrients, including carotenoids.
• Assessing alternative, natural sources of essential vitamins is crucial for human and animal health.

Purpose of the Study:

• To evaluate Spirulina fusiformis as a dietary source of vitamin A in rats.
• To compare the vitamin A bioavailability from spirulina with synthetic vitamin A and beta-carotene.
• To determine the impact of spirulina consumption on liver and plasma vitamin A levels.

Main Methods:

• Rats were fed either synthetic vitamin A or spirulina as the sole vitamin A source.
• Absorption and availability of carotenes from spirulina extract were compared to crystalline beta-carotene.
• Liver and plasma concentrations of vitamin A and carotene were measured in experimental and control groups.

Main Results:

• Spirulina-fed rats exhibited significantly higher liver vitamin A concentrations compared to control rats.
• Absorption of beta-carotene from spirulina extract was comparable to crystalline beta-carotene at lower doses.
• Spirulina carotene supplementation led to higher-than-expected liver vitamin A storage and plasma levels.

Conclusions:

• Spirulina fusiformis can serve as an effective source of vitamin A in the diet of rats.
• The bioavailability of vitamin A from spirulina is comparable to established sources.
• Spirulina holds potential as a natural, nutrient-rich supplement for enhancing vitamin A status.