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1. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5465813/pdf/S2048679016000410a.pdf

2. https://medcraveonline.com/JNHFE/nutritional-and-health-importance-of-hibiscus-sabdariffa-a-review-and-indication-for-research-needsnbsp.html

3. https://www.sciencedirect.com/science/article/pii/S0023643819310692

4. https://www.blogs.nrcs.usda.gov/Internet/FSE_PLANTMATERIALS/publications/mipmcpg9776.pdf

5. https://www.cdc.gov/nutrition/micronutrient-malnutrition/index.html