Wheatgrass in thalassaemia
Wheatgrass juice or extract has shown some promise for reducing the required frequency of blood transfusions in thalassemic patients, possibly due to iron chelating activity.  However, few high-quality controlled studies have been conducted so it may be too early to form a definite conclusion.

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Choudhary, Dharma R.; Naithani, Rahul; Panigrahi, Inusha; Kumar, Rajat; Mahapatra, Manoranjan; Pati, Hara Prasad; Saxena, Renu; Choudhry, Ved P. (April 2009). "Effect of wheat grass therapy on transfusion requirement in β-thalassemia major". The Indian Journal of Pediatrics 76 (4). pp. 375—376. doi:10.1007/s12098-009-0004-6.
Das, Priyabrata; Mukhopadhyay, Ashis; Mandal2, Suvra; Chandra Pal, Bikas; Mishra, Raghwendra; Mukherjee, Debarati; Mukhopadhyay, Soma; Basak, Jayasri; Kar, Manoj (2012). "In vitro studies of iron chelation activity of purified active ingredients extracted from Triticum aestivum Linn. (wheat grass)". European Journal of Medicinal Plants 2 (2). pp. 113—124. doi:10.9734/EJMP/2012/1059.
Marwaha, R.K.; Bansal, Deepak; Kaur, Siftinder; Trehan, Amita (July 2004). "Wheat grass juice reduces transfusion requirement in patients with thalassemia major: A pilot study". Indian Pediatrics 41. pp. 716—720.
Mukhopadhyay, S.; Basak, J.; Kar, M.; Mandal, S.; Mukhopadhyay, A. (2009). "The role of iron chelation activity of wheat grass juice in patients with myelodysplastic syndrome". Journal of Clinical Oncology (Meeting Abstracts) 27 (15S). p. 7012.
Singh, Karnail; Pannu, M. S.; Singh, Palwinder; Singh, Jaswinder (January 2010). "Effect of wheat grass tablets on the frequency of blood transfusions in thalassemia major". The Indian Journal of Pediatrics 77 (1): 90—91. doi:10.1007/s12098-010-0002-8.
Tirgar, P. R.; Desai, T. R. (September 2011). "Investigation into iron chelating activity of Triticum aestivum (wheat grass) in iron-dextran induce iron overload model of thalassemia". Journal of Pharmacy Research 4 (9). ISSN 0974-6943.