(Martin Cabrejas and others 2009; Embaby 2010. but lantana seed contained a lower level The tannins content of lantana and sweet pepper seeds and nabak seed kernel were 2 2.89, and 6.28 ng/g, respectively. Thus, nabak seed kernels contained the highest level of different antinutritional compounds. Conclusively, the studied seeds be treated to remove reduce the of trients before the incorporation of them into food or animal diets. To the best of our knowledge, there are no data reported in the literature regarding the antinutritional factors in lantana, sweet pepper, and nabak seeds.