Introduction: Dyslipidemia is one of the most common metabolic disorders. Vitamin D is one of the essential fat soluble vitamins which has many functions in the human body. Aim: The aim of this study was to evaluate the association between dyslipidemia and vitamin D deficiency. Materials and methods: This is a cross-sectional study which included 130 participants (58 males and 72 females) aged between 20-70 years and conducted between June 1 and October 30, 2020. The level of vitamin D was determined for each participant; we also measured the serum levels of cholesterol, triglyceride, high density lipoprotein, and low density lipoprotein. Results: There were 79 persons with vitamin D deficiency, 21 persons were vitamin D insufficient, and 10 - vitamin D sufficient. There were significant differences in the level of cholesterol, triglycerides, high-density and low-density lipoproteins according to the level of vitamin D. Conclusions: Deficiency of vitamin D has a negative impact on the levels of cholesterol, triglycerides, high-density and low-density lipoproteins.

Obesity is considered as a public health problem that affects all age groups in the population. Genetic factors are considered as one of the non-modifiable risk factors, causing obesity. Hypertension is a chronic medical condition that is associated with vague symptoms. The ABO blood type is one of the fundamental genetic factors that can give important information for early detection of risky population. This study aimed to evaluate the impact of different blood groups on body mass index and blood pressure. The design of this study is a cross-sectional study, included 250 participants (144 males and 106 females), aged between 18-70 years were selected from the population of Al-Najaf Governorate, Iraq, through a period which extends from October 2019 to February 2020.  The blood groups were determined for each participant; blood pressure and body mass index were also measured. The results of a current study revealed that from this 250 participants there was 115 were obese person, 82 were overweight person, 51 were normal weight, and 2 were underweight persons. In the obese group, the blood group B has the highest percentage (45.2% ) followed by blood group A and O that were found to have the same percentage (22.6%), while the blood group AB has the lower percentage (9.6%). On the other hand, there was no significant relationship between hypertension and ABO blood groups.

The immune system is a complicated system; it is consisted from network of specialized organs, tissues, cells, proteins, and chemicals which it has the function to protect the host from various types of pathogens such as bacteria, virus, fungi, and parasite in addition to cancer cells. Antioxidants are defined as agents that can prevent the damage that is caused by free radicals through scavenging of them. They decrease the damage by neutralizing to the free radicals before they attack any of the cells and can prevent lipids, enzymes, proteins, carbohydrates, and DNA damage.

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