Nutrition and Biochemistry: Iron and Vitamin D Status

Running head: NUTRITION AND BIOCHEMISTRY: IRON AND VITAMIN D STATUS
NUTRITION AND BIOCHEMISTRY: IRON AND VITAMIN D STATUS
Name of the Student:
Name of the University:
Author note:

1NUTRITION AND BIOCHEMISTRY: IRON AND VITAMIN D STATUS
Introduction
This paper will succinctly discuss, the numerous nutritional and biochemical metabolic,
absorptive and storage processes underlying the consumption of Vitamin D and iron and their
effect on deficiency disorders, as evident in the scenario of Liz.
Content
Iron and Vitamin D
Liz’s symptoms are reflective of Vitamin D deficiency. Common symptoms which have
been evidenced to reflect the same and observed within Liz, include: constant feelings of fatigue
and weakness and a subsequent pain across limbs and muscles (Jin et al., 2016).
After overcoming systemic circulation, according to Quraishi and Camargo (2012),
vitamin D binds itself to a protein known as ‘vitamin D binding protein and later, encounters
hydroxylation to the compound 25(OH)D. 25(OH)D. These substances also gets converted to
calcitriol with the help of enzymes in the kidney. Calcitriol is known to possess a high potency of
vitamin D-related functions and is the hormonal component of vitamin D. According to
Rosanoff and Shapses (2016), this process of conversion in both the kidney and the liver is
regulated by enzymes 1-alpha hydroxylase and 25-hydroxylase. Interestingly, the functions of
these enzymes as well as the binding between vitamin D protein and vitamin D, are controlled by
magnesium. Liz is not consuming foods rich in magnesium, which mainly include: legumes
(kidney beans, chickpeas, black beans), green leafy vegetables, nuts and seeds, seafood like fatty
fish and numerous fruits (avocado, bananas, raspberries). Thus, it can be implied that Liz’s

2NUTRITION AND BIOCHEMISTRY: IRON AND VITAMIN D STATUS
present contribution of vitamin D deficiency is largely caused by deficiency of dietary calcium
(Cashman, 2015).
According to Scragg et al., (2017), vitamin D has also been evidenced to control the
production of cytokines in the body – compounds playing a key role in inflammation due to fatty
acid oxidation. Indeed, vitamin D status has been researched to be inversely related to life-
threatening cardiovascular conditions like myocardial infarction. Dyslipidemia due to increase
adiposity within the endothelial walls leads to oxidation of low-density lipoproteins – a
pathological process which may be heightened in case of Liz, hence increasing her risk of future
acquisition of adverse heart disease. Liz’s risk of adiposity is also evident in her vital sign and
anthropometric abnormalities of tachycardia, hypertension and obesity. This may further
aggravate her risk of oxidative stress, resultant damage to essential endogenous proteins like
vitamin D binding protein, deficiency of vitamin D and cardiovascular diseases (Heidari et al.,
2015).
Calcitriol also assists in intestinal absorption of calcium. Thus, Liz’s is also suffering
from deficiency of calcium, which further aggravates her risk of bone density loss, reduced bone
strength, resultant bone conditions like osteoporosis and fatal injuries in the form of fractures
(Chonchol & Kendrick, 2018).
Liz is suffering from iron deficiency anaemia, considering her symptoms of cracked
corners in her mouth, hypoxia and distortion in nails (Camaschella, 2015). Iron undergoes
absorption in the duodenum and jejunum resulting in reduction to ferrous iron. This is then
transferred via transferrin, across systemic circulation and cellular membranes. Transferrin is
also associated with the transport of iron to the storage compound ferritin (Yang et al., 2016).
Vitamin C has been researched to increase ferritin expression and cellular uptake of iron. Liz’s