Research also demonstrated that the higher the level of caffeine, the more it interfered with vitamin D absorption. The study suggested that caffeine did this by reducing the expression of vitamin D receptors on osteoblasts in the body – the cells responsible for producing bone.
Therefore, conditions that affect the gut and digestion, like celiac disease, chronic pancreatitis, Crohn's disease, and cystic fibrosis, can reduce vitamin D absorption.
No interactions were found between caffeine and Vitamin D3.
Vitamin D deficiency is most commonly caused by a lack of exposure to sunlight. Some disorders can also cause the deficiency. The most common cause is lack of exposure to sunlight, usually when the diet is deficient in vitamin D, but certain disorders can also cause the deficiency.
Coffee strips your body of key vitamins.
Maybe your thinking, “vitamins, schmitamins.” But here's the deal, too much coffee depletes your supply of B vitamins, which is your natural source of energy. Caffeine also causes the body to dump other key nutrients like calcium, magnesium, potassium and iron.
Summary: Black tea and Green tea stop efficient absorption of Iron, Vitamin D and B-Complex vitamins.
Phenobarbital, phenytoin, and other anticonvulsant medications -- These medications may accelerate the body's use of vitamin D. Mineral oil -- Mineral oil also interferes with absorption. In addition, Vitamin D may enhance the effects of doxorubicin , a medicine used to treat a variety of cancers.
There's no quick fix to flush vitamin D out of your system, but staying hydrated and staying away from more vitamin D and calcium can help lower your levels.
“Adding an over-the-counter vitamin D supplement can make improvements in just three to four months time. Vitamin D with a strength of 1000-2000 international units daily is the recommended dose for most adults,” Dr. Ropte says.
Vitamin D Metabolism
The half-life of calcidiol is 15 days. This means that after 15 days, half of the vitamin D from an oral supplement has left the body and that 30 days after a dose of vitamin D only 25 percent of the vitamin remains.
Because vitamin D is fat-soluble, it is best absorbed when taken with a meal or snack that includes some fat.
"Adequate levels of magnesium in the body are essential for the absorption and metabolism not only of vitamin D but of calcium as well," Dean states. "Magnesium converts vitamin D into its active form so that it can help calcium absorption.
Try to avoid taking your vitamins with coffee or tea
The tannins and caffeine can interfere with the absorption of many vitamins and minerals, especially iron.
VITAMIN D - A high intake of sugar, particularly fructose, increases the production of a devious enzyme which degrades stores of vitamin D. It can also undermine the production of another enzyme necessary to synthesize this critical nutrient.
Any beverage or food containing caffeine such as coffee, tea, chocolate and some sodas can inhibit the absorption of vitamins and minerals and increase their excretion from the body.
There's no set time of day that's best to take vitamin D supplements. Some people say taking vitamin D supplements at night is an insomnia risk. There's no research to confirm this, but you might want to take your supplement earlier in the day if you think it's screwing with your sleep.
Caffeine may very modestly reduce calcium absorption (by about 4 mg of calcium per cup of coffee), but this can be offset completely by adding 1–2 tablespoons of milk to your coffee.
Vitamin D stimulates hair follicles to grow, and so when the body does not have enough, the hair may be affected. A vitamin D deficiency may also be linked to alopecia areata, an autoimmune condition that causes patchy hair loss.
Vitamin D insufficiency may relate to higher levels of anxiety and depression, in turn contributing to the elevated risk of psychosis in this population.
Growing evidence has demonstrated that vitamin D has a role in sleep regulation [12]. Specifically, vitamin D deficiency (VDD) can increase risk of sleep disorders and is associated with sleep difficulties, shorter sleep duration, and nocturnal awakenings in children and adults [13,14,15].