Unexpected observations were a prominent reduction
in urinary calcium excretion from the run - in to the intervention phase with the fruits - and - vegetables diet and no increase in calcium excretion with the combination diet.
a) increased protein intake from animal sources (milk and meat) lead to significant increases
in urinary calcium excretion.
Not exact matches
But no, even though the acid load was neutralized, there was still [this] excess
urinary calcium, consistent with the radioactive isotope study, «challenging the long - standing dogma that animal protein consumption results
in an acidosis that promotes the [excess]
excretion of
calcium...»
Her professors or instructors are saying that high dietary protein increases
urinary calcium excretion, and then they make the assumption that, therefore, it's bad for bone health, but that's only part of the puzzle, and they're not understanding the increase
in intestinal absorption of
calcium that animal protein and protein
in general leads to.
A study published
in the British Journal of Nutrition found that when women drank 1/2 to 1 liter of grapefruit, apple or orange juice daily, their
urinary pH value and citric acid
excretion increased, significantly dropping their risk of forming
calcium oxalate stones.
The old thinking would predict that then there would be no
calcium loss since there is no excess acid to buffer, but no, even though the acid load was neutralized there was still the excess
urinary calcium, consistent with the radioactive isotope study, «challenging the long - standing dogma that animal protein consumption results
in an acidosis that promotes the increased
excretion of
calcium....
Urinary calcium excretion decreased
in the control and fruits - and - vegetables groups.
This pattern of findings can potentially be explained by the high fiber content of these two diets, which may have impeded
calcium absorption.22 Nonetheless, the substantial increase
in urinary phosphorus
excretion with the combination diet suggests that the subjects
in this group did consume more dairy products than the other participants.
Lowering dietary protein to U.S. Recommended dietary allowance levels reduces
urinary calcium excretion and bone resorption
in young women.
It was initially thought that high - protein diets may result
in a negative
calcium balance (when the sum of
urinary and fecal
calcium excretion becomes greater than
calcium intake) and thus increase bone loss (11).
In the kidneys, PTH stimulates the conversion of vitamin D into its active form (1,25 - dihydroxyvitamin D; calcitriol), which rapidly decreases
urinary excretion of
calcium but increases
urinary excretion of phosphorus.
Because of the increased
calcium excretion brought on by furosemide (i.e. an increase
in urinary calcium levels), there could be a problem using this medication
in patients with a history of
calcium oxalate bladder stone formation.