I looked at the Tropical Oasis Calcium Magnesium's label.
First thing that jumps out at me is that a single dose is 1200mg calcium. So make sure you're only taking HALF a dose at a time. Your body can only process a maximum of 500mg of calcium at a time.
The second thing that concerns me about that brand is the low dose of Vitamin D. Only 100IU per serving.... or actually 50IU per dose. Yikes! With a doseage of 500mg of calcium you should be taking in about 250IU of Vitamin D. Calcium and D work together to help each other absorb better. One depends upon the other. Calcium taken without Vitamin D has been shown to be virtually useless. So if you choose to use this calcium supplement, then you need to be taking an additional dose of Vitamin D with it each time.
Magnesium can be toxic to the body if taken in too high of a dose. The recommended daily limits range between 1,000IU and 5,000IU per day, depending on your body type and build. So be careful with adding more magnesium just to relieve constipation.
I looked into Boron. Daily recommended doseage is just 1mg. With your Tropical Oasis you'll be getting about 1.5mg. And if you check into what foods you can get Boron from, it's pretty easy to get that mineral from a normal diet so supplementing it with extra isn't really necessary. Here's a link: http://www.lef.org/abstracts/codex/boron_index.htm
You should be looking at more natural ways to relieve constipation (like fiber from natural foods like fruits, veggies and whole grains). Calcium is calcium no matter if it's liquid, powder or pills --- it's going to cause some constipation no matter what, so you need to counter balance that with your diet. At the beginning after my surgery I was taking MOM and laxatives every few days to be able to poop. But now that I'm able to eat a larger variety of foods I can control my digestive system better by increasing fiber and dealig with it the natural way.
As for how much calcium you should be taking per day. What has your doctor recommended? Most post-op patients start out at 1500mg per day
. So 3 doses spaced throughout the day. My doctor has me on an extra dose because I'm on birth control which tends to leach calcium from my body, so I take 2000mg per day of Calcium (which also gives me 1000IU of Vitamin D with those doses).
I would highly suggest trying out UpCalD. It's the best form of calcium I've been able to find without having to swallow 4 extra pills throughout the day.