Yes, the OsCal brand uses oyster shell sources. I never would let my customers choose it. Some calcium carbonate is manufactured in chemical plants, and supposedly that contamination (which also includes cadmium in addition to lead now BTW) is supposed to be not a worry. The best way to tell is to read the labels carefully. Oyster shell must be listed in the ingredients if present.

The citrate form is slightly better absorbed, and also good for patients with a history or worry about kidney stones. Citrate helps prevent the calcium oxalate type which about 80% are.

But yes, thanks for the reminder, Chemar!

I've taken kava quite a lot in the past. So glad i stopped a few years ago.

I have moved away from using premium protein supplements recently due to budget issues. I am now using cheaper supplements but I am not entirely sure if they will be as beneficial to me. Does anyone have any advice?

It depends on who makes them. I have noticed that some good brands are coming down in price here in the states. I don't know what you have available there. The process would cost some money to manufacture, so ultra inexpensive types may not be what they claim.

this website: www.iherb.com ships to UK and has many protein powders, whey and soy, at reasonable prices. Jarrow for example, is one. Often things in stores can be much higher in price than iherb's (sometimes double or more!). Many of us here use iherb.