Hi,

many are there, few examples,

Senna extract

Tannin extract

Grcinia extract etc,...

you can say your expected then you may get more information here.

All the best

Is it possible for spinach extract??

Phosphorus can trap calcium by forming calcium phosphates like tricalcium phosphate Ca3(PO4)2 ; apatite Ca5(Mg,Fe2+)(PO4)3(OH); whitlockite; Ca9(Mg,Fe2+)(PO4)6(PO3OH) . Phosphorus is abundant in nature (many foods, bones, teeth ...), nutritional yeast contains 1300 mg of phosphorus/100g of yeast; wheat germ contains approximately 1000 mg of phosphorus/ 100 g of wheat germ, spinach 40 mg of phosphorus / 100 g of frech spinach ... You should also study the enzymes that catalyze the calcium phosphate formation reaction