i learn about colostrum months ago, decided to get a bottle. after careful study, this contai certain % of IGG, which is essential in building our immune system. to be honest, i do not feel drastic changes, but i do feel more energetic and 'light'. I eat this with 4 tab of apple pectin, 1st thing in the morning. make sure have plenty fliuds intake through out the day. this is anti oxidant, with others essential supplements that i take daily. my distance families actually comment that i look vibrant and much younger! my younger kid who has bowel issue since young also benefiting from this product. he take 1 cap in empty stomach.