I have been using this product for some time now, with my GP's blessing, due to the fact that I do not absorb well through my gut. I have osteoporosis, and need to improve my bone density. I am hoping that I am absorbing sublingually, but will not know until my next DEXA scan in 214, whether or not it has helped. It is pleasant to take, and has caused no side effects. It is good value for money.