Nature’s Sunshine Zinc is ‘buffered’ so won't irritate those with sensitive stomachs, and gastrointestinal systems. For more efficient absorption, and for maximum benefit, Nature’s Sunshine Zinc is combined in a rich, natural base of kelp plant, alfalfa herb and thyme herb. Zinc is needed for the growth and development of the skeletal system, provides support for immune health and has been shown to support skin, wound healing. Whilst, Calcium, Phosphorus essential for bone growth and ensure optimum bioavailability and support gastric tolerance. And added Thyme, Kelp, Alfalfa have a rich supply of vitamins, nutrients, and almost every mineral and trace mineral essential for optimum health