Ostelin was founded in 1942 and is the first company in Australia to develop and produce vitamin D. Vitamin D is an important element that promotes gastrointestinal absorption of calcium. It can help maintain normal levels of calcium and phosphorus in our blood, thereby maintaining healthy and strong bones. In addition, vitamin D also regulates cell growth, neuromuscular function, and enhances immunity. It can be said to be an important vitamin with many functions. In our daily lives, in addition to basking in the sun and allowing the sun to synthesize vitamin D on the skin, taking high-quality supplements is also a good way to absorb vitamin D. Ostelin, a health food brand from Australia, specializes in the development of vitamin D and calcium supplements. Its diverse products are specially developed for different age groups: for example, liquid vitamin D3 for young children and calcium tablets for adults. The product does not contain artificial colors, flavors or sweeteners and can be taken safely by both adults and children.