The most important groups that need calcium supplements are:

1. Postmenopausal women: After menopause, women may experience a decrease in estrogen levels, which increases the risk of osteoporosis. Calcium supplements, along with vitamin D, can help maintain bone health.

2. Older adults: Older adults may have reduced calcium absorption and increased bone loss, making them more susceptible to fractures and osteoporosis.

3. During pregnancy and during breastfeeding: Calcium supplementation plays an important role during pregnancy and during breastfeeding for several reasons, including building strong bones and teeth for the fetus and infant, preventing osteoporosis, building muscles and nerves for the fetus, and maintaining hormonal balance for the mother.

4. Vegetarian individuals: A diet based on eating plant foods may contain small amounts of calcium, so individuals who do not consume dairy products or foods fortified with calcium may need calcium supplements to meet their needs for this element.

5. Individuals who suffer from lactose intolerance: They may have difficulty digesting dairy products, and become more inclined to avoid them, as they are considered a major source of calcium in the diet.

6. Individuals who have problems absorbing nutrients from the digestive system: Some medical conditions, such as Crohn's disease, celiac disease, or gastric bypass surgery, may hinder the body's ability to absorb calcium from food.

Orthocal (chewable tablets) is the most suitable choice for all of these categories.