These products contain 100-150 mg of magnesium, as DiMagnesium Malate or a blend of the Malate and Magnesium Lysinate Glycinate Chelate forms. In terms of function, there is not a significant difference between these products.
Active Magnesium Chewable provides a chewable alternative to the encapsulated Optimal Magnesium, which can be better for children or individuals who have trouble swallowing pills. If swallowing capsules is not a problem, and you prefer a product that includes a chelated magnesium (usually gentler and less likely to cause gastrointestinal upset), Optimal Magnesium might be a good choice. Optimal Magnesium also contains 50 mg more magnesium than the Active Magnesium.
If you are also in need of a vitamin B6 supplement, Magnesium Plus provides both magnesium and vitamin B6 in a convenient single capsule. Some research suggests that vitamin B6 may help support magnesium absorption, and the combination of B6 with magnesium may be especially supportive of nervous system health and normal stress response. Note that one's need for vitamin B6, as for magnesium, may be influenced by diet, health conditions, enzyme activity, age, weight and other factors, and that supplementation with both compounds may not be necessary for every individual in order to benefit from potential positive nutrient-nutrient interaction. For example, if your diet includes plenty of vitamin B6 rich foods, such as fish, meat, potatoes, and most fruits (not citrus), you may not need to use a supplemental vitamin B6 in order to support magnesium absorption.*
Your qualified healthcare professional would be the best resource for helping you to determine which magnesium product is best for you, and whether you may benefit from a magnesium supplement that also includes vitamin B6. All three products are designed to deliver well-absorbed forms of magnesium for individuals who require supplementation of this important mineral.*