Did You Know the Recommended Dietary Allowance is Based on Elemental Zinc? So, how much zinc should you take per day? That depends on the type of zinc, since each contains a different amount of elemental zinc. For example, zinc sulfate consists of 35% elemental zinc, so 45 mg of zinc sulfate contains 15 mg of elemental zinc. What is the other 30 mg? ... It's sulfate. This is an important distinction, especially, if you are seeking to boost your immune system. For adults, the recommended daily serving is typically 15 mg of elemental zinc. Supplementing with 15 mg of elemental zinc may improve immunity, hormone levels, eye, heart, skin, hair and nail health, and much more. Other brands may state their serving amount is 15 mg of zinc (the zinc with the sulfate), but in reality it's only 5 mg of elemental zinc. A 15 mg serving of zinc sulfate and a 15 mg serving of elemental zinc are not the same. Make certain you look for the amount of elemental zinc on the label. You can be confident that each serving of our zinc provides you with a full 15 mg of elemental zinc, which is the amount of actual zinc without the sulfate – the amount your body needs on a daily basis. Ionic Zinc Is Readily Absorbed By The Body When a mineral is in ionic form, the body is able to absorb it immediately, especially when it's in liquid form. For even faster absorption you can place it under your tongue, but it's not necessary to do so. Preferably, you will want to to mix your liquid zinc with a beverage of your choice.