Botox injections are measured based on units, more specifically, units of botulinum molecules, which is an essential element in these injections. The greater the number of units, the greater the strength of the injection, and the lower, the opposite. In order for an injection to target the specific area the right way and look natural, a precise number of units must be injected. Naturally, the common question is — how many units are necessary? As a complicated question, learn about some factors that go into this determination.

Area of the Face

Where on your face you want to have the injections administered is a major factor. As a general rule, the smaller the area you plan to target, the fewer units you want to use. For example, a Botox injection for the neckband will require more units than an injection around crow's feet, if you want to see noticeable results, given the size of the area. 

Sex

Gender is important because hormonally, males and females are quite different. One distinction these hormonal variances cause is a difference in the size of their facial muscles, with females having smaller muscles than males. The smaller the facial muscle, the fewer units that are necessary for the injection, as applying too many units to small muscles will have an unattractive outcome. Using too few units on a larger muscle will produce a limited shift in appearance if any.

Depth of Wrinkles

Another area that matters when it comes to determining how many units to inject is the depth of the wrinkles that are being targeted. Deep wrinkles are much harder to treat, as the impression they leave in the skin is more profound. Given this fact, it is harder to treat these wrinkles, which means more units of Botox are typically necessary to resolve the issues. 

Metabolism

Metabolism is much often focused around weight loss, but scientifically, metabolism is more of a measure of the rate at which an element is absorbed. In terms of Botox, the faster an individual's rate of metabolism, the faster the injection will absorb, or wear away. Consequently, individuals who have a greater rate of metabolism will need more units injected to extend the effects of the Botox and prevent a shorter lifespan.

When it comes time to determine precisely how many units of Botox you need, remember, your provider is your best source of information. It is best to follow their recommendation. 

For further details on Botox injections, reach out to a local cosmetic surgeon.