Safety and side effects

When used orally at appropriate doses, creatine is likely safe to take for up to five years. As with any dietary supplement, it's important to choose a product that follows recommended manufacturing practices and subscribes to third-party testing to ensure the product's quality.

Creatine can cause:

• Weight gain, generally as lean body mass

Creatine might be unsafe for people with preexisting kidney problems. However, further research is needed.