To prevent stretch marks, it is recommended to apply oil or cream regularly. While there is no one-size-fits-all answer, applying them once every two days may not be sufficient for everyone. It's best to consult with a dermatologist who can provide personalized advice based on your skin type and individual needs. They may recommend applying the product daily or even multiple times a day for better results. Additionally, maintaining a healthy lifestyle, staying hydrated, and eating a balanced diet can also contribute to preventing stretch marks.