From what have learned from living in a dry climate, water is the most essential tool in stretch mark prevention. I drink a gallon daily. Another thing most women don't know is that most body washes contain chemicals that dry out the skin, causing susceptibility to stretch marks ( sodium laureth sulfate). This chemical also causes mutation of the skin cells and overactive sweat glands (from the dryness), leading to acne of face and body. Keep your body moisurized with oil ( I would recommend grapeseed oil because it doesn't clog pores), not lotions because they clog pores. I am prone to stretch marks and when I just rinse my body with warm water, it stays moisturized just fine! I don't get stretch marks when I do these things, just when I stop and my skin gets dried out. I hope this helps! Good luck to you!
San Marcos, Tx
Montreal, Quebec, Canada