Kayla Itsines is an Australian fitness model - it seems like Australia has a lot more celebrity fitness models than the other countries in the world. Anyway, Kayla is a certified fitness training, that has an almost cult-like following on social media, of over 6 million followers - that's the most of any featured up till now. Many of her fans swear by her "Bikini Body Guide," which has helped thousands of people.
She tried not to follow any of the fad diets - instead, she follows her own healthy food regimen. One of her recommendations lists poached eggs and an avocado and tomato for breakfast. For snacks, you can have strawberries and cream smoothie, which can be made by using 160g of strawberries, 250ML of low-fat milk, 150g of low-fat yogurt, and 1 scoop of protein powder - in her case, vanilla flavored.