Ketosis - I'm not going to lie, it's not easy. It took me a good 6 weeks to feel comfortable with the diet. But now I'm feeling sharp, enjoying not feeling bloated after meals, and even have got rid of the love handles. So I've done a podcast on how to get into keto quickly with an absolute expert in his field - Dr Anthony Gustin.
PS - I'm not doing this diet to lose weight. I'm doing it to increase energy, decrease inflammation, and generally feel awesome. But weight loss and toning up has come too. (He says modestly.) Always consult your practitioner before embarking on a new diet - especially ketosis which does require some adjustments in terms of supplements.