> It wouldn't be much of a metabolism trick at all if it doesn't work in ketosis or fasting. If you can burn fat, it should still work. Body will always switch

> It wouldn't be much of a metabolism trick at all if it doesn't work in ketosis or fasting. If you can burn fat, it should still work. Body will always switch to burning mostly fat after a prolonged period of physical activity which studies suggest for moderate level of constant physical activity happens somewhere around 90 minute mark. There are no magic bullets.