These extraordinary and extrasensory powers that are called the Ashtasiddhis–the warning is that one should not give too much attention to these powers because you know powers corrupt and absolute power corrupts absolutely. So stay clear and move towards spiritual fulfillment or the realisation of one’s true self that is a spark and a part of the Supreme Reality. This indeed is the aim of yoga–Kundalini yoga or any other yoga for that matter.
Since the Kundalini also generates heat in the physical body, the practitioner should keep to simple food–not too hot and also not too cold foods taken directly from the refrigerator. At least in the beginning of the practice of Kundalini, it is a good idea to go vegetarian and to not smoke because nicotine has the capacity to block the passage of the Sushumna and block the movement of the energies in the chakras. One who practises Kundalini yoga and experiences even the beginnings of the bliss waves in the Sushumna will not need to smoke. The dopamine that is released by nicotine can also be released just by meditating on the spinal cord without the aid of a chemical agent. Soon a sense of wellbeing, independent of anything external, begins to be felt by the practitioner. When that happens, the yogi is on his way to the higher regions and greater dimensions.
When I say greater dimensions, I mean greater dimensions not only of his consciousness but also the greater dimensions, which mean ideas and experiences that are beyond the three-dimensional world, which we know of through our senses.
Tantra describes many ways by which ordinary mundane, physical and sensual activity can be converted or sublimated to the spiritual level of being able to awaken the Kundalini and take it to the highest chakra, the Sahasrara chakra.