Bananas are one of the best sources as are milk and other dairy foods. This can also help with alcohol, as this drug also depletes this and other amino acids. MDMA and similar drugs also use up calcium from the action on neurons. Calcium acts like a battery for these cells, so if you turn them on harder you can expect to use more calcium. Jaw grinding becomes much worse if Calcium levels are depleted.
Milk again is a good source of calcium.
Speed or methamphetamine , by way of over stimulation produces more of the neurotransmitter called dopamine. This substance, is produced from the amino acids phenylalanine and tyrosine. Available at health shops and chemists, these can be taken as supplements to increase the availability to the body of these building block molecules prior to taking speed or derivatives. The body's calcium levels, as with MDMA are reduced by amphetamines although normally not as much. Milk will help with this although your body's ability to absorb calcium is not that good.