Heya. Are any of you in the 50's age range and taking X? How's that working out for ya? SWIM's parents may be in need of a 100-150mg dose and SWIM means just one time. That is, once I have tested (as in with a test kit to lessen the chance of adulterants) the capsules. SWIM's only real concern was the increased heart rate and blood pressure. I do not consider people in their 50's to be "old," however, in this case case they do not workout or strain their physical body as a normalcy. Whereas a younger body may be able to handle the stress even if they are some unfit chap. My assumption is that the older the physical body the stress of X may take a higher toll. They have no health conditions that I know of at this time and an inquiry would be made just to be completely on level with their health. They would be taking their normal vitamins and pre/post dosing with 5htp. Thanks for any input.