I see the point you’re making about individual variability, but let me reframe it a bit. Instead of comparing different people’s responses, imagine the same person taking shots of tequila on separate occasions. If one time the tequila hits harder and another time it doesn’t, that person can still form a reasonable opinion about whether the tequila feels more or less potent to them across those instances.
In a similar way, my experience with Lisa’s product is based on how it affected me compared to other products I’ve used, including AmoPure. While individual results may vary, personal experience is still a valid way to gauge potency—just like someone tracking their own responses to the same tequila over time. I’m not dismissing the idea that effects can fluctuate, but patterns in personal experience can still say something meaningful.
This version keeps the core of your message but makes it more concise and clear while addressing his point directly.