What makes you think you have/will have low supply?
I ask because I think there are only a few situations where lactation cookies are worth the investment.
If supply is low for medical reasons (such as thyroid etc.) lactation cookies are unlikely to make enough of a difference. If supply is low due to latch issues, sorting those out (easier said than done sometimes I know) would be far more effective and be a more long term solution.
I do think if you are having time away from your baby (for example going back to work) or are exclusively expressing, then the ability (in some folk) to produce just that little bit more when eating the cookies could be worth it. It really depends on your individual situation.
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