Question about black tea/rooibos tea rinse

[PoliticalPilot]

I have tried hard to eliminate most caffeine from my diet because I was getting addicted to it. I would really like to use the strong black tea and/or rooibos rinse on my hair (I heard 1 bag per ounce of water steeped over night). But I'm worried that if I leave it on for a while, it will give me a caffeine high. And if I use it all the time to keep shedding at bay, what will happen if I ever stop? Will the accumulated shedding happen all at once? (Like post-partum shedding?)
Just curious...:confused:

[Cupofmilk]

Rooibos is naturally caffine free I believe so that should be ok with that one

[jojo]

Rooibo does not contain caffeine and very little tannins, however it cant really be compared to normal black tea both very different.