Dose - How much to use?

[Budder]

SWIM just received a tincture in the mail. It is the Full Spectrum Alkaloid Tincture - 150 mg alkaloids (2 mL). The description says

This tincture represents the very essence of Kratom. The full spectrum of alkaloids present in Kratom has been isolated, purified to the highest level, and captured in this tincture.

Just 2 mL of this full spectrum tincture concentrates the Kratom power equivalent to 10 full grams of "15x" Kratom extract offered by other sites. (It actually takes over 150 grams of Kratom leaf to make just 2 mL of this tincture).

. SWIM has just started experimenting with kratom. SWIM has been making tea with 10 grams (only done it twice) and that has worked well. How much of this tincture should he take to be close to that equivalent? Also, how does one take this tincture? Do you just drop it directly into your mouth?