I think this is an excellent product, but it is extremely powerful and I wish it came with more comprehensive information about safe and proper usage. Most of what I found online emphasizes benefits but did not discuss side effects/risks or ways to reduce or avoid irritation. I recommend this product, but with the following caveat: Get ahold of a copy of the (I think) out of print book "The Cure Is in the Cupboard" which discusses dosing and applications. It still downplays potential side effects (written by seller) but is extremely helpful. I recommend getting both the lower potency (not super strength) AND this super strength one and experimenting with different applications. You may find that you prefer/tolerate the lower strength better for some applications and reserve the higher potency for stronger needs or for internal usage in caps (goes further). One note, you can put a few drops in an empty gelatin capsule and take during/after meals rather than putting under tongue or drinking as the manufacturer directs, to reduce potential for irritation. I prefer this after trying various means. I do highly recommend for tooth and gum issues, but it can cause teeth sensitivity in super strength. 1-2 drops on gauze and left on tooth, changed a few times a day. After any acute situation is under control, you might want to switch to lower strength. Fewer side effects such as nerve irritation, shooting pains (neuralgia type), tooth sensitivity, etc. Unexpected benefits and side effects included more energy, mental clarity, and drastically decreased appetite, more stable blood sugar. In sum, extremely powerful and effective antimicrobial that works really well. Awesome product, but very powerful.