ABOUT ZIM'S MAX FREEZE
Zim's Max Freeze offers a line of products marketed to "tackle your toughest muscle pain." It is distributed by Kobayshi, a company that began in Japan in 1886 as a wholesaler of over-the-counter medicines; in 1998 they expanded to the Americas.
ZIM'S MAX FREEZE ACTIVE INGREDIENTS
Speaking of menthol, this organic compound is made synthetically or obtained from mint oils.
Menthol stimulates the transient receptor potential channel melastatin 8 (TRPM8). This receptor is responsible for the well-known cooling sensation it provokes when inhaled, eaten, or applied to the skin.
Menthol also has weak analgesic (pain-killing) effects due to select activation of the κ-opioid receptor. This receptor is a protein that mediates a variety of effects including changing our perception of pain, consciousness, motor control, and mood.
ZIM'S MAX FREEZE SIDE EFFECTS
There are no known major side effects for using Zim's Max Freeze topically (on the skin, external use only) as directed. Although one should seek medical attention if severe allergic reaction occurs. Not a good idea to use on broken or damaged skin, and be sure to keep it clear of the eyes - ouch.
I found an established body of research that may suggest the use of menthol for mild pain relief. Given the very low risk and very limited side effects, it would seem worth a try for individuals seeking a complementary and/or off-the-shelf product for pain relief.