Hi All,
I noticed a while back that chewing gum could reduce my POIS symptoms by 50% or more. Originally, I thought this was from the chewing motion. But later I found out that essential oils (peppermint, spearmint, eucalyptus, thyme) are used in some gums to produce cooling, warming, tingling, spicy sensation in the mouth. Cough drops that contain menthol, camphor and thymol were also anti-inflammator in my case. The reason I bring this up is because essential oils are dirt cheap.
Fast forward about a year, there is concern about the price of the supplements in the
POIS Cascade Stack. So I have started a list of potential substitutes for omega-3 (the most expensive supplent in the stack). Below is a ranking of the anti-inflammatory potency of various supplements in units uM. The unit, uM, is short for for micro-moles per liter or uM/L. The supplements are ranked by their IC50 (50% inhibition concentration) value. Smaller values are better and mean that less is needed to inhibit the enzyme. The ranking goes from strongest (top) to weakest (bottom). The ranking assumes that arachidonic acid (AA) release is the main mediator of POIS. Therefore, the AA oxidizing enzymes and mast cell degranulation (MCD) are ranked in importance in the following way 5-LOX > COX-2 > MCD > COX-1 > 15-LOX (CYP450s are not considered). Some of the IC50 values are listed in ug/ml, but these will have to be converted to uM in order to confirm the ranking.
"In general, potent inhibitors are considered those with IC50 values less than 10 uM [159], although clinically significant interactions are expected when the IC50 values are less than 1 uM." -
Preclinical Development Handbook: ADME and Biopharmaceutical Properties- ginkgetin (5-LOX, IC50=0.33 uM)(COX-2, IC50=0.75 uM)(MCD, IC50=6.52 uM)
- Luteolin (5-LOX, IC50=2.3 uM)(COX-2, IC50<1 uM)(MCD, IC50 = 1.8 uM)(TNF-α and IL-6, IC50< 1 uM)
- omega-3 EPA (5-LOX, IC50=0.65 uM)(COX-2, IC50=1 uM)
- Thyme essential oil (name=Thymus vulgaris), (5-LOX, IC50=0.005 ug/ml)
- Tea Tree essential oil (name=Melaleuca alternifolia) (5-LOX, IC50=0.06 ug/ml)
- Oregano essential oil (name=Origanum tyftanthum, Carvacrol=42.76%, thymol=27.18%) (LOX, IC50=14.78 ug/ml)
- indomethacin (prescription medication) (5-LOX, IC50=360 uM)(COX-2, IC50=1.68 uM)(COX-1, IC50=0.028 uM)
- carvacrol (from thyme and oregano essential oil) (COX-2, IC50=0.8 uM)
- Resveratrol (5-LOX, IC50=2.7 uM)(COX-2, IC50=3.4 uM)
- Curcumin (5-LOX, IC50=0.7 uM)(COX-2, weak inhibition)(MCD, IC50 = 6.1 uM)(COX-1, IC50=50uM)
- Piceatannol (5-LOX, IC50 = 0.76 uM)(COX-2, weak inhibition)(COX-1, weak inhibition)
- Eucalyptol/1.8-cineole (IL-6, IC50=0.15 ug/ml=1 uM) (TNF-a, IC50 = 0.6 ug/ml = 4 uM)
- Cannabidiol (CBD from marijuana)(15-LOX, IC50=0.23 uM)(5-LOX, small potentiation)(COX-(1,2), weak inhibition)(IDO, IC50 = 0.9 uM)
- Boswellic acid (name=frankincense)(5-LOX, IC50 = 1.5 uM)
- Vitamin C (fat soluble) (name=Ascorbic acid 6-palmitate)(5-LOX, IC50=2.5 uM)
- Caffeic acid (5-LOX, IC50 = 46 uM)
- citrus essential oil (D-limonene>90%, orange, lemon, lime) (5-LOX, IC50=40 ug/ml)(COX-2, IC50=8.5 ug/ml)
- Chamomile extract (name=apigenin 7-O-glucoside) (COX-2, IC50=28.0 ug/mL)(aromatase, IC50=0.9 ug/ml)
- Fennel oil(name=Foeniculum vulgare) (LOX, IC50=68?2 ug/ml)
- Quercetin (5-LOX, IC50=400 ug/ml ~4 uM)(COX-2, IC50=40 uM)
- Myricetin (5-LOX, IC50 = 4.02 uM)
- Ginger essential oil (name=Z. officinale) (LOX, IC50=400 ug/ml)
- Piperine (from black pepper extract) (LOX, IC50=86 uM) (COX-2, IC50=20 uM)
I wanted to make this list "open-source". So feel free to post IC50 values for any LOX/COX inhibitors that you know of and I can update the ranking. The more supplements (IC50<10 uM)we add to the list the better. The bioavailability of each supplement varies greatly, so I know the IC50 is not a perfect representation of how effective the supplement will be for POIS. Just to be clear, I think omega-3s are essential for human life, so nothing can truly replace omega-3s in the diet. However, some supplements can serve a similar anti-inflammatory role, which is the motive for this post.
To take essential oils orally they will have to be diluted in a carrier oil like olive oil. For example, mix 1 part essential oil (thyme, oregano, or eucalyptus) with 9 parts olive oil (10% essential oil: 90% olive oil).
200mg (~0.2ml) of essential oil (2g total oil mixture) is one serving which should be taken with food since oils are fat soluble. Before you take it though, make sure you are not allergic to the oils by doing a skin allergen test. Basically, test your allergen response by applying the oil to a small area on the skin/arm and let it sit for a few hours. Initially, all essential oils cause some sort of cooling, warming, tingling, burning sensation because they stimulate the cold/pain receptors. However, they should not cause any damage or swelling (allegic response). Most of the other supplements in the list will come with some sort of intructions from the manufacturer on how to take them.
Final note, the IC50 is usually determined by incubation studies which don't determine how the inhibition happens. There are a number of ways the inhibition can occur (competitive binding, non-competitive binding, genetic expression, receptor mediated, etc...). So some of the supplements which inhibit COX/LOX by different means may be synergistic when supplemented together. It would be nice to know if there are synergies.
Graphical demonstration of the meaning of IC50.