I like cilantro too. It does really clear up my head. but... ideally as it may sound... 3 weeks to rid it completely... I doubt it. Defintely only 3 weeks to make the head feel whole bunches better but I think the mercury has issues as your body sends it through the liver and kidneys and then the colon for detox and exit... it tends to stick around down there (not all but enough) from what I can tell unless you actively do some bowel/colon cleansing and the hulda clark liver flush helps a lot too. If you don't get it out of your stomach/colon it will recirculate a bit, thus the achy shoulders etc, possibly more foggy head... sounds exactly like what I experience... and colon cleansing and liver flushing do help alleviate all of that.

Cilantro is great on spaghetti with olive oil, garlic and lemon juce. Chlorella is good but makes my head a bit foggy. maybe try kelp or algin instead. The chlorella is great in an enema (about 2 teaspoons powdered to a quart and a half of water) though to wash the exit way clean. don't leave it in there too long because it really pulls a lot of mercury from surrounding areas, you can feel it the first time especially, flush out with clear water after just 5 minutes or so or your toes might get achy for a week or two.