Here is a thread about mercury. Read the whole thread for answers
//www.curezone.org/forums/m.asp?f=337&i=11674

I am a firm believer in listening to what the body is telling you.
When something is wrong and it is unhappy, it lets you know with symptoms, both mental and physical.
When it is happy, it serves you well makes you feel pleasant. :)

Chlorella is hot money maker on the market at this time!

If you are showing an allergic reaction such as hives or throwing up, I would suggest you discontinue the use of chlorella. The same goes for gas, cramps or bloating in the intestines.
If there was a history of childhood cholic, alergic skin rashes or asthma in my family, I would not use chlorella.

Chlorella is high sulfur. If your body is already high in sulfur, adding too much sulfur could have adverse effects if you have impaired sulfur oxidation. Some people have an impaired ability to oxidize and detoxify sulfur compounds. This is well known by the inability to safely process sulfa-drugs. A buildup in the body of excess sulfur compounds can be uncomfortable and even life threatening.
More about Impaired Sulfur Oxidation here:
http://www.cfsn.com/sulph.html

Other than that, sulfur is great for the body.

You said: -->"" I'm not sure if I should stop talking it, or if maybe something else is causing these hives.""
All I can say is if "it's your thing...do whatcha wanna do".
Only you can decide what is right for you.

I will list sulfur rich foods at bottom of this message.
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I suggest using cilantro. I think it is the most powerful natural chelator of mercury and toxic metals in the body.

Add a quantity of cilantro to your diet daily, for two or three weeks. You can add a handful of fresh cilantro to a salad, mix a couple of teaspoons of cilantro pesto.
http://www.naturodoc.com/library/treatments/removing_heavy_metals.htm

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Foods Rich in Sulfur
For those of us with impaired sulfoxidation, knowing what's high in sulfur is critical.

Garlic, onions, and all of the allium family
Grains
methionine: corn, sunflower seeds, oats, chocolate, cashews, walnuts, almonds, sesame seeds (in that order).
cysteine: oats, corn (corn grits are higher than chicken, see Sulfur in Human Nutrition and Applications in Medicine, by Stephen Parcell, ND. Published by Thorne Research. [PDF].)
MSM: corn
Legumes (alfalfa: MSM)
Red meats
eggs
of chicken
[of duck maybe less so?]
Nuts & seeds
Broccoli and all cole-family (brassica) vegetables. This includes cabbages, pak choi, mustard, and watercress.
Asparagus
Coconut
Avocado (high in glutathione, which breaks down during digestion, yielding cysteine)
Watermelon (also high in glutathione)
Swiss Chard
Parsley
Spinach (high in lipoic acid)
Sweet potatoes and "yams" (American yams, Genus Ipomoea, not Dioscorea, which the rest of the world calls "yams") - a sulfur compound in this tuber chelates heavy metals. [Need documentation on this.]
Tomatoes (MSM)
Tea & coffee: MSM
Cows' milk: MSM
Whey proteins (high in cysteine & methionine)
Amino acids: cysteine, methionine
Thiamin / Thiamine / Vitamin B1 / aneurine
Biotin, Vitamin B7 or Vitamin H
http://www.canarys-eye-view.org/challenges/food/sulfurfoods.html

Chlorella is a very cleansing food that does re-distribute mercury and dump it all over your body while it tries to push it out.

If you are going to take anything with Chlorella, its best taken at the same time as 2 capsules of Sodium Alginite-- or "Algin". The one good source for this that I found online is "Nature's Sunshine" Algin-- but you can do a Google search - maybe you'll come up with more. I use the Nature's sunshine Algin.

Algin soaks up the mercury that Chlorella ends up re-spilling. Algin responges it up and pushes it out into your urine or bowel movements. Just drink plenty of liquids while taking the Chlorella/Algin.

I would never take Chlorella without Algin, because it is so sloppy in spilling mercury all over the body by itself. Some experts dont even reccomend Chlorella for this reason.

Do you have any metal fillings or bridgework in your mouth? If so, don't ever take any Chlorella until these are removed.

The Chlorella will keep pulling the mercury from the fillings and redistributing it in your body, otherwise.

This is just a thought I wanted to add because I've had the hives that you speak of for every year of my life although I'm still not sure what causes it (during allergy season and after fasting).

If chlorella does help remove heavy metals from the body, maybe your body needs help expelling it, and instead of getting removed through your exit point, it's coming out your skin.

The best thing I could suggest to help your body in detox would be sitz bathing. This helps correct the body in expelling toxins through the proper organs so it doesn't have to come out of your skin.

Here's a good article on this from Lapis's Alternative Health blog:

//www.curezone.org/blogs/m.asp?f=28&i=42