If 10ppm=10mg/liter how many ppm are in 5mcg/tablespoon or 4oz of 5mcg/tblsp in one gallon of water?

Oh, lor'. There are so many places to trip up with this. Firstly, how many ml in a tablespoon? Apparently, a US tablespoon is 14.8ml. And I know US pints and gallons are different from UK ones, so I can't work on the "pint of water weighs a pound and a quarter/20 fl oz in a pint" basis.

OK, so there are 128 US ounces in a US gallon. 1 fl oz = 29.5ml. Mcg is microgram (1/1000mg) and a unit of mass, as millilitre is a measure of volume. I'm not surprised your brain is hurting......

Here's the best I can do. If you put 4 oz of the solution into a gallon jug, you have a total of 132 oz. Multiply by 29.5, to give a total of 3894 ml. The 4oz you've put in is 118ml, which is just under 8 tablespoons, so there's about 40mcg in there. That's 1mcg per 97.35ml.

What I can't get is how to convert from the units of mass to the units of volume. 1ml of water weighs 1gm, but I don't know how to parallel your colloidal silver, which won't weigh the same as water.

ppm doesn't depend on the total quantity - it's the dilution, which will remain the same no matter how much you take, although of course the absolute quantity would go up.

OK, I've not got you an answer, but I think I've reached the impasse that tells you why you're having problems. There is a piece of information missing, which is the mass/volume correspondence. Without that, I can't see how to complete my working.

Why in god's name are you wanting to take this toxic stuff, anyway?

EDIT: HANG ABOUT!! There is nothing, but nothing, homeopathic about what you're proposing!! Firstly, homeopathy is about the very careful matching of the symptoms of the whole person to the 'picture' of the remedy substance - NOT something one takes in a routinist way. Secondly, the remedies that homeopaths use are diluted in a very specific way and vastly more diluted than what you're proposing here.

You may have very good reasons for wanting to take colloidal silver in these toxic quantities, but I urge you to find a qualified and experienced practitioner of whatever it is (and that isn't homeopathy) to decide on the dose etc from their experience. I'd gone into this as an arithmetic exercise with some unit challenges, but this is about your health. Please, please, I'm reasonably good at working arithmetic stuff out, and if I can't find a way through this, and you don't know a way, you are running the risk of poisoning yourself.

A good homeopath, a good medical herbalist, a good Chinese medicine practitioner (none of whom use colloidal silver to the best of my knowledge) might all be able to help you significantly. But this isn't a game. Don't mess with your body and mind when you don't have the knowledge, please.

PS I don't disagree with you about the difficulty of conventional medicine or the power of the pharmaceutical companies and the fact that it's not all a nice pure relationship between pharma, medics, researchers and government. But that doesn't mean that anything whatsoever else is good!! I slate the pharmaceutical companies along with the next person, but for goodness sake, they've produced some hugely helpful stuff (I might not be here without antibiotics); the underlying principles which the medical profession is stuck with seems to have considerable flaws, but I'd never, ever want to get rid of their skills, particularly in life-threatening conditions. It's CRUCIAL that you get some well-qualified assistance. Are you in the USA? Find a decent homeopath through NASH at http://www.homeopathy.org/ , or something where the knowledge and experience can be known and regulated.

... Dart, that totally isn't medicine. You know I care about you and your health, so do some research before you harm yourself with this please.

You will be poisoning your body, not helping. Our bodies don't react well to unnecessary metals. They certainly don't react to unreactive metals. There is no way this will effect you in a positive way, your body will just store the silver as it has no way of filtering it out.

There are no legitimate medical uses for colloidal silver and no evidence to support its marketing claims. Given the associated safety risks, most health authorities in the WORLD have concluded that "efforts should be made to curb the illegal availability of colloidal silver products, which is a significant public health issue"

Silver is not an essential mineral in humans; there is no dietary requirement for silver, and no such thing as a silver "deficiency"

Currently, there are no evidence-based medical uses for ingested colloidal silver. There are no clinical studies in humans demonstrating effectiveness, and several reports of toxicity.

The U.S. National Center for Complementary and Alternative Medicine has issued an advisory indicating that the marketing claims made about colloidal silver are scientifically unsupported, and that the silver content of marketed supplements varies widely and can pose risks to the consumer.

The reason you shouldn't administer drugs to yourself is there is NO WAY of effectivly administering the correct dose. Even doctors make mistakes. See a doctor ( a REAL one) for the dosage if you really want to go ahead with this. It's not a good idea.

Get real meds, please, for me?