Sorry Hurdity am totally illiterate when it comes to the internet, but I copied a bit of info below:-
What are they?
Tissue salts, also known as "cell salts" or "biochemistry salts", are the same minerals that are found in rocks and in soil. What's interesting is that they already occur naturally in the human body, which means that an imbalance or lack of certain ones opens the door for illness and disease.
The key, therefore, is to keep the body in balance.
12 basic tissue salts
There are 12 basic tissue salts that can be used on their own, or in recommended combinations, to treat a very wide variety of ailments. They are:
Number 1: Calc fluor - Tissue elasticity restorer
Number 2: Calc phos - Cell restorer
Number 3: Calc sulf - Blood purifier, purulent agent
Number 4: Ferr phos - Anti-inflammatory
Number 5: Kali mur - Detoxifying agent
Number 6: Kali phos - Nerve and brain cell agent
Number 7: Kali sulf - Metabolism, pancreas conditioner
Number 8: Mag phos - Pain and cramp killer
Number 9: Nat mur - Water distributor
Number 10: Nat phos - Acidity neutraliser
Number 11: Nat sulf - Liver cleanser
Number 12: Silicea - Skin and connective tissue conditioner
Who can use them?
One of the major benefits of tissue salts is that they're very safe. They're also very inexpensive. However, as with most health matters, it's always best to check with your health practitioner beforehand.
That said, tissue salts are generally suitable for everyone from babies to diabetics and even animals.