I get lots of muscular cramp in my thighs which can sometimes last up to 5 minutes. What can I do about this?

Magnesium deficiency can contribute muscle cramps so you may find that it helps to increase your intake of magnesium-rich foods such as spinach and nuts and seeds. Our Balance Mineral Drink also contains magnesium and helps to support the muscles and joints so this may be a helpful addition to your diet. Keeping properly hydrated and drinking at least 1.5l of water daily is also recommended.

You may also find my blog 'How to prevent muscle cramps' helpful.
Obliviously I couldn't say for certain why you are getting these symptoms though and it would be advisable to get checked out by a doctor as well.