When we went to a waterfall, we will feel refresh and energetic after awhile. This is because waterfall generates abundant of negative ions. We breath in these bountiful of negative ions and we feel refresh!
Negative ions are usually found in abundant where nature is unspolt; like near a waterfall, a rainforest, caves, seaside, high mountains, after thunderstorms, etc.
The following are examples of places that generates negative ions and the approximate amount (per C.C).
1) waterfalls = about 25000 - 100,000
2) caves = about 5000 - 20,000
3) mountains = 700 - 5000
4) countryside = 700 - 2000
5) Industrial city = 250 - 750
6) Normal household with window open = 250 - 500
7) Inside airplane = 20 - 250
8) Office building with aircon = 0 -250
9) smoky indoor = 0 - 100

Detox foot patch which contain natural tree extracts also contains abundant of negative ions which is effective is refreshing our body.

Researchs have shown that negative ions help to refresh our tired body and enhance our overall well-being.
It additions, negative ions also helps to:
1) capture heavy metal ions.
2) activate cells, purify the blood, stabilise the nervous system and strengthen the immune system.
3) act as an analgesic to relieve pain, lethagy and also deordorizes out body.
4) improves relaxation and sleep.