I generally recommend supplements based on an individuals personal needs. There are a few companies that produce superior products due to their sourcing and manufacturing standards. The ones I have  researched and recommend include:

1. USANA Health Sciences

For ordering please use ID number: 2391889

2. Health Force Nutritionals

Fabulous raw and organic greens

3.  Natural Vitality

Magnesium or magnesium with calcium for relaxation, stress reduction and deeper sleep.