This is labeled incorrectly. It is not 600mgs per serving !
One serving is 2 Gummies which equals 100mg of Magnesium.
Read the label.
Hi there. These are being obtained from Amazon inventory so we don’t have a lot of information. Here it is on Amazon. There may be more information there.
Unfortunately there wasn’t. This reeks of bait-and-switch !
Your complaint needs to go to the Inner Brightness company. 
I had bought these and i’m loving them so I actually doubled back to see if woot had them any longer, and if not, to get the info to find them on amazon. saw your comment here and thought I’d paste one of the reviews i saw on amazon in which the company explained the issue you are describing:
[Update]: I finally received an email from the company clarifying the magnesium content:
“The “600mg Magnesium Glycinate” on the label refers to the total amount of the magnesium glycinate compound present per serving. Magnesium glycinate is a form of magnesium bound to the amino acid glycine. The “100mg” under “Amount Per Serving” refers to the actual amount of elemental magnesium in each serving. This means that within the 600mg of magnesium glycinate, there is 100mg of pure magnesium. Additionally, while the daily recommended intake (RDA) of magnesium for adults is around 400mg, we generally do not recommend relying solely on supplements to meet this requirement. A well-balanced diet already provides magnesium through sources like leafy greens, nuts, seeds, and whole grains. Our gummies are designed to provide a gentle and effective supplement to support your daily intake, rather than replace dietary sources.”
Original Review: The bottle states that there are 600mg of magnesium glycinate per serving. But then under “Supplement Facts” it says there are only 100mg of total magnesium per serving. I tried contacting the company by email on their webpage, but they never responded to my request for clarification.