At day 60 the guarantee ends. What happens when you stop depends mostly on what you were noticing.
We have no information suggesting a problem from stopping a supplement of this kind, but we cannot promise how you will feel. If you noticed a benefit, it may fade over weeks, if it was there at all. If you did not, nothing changes.
If you take other medication, tell your doctor if you stop or start anything.
Keep logging for a few weeks after stopping and compare with your on-product notes. A clear drop suggests the gummy mattered, and a flat line suggests it did not, or that its effect was too small to see. Either way, you know more than before.