One reason some may want to take it.
"It May Improve Blood Sugar
In healthy people, the hormone insulin has an important role in signaling the body to bring blood sugar into the cells of the body.
In people with diabetes, there are problems with the body’s normal response to insulin.
Several studies have indicated that taking chromium supplements can improve blood sugar for those with diabetes (7Trusted Source, 8Trusted Source).
One study found that 16 weeks of 200 μg/day of chromium was able to lower blood sugar and insulin while improving the body’s response to insulin (8Trusted Source).
Other research has shown that those with higher blood sugar and lower insulin sensitivity may respond better to chromium supplements (9Trusted Source, 10Trusted Source).
Additionally, in a large study of over 62,000 adults, the likelihood of having diabetes was 27% lower in those who took dietary supplements containing chromium (11Trusted Source).
However, other studies of three or more months of chromium supplementation have not shown improved blood sugar in adults with type 2 diabetes (12Trusted Source).
What’s more, research in obese adults without diabetes found that 1,000 μg/day of chromium picolinate did not improve the body’s response to insulin (13Trusted Source).
In fact, a large examination of 425 healthy people found that chromium supplements did not alter sugar or insulin levels (14Trusted Source).
Overall, some benefits of taking these supplements have been seen in those with diabetes but not in every instance."
https://www.healthline.com/nutrition/chromium-picolinate