To reduce insulin levels, one needs to avoid alot of carbs.

The Zone diet explains this.

If you eat several smaller meals, add in some good fats (like nuts), and less carbs. Protein is good too. Salads with olive oil, etc.

But balancing protein with low glycemic carbs, will help keep blood sugar more normal.

Look at the Boost can and see how much sugar or corn syrup is in it. That would be your culprit. Food with fiber is better than drinking calories.

I have started having a lunch of nuts only, and I don't get hungry all day!

The Zone diet is easy to do, and very good at keeping blood sugar stable.

Most libraries have Dr. Sears' books now. Also available for very little $$ at Amazon.com used.

Enter the Zone is the first one, and the basic best one IMO.

This one book sent me on this path to supplements and prevention of illness over a decade ago. Changed my family and myself, and I ended up HERE!

Most medical doctors only look for elevated sugars.
They don't bother with low.

I looked up Boost... and the regular one-- I assume that is the one you used is 41grams of carbohydrate. 25grams sugar... second ingredient after WATER. Sugar is 1/2 fructose, which with the new research is something all of us should avoid.
This is why you had the hypoglycemic dip.