That product does not say --delayed release. It costs more than the brand name SlowMag... so why pay more?

SlowMag is quite affordable now at WalMart.
I don't know anything about the Alta product, but it seems a bit expensive to me. Not being delayed release it may be laxative for some people. The delayed actions make for gentler effects for some.

I apply the lotion to my arms. I've been using magnesium supplements for over a decade...to lower my blood pressure, and improve the utilization of essential fatty acids. Magnesium dilates blood vessels and improves circulation too. I get leg cramps if I don't use it.

It doesn't matter where you apply the lotion...the mag goes thru the skin. If your feet have poor circulation, you might apply to the tops of them and the calves. Applied at night really helps with relaxation and sleep too.