One word of caution. Magnesium can cause diarrhea, especially the cheaper form you referenced, which is magnesium oxide. Plus I read that magnesium oxide is not as bio-available as other forms of magnesium, such as magnesium glycinate. Losing the nutrients consumed in your food down the toilet from diarrhea would be counterproductive to your muscle gaining goals.

As always, really appreciate you opening our eyes to new studies relevant to overall fitness.

PRO: It increases libido- not complaining.
It sure as heck makes me “want it” everyday- still not complaining.
It produces firmer and harder erections- every bit helps.
It doubles the quantity of jizz produced- swim boys swim
Surely some of that testosterone is put to good use at the gym helping to build muscle.

CONS: Having to cycle off it every other month.
If it did have a direct hit on building muscle, i would look rock hard all day- excuse the pun.
I use the powder not the store bought capsules.