I find that I sleep better if I take a capsule containing calcium, magnesium and zinc during the evening. I've discovered that when I do take one, when the sun come up I'm likely to get a little morning wood. No wood at all if I have skipped the capsule the night before.

Has anyone had that experience?

"Zinc is a key mineral that cells use to metabolize nutrients. Immune function, DNA and protein production, and cell division are all related to zinc levels in the body. Zinc also enables the male body to produce testosterone. Because of this, your levels of zinc may affect erectile dysfunction."

I started taking a 30 mg capsule of zinc picolinate every day. What a noticeable difference in my erectile performance! The zinc supports better testosterone levels, according to reports. You can Google such studies.

Apparently many of us men are deficient in zinc, and that leads to a slowdown in sexual prowess – including the ability to get and keep a good erection.  

Why suffer all the cost and acquisition horrors involved with Big Pharma ED meds when you might get a NATURAL boost going for you. I figure these capsules cost me about 10 cents each at the health-foods store.  

check out ZMA....it contains zinc, magnesium, and a B vitamin and it can enhance a gentleman's capabilities.
No guarantee...but some things work for some and not so much for others. Google it. With proper diet and exercise
it's a worth a shot. You take it before bedtime and it can give you some really amazing dreams....and morning wood.
It's been discussed on this board before.

At least one recent study found that men (but not women) who took calcium pills had an increased rate of heart attacks.