Supplements and vitamins?

I know there’s no ethical quick fix to boost speed and/or endurance without putting the miles in, but have any of you had positive results from any of the multitude of supplements out there?

My diet is pretty good (maybe hitting the coffee a bit too much) but shift work and family stuff doesn’t make for good regular miles, although I rarely get ill, and my weight is moving in the right direction (85kg, just about 6 ft tall, 39 yrs) so my general wellbeing seems ok.

I’m hoping to have the best year of riding and hammer a few of my riding buddies, most of whom are younger, get in more miles, or both.

I’d just like to feel a bit more energetic, and in particular it’d be great to have another gear on the hills – I can grind up ’em at a vaguely respectable pace but can never accelerate on them.

Also, anything that will alleviate the deadness in my legs after a ride and achey calves. I do try to stretch them out when I remember, and either wolf down a can of tuna or a protein bar post-ride.

I was looking at recovery shakes, iron supplements, stuff like that.