Are there any supplements for muscle relaxation? A friend has neck/back muscles all tight

Magnesium, either citrate or malate.

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"We can judge the heart of a man by his treatment of animals." ~Immanual Kant~

...and potassium.

IIRC, calcium and sodium do contractions, magnesium and potassium do relaxation.

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I'd rather meander for the prevention than race for the cure.

Magnesium oil for transdermal (topical) application.

Magnesium maleate or citrate (try and get 200 mg elemental at the least). Also, potassium and 3 great sources are bananas, orange juice and coconut water.

Cocnut water, bananas and pineapple.

The pineapple is thrown in there, but have never understood why, I guess for taste, and it helps to process the potassium or something...

Don't shoot the messenger, it's just what people have said....

Also good for muscle cramps and relaxation is green tea, I find green tea also helps me relax and it physically helps me relax as well.

If you are looking for an all round mix, you could try that "Happy Camper" stuff that is supposed to alleviate stress, help relaxation and stop muscle cramps all in one... I have no idea what's in it though, however, the box says... "All Natural"....

raw pineapple when eaten by itself acts like an antiinflamatory