At lower doses side effects are not so much of a problem, researchers said.

They usually are started at low doses to avoid side effects.

Again, the side effects can occur, but usually at higher doses.

They later allowed testing to continue but at doses too low to have any effect.

It's found in food, but is also available at high doses by prescription.

These are usually started at very low doses and adjusted as needed.

You may need to start at a lower dose to decrease the risk of side effects.

These drugs are only likely to cause such problems if they have been taken continuously, at high doses, for some months.

Other, less serious side effects may occur although they are not common at appropriate doses.

Now a year later my dog and I are still taking the supplement, though at lower daily doses.