Free foods are very limited on the traditional ketogenic diets and fluid is not restricted but an adequate intake encouraged to reduce risk of kidney stones. (matthewsfriends.org)
Several supplements have been linked with an increase in certain cancers, for example, while others have been tied to an elevated risk of kidney stones. (businessinsider.com)
Some studies have found that higher intakes of calcium from dietary supplements are linked to a greater risk of kidney stones, especially among older adults. (ods.od.nih.gov)