Dan Dale Alexander (July 18, 1919 – June 15, 1990) was an American nutrition influencer, famous for his eccentric beliefs about cod liver oil curing arthritis.

He was educated at Norwich Free Academy, Trinity College and Columbia University but failed to obtain any degree as he dropped out.

[4] Alexander's statements about cod liver oil curing arthritis have been described by the Federal Trade Commission and medical health experts as deceptive, false, misleading and quackery.

[4][5][6][7] The Arthritis and Rheumatism Foundation complained that Alexander's statements were false advertising and unsupported by scientific evidence.

Moreover, dietary oils can't reach the joints intact because they are broken down into simple substances by the digestive process.