The follow-up during 35 years reported first by Salk , then by Beebe and finally by Page demonstrate the safety and non carcinogenicity of these formulations.

• 通过对比发现了短脂肪链。继索尔克首先发布，后来又有Beebe,最后由佩奇证明了这些配方中的安全性和不可致癌性。