I have also read reports of people having allergic reactions to MCT oil. So using MCT is no guarantee against allergic reactions in everyone.
That being said, ALL pharmaceutical companies in the world use USP seed oils as carrier oils. A friend in the business sent me this list.
Castor Oil
• Bayer (Germany); Testoviron Depot (Testosterone Enanthate), Primoteston Depot (Testosterone Enanthate), Rimobolan (Methenolone Enanthate/Primobolan) & Nebido (Testosterone Undecanoate).
• Endo Pharmaceuticals (American-Irish); Nebido (Testosterone Undecanoate).
• Norma Hellas S.A. (Greece); Testosterone Enanthate.
• Rotex Medica (Germany); Testosterone Enanthate.
Cottonseed Oil
• Actavis (USA); Testosterone Cypionate.
• American Regent (USA); Testosterone Cypionate.
• CIPLA Pharmaceuticals (India); Testosterone Cypionate.
• Padlock Laboratories / Perrigo (USA); Testosterone Cypionate.
• Pfizer / Hospira (USA); Testosterone Cypionate.
• Pfizer / Pharmacia and Upjohn (USA); Depo-Testosterone (Testosterone Enanthate).
• Rising Pharmaceuticals (USA); Testosterone Cypionate.
• Sun Pharm INDS (USA); Testosterone Cypionate.
• Wilshire Pharmaceuticals (USA); Testosterone Cypionate.
Sesame Oil
• Bausch Health Companies Inc. / Valeant Pharmaceuticals (Canada); Testosterone Cypionate.
• Desma Healthcare / Laboratorio Farmaceutico SIT (Italy); Testovis (Testosterone Propionate), Testex (Testosterone Propionate) & Testex Prolongatum (Testosterone Cypionate).
• Hikma Farmaceutica / West-Ward Pharmaceuticals (UK); Testosterone Enanthate & Testosterone Cypionate.
• Watson Laboratories / Allergan PLC (USA); Testosterone Enanthate & Testosterone Cypionate.
Olive Oil
• Galenika (Serbia); Testosterone Depo (Testosterone Enanthate).
• Q Pharma (Spain); Testex Prolongatum (Testosterone Cypionate) in Ethyl Oleate & Olive Oil.
Arachis Oil
• Aspen Pharmacare (South Africa); Sustanon250 (4 Testosterone Esters) & Deca-Durabolin (Nandrolone Decanoate).
• Jelfa Pharma (Poland); Testosteronum Prolongatum (Testosterone Enanthate)
• Merck Sharp & Dohme (USA); Deca-Durabolin (Nandrolone Decanoate).
• Norma Hellas S.A. (Greece); Nandrolone Decanoate.
• Nexus Pharmaceuticals (USA); Jenasteron (Testosterone Enanthate).
• Organon (Netherlands); Sustanon250 (4 Testosterone Esters) & Deca-Durabolin (Nandrolone Decanoate).
• Searle (India); Testenate-Depot 250 (Testosterone Enanthate).
• Zydus Cadila Healthcare (India); Testoviron Depot (Testosterone Enanthate).