My 17 yo son has purchased: test 600c (testosterone), tren 75 (finabolan), var 10 (anavar) and d-anabol 25 (metandesenolone). dangerous? pls advise

Yes, very!: If your son has "purchased" these anabolic steroids, in all likelihood, he is not under the management of his physician. Excess T from unsupervised use is very dangerous and can increase risk for heart attack, stroke, mood changes, etc. It can also render men infertile as well as shut down T production. Best to see family doc for evaluation. If he truly has low T, need to find cause first.