Typically lenders don't support human collateral because of the lack of legal remedies for repayment, currently.
Humans have been collateralized in the past and so there adequate references into how that can work if you were able to create an OTC financial agreement with a counterparty.
In more favorable regulatory climates, males encounter difficulty generating income from their bodies to support granting you a loan of the amounts you specified, but there are lucrative opportunities for females. Indeed, some of the biggest establishments that exist to support such services were previously debtor's prisons (that offered the same services).
As others have pointed out, selling body parts can be lucrative, and offering services such as surrogacy can also have a high premium on them, but they all have various limitations such as only having one of a body part, or a womb can only be occupied for a client one at a time, making these inadequate for securing a 1 million dollar loan with interest.
Alternatively, unsecured credit can result in substantial amounts of capital at higher interest rates, so this should be considered an option, and you will have to build up your access to capital in a way that makes institutions comfortable giving you credit lines without pledging assets.