help please ladies...

Gemm💖 • Met my 💝 01/01/2011, 💍 1/02/2012, Bought our first 🏠 01/06/2015. 👼 baby 17/08/2019. Wifey 🤵🏼‍♂️👰🏻‍♀️14/07/2021 👼19/07/2021 Ttc first baby for 7 years!
So my oh goes to the gym and trains basically every night... my question is the protein he takes does it affect his sperm and fertility? We've been ttc and nothing's happening! I'm so hurt he wants to take this "crap" again! 
He told me it doesn't affect it as people he knows take it and have babies?!