Self Employed health Insurance does not go directly on Schedule C so it will not reduce your Net Profit or self employment tax.
If your health ins exceeds your net self-employment income it gets split. An amount equal to your net self-employment income goes on Form 1040 Schedule 1 line 16 and the remainder gets added in to medical expenses on Schedule A.
Where to enter Self Employed Health Ins
https://ttlc.intuit.com/community/entering-importing/help/where-do-i-enter-my-health-insurance-premi...
Can I deduct health ins when Self Employed?
https://ttlc.intuit.com/community/credits-and-deductions/help/can-i-deduct-my-health-insurance-premi...
Deducting Health Ins If you are Self Employed
https://turbotax.intuit.com/tax-tips/home-ownership/deducting-health-insurance-premiums-if-youre-sel...
