Is 39 too late to pivot to medicine?

Got tired of burning the candle at both ends being a business analyst, making already rich investors richer. Currently no kids, no major liabilities. Average 160k to 180k pa. Thought of switching to medicine. It’s at least a more meaningful way of giving back to society. Is it too late for a 39yo to go back to med school without any medical/ science background? I have a marketing degree, worked corporate jobs in the past 16 years mainly doing marketing and now been doing business analyst for 4 years. Any advise?