Your underarms aren’t just another patch of skin - they’re an area with high absorption and close proximity to lymph nodes. Deodorant is something you use daily, often without thinking about it. Ingredients matter here. Keep in mind that some people are sensitive to ingredients like baking soda.
In warm, humid weather, KOSAS outperforms anything I've found. Normally, Primally Pure gets my top deodorant spot, but it starts to not work quite as well in the hot, humid Virginia summer. KOSAS uses AHA to keep the stink away, which makes this a powerhouse in the summer and for "super sweaters". It would likely be too drying or irritating in the cooler, dry months. I prefer fragrance free, but their scented options are non-toxic (I just don't like how they smell)
Tallow based & PP has baking soda options and magnesium based options for those sensitive to baking soda.
This line has some great men's scents & uses magnesium instead of baking soda.
All the deodorants available on Amazon can be found all in one place for price comparisons in my Shop.