Four Sigmatic Promo Codes – Verified Deals & Offers | October 2026

Think Coffee good

Got the Think Coffee. Tastes fine, works well. Fast checkout. Shipping was okay. Will probably order again.

Detailed experience with protein

I decided to try the Sweet Vanilla Mushroom Protein this time. The ordering process was straightforward on their website; I found what I needed quickly. Shipping took about 6 days to get to my address in Florida, which was reasonable. It arrived well-packaged, no leaks or damage to the container. The protein powder itself mixes fairly easily into a shaker bottle with almond milk, though a few small clumps remained sometimes. The vanilla flavor was pleasant and not too overpowering, definitely masked any mushroom taste. I used it after workouts and felt good. Customer service wasn't needed, but the tracking updates were clear. It's a bit pricey compared to regular protein powders, but I think the added mushroom benefits make it worth it for me.

Reliable quality, good value

I've been buying from Four Sigmatic for a while now, usually their Instant Mushroom Coffee. This time I picked up the Mushroom Hot Cacao. Just like my previous orders, the quality was consistent. It mixes easily and has a nice, rich taste. I appreciate that their products always deliver on what they promise. Their subscription model is also a good deal, makes reordering simple and saves some money. They've become my go-to for these kinds of products because I know what I'm getting.

Good product, slow shipping

I ordered the Mushroom Coffee with Lion's Mane. The coffee itself was pretty good; I liked the flavor and felt a subtle focus boost without the jitters. My main issue was the delivery, it took 8 days to reach me in California, which felt a bit long for an online order. The packaging was secure though, no damage. Overall, a solid product but they could speed up their shipping process a little.