A BUNCH of the recent Amazon reviews say their products have been growing mold in the capsules. Buyer beware. This could just be amazon’s attempt to dump a bunch of faulty product.
I came here to say the same thing. Lots of complaints about mold appearing long before the expiration.
According to the description:
“Oxidation can naturally cause black specks on the capsules. This is a normal process when the capsules are exposed to air after you open the package. The capsules are safe to consume and the oxidation will not reduce effectiveness.”
There’s no such thing as a hangover cure, aside from drinking lots of water and taking anti-inflammatories the night before (after your binge). It’s an inflammatory response by the body.
The one product that really works for gas and bloating from beer, though not for hangovers, is Beer Aid. It works the same way Lactaid does (enzymes), so…well…it actually works.
http://www.thebeerexpert.com/beer-aid
It’s on Walmart’s website too, but from the original website you get a freebie for ever one you buy.
i have found b vitamins to be helpful for hangovers, but you don’t need these for that, obviously. i have friends who swear by pedialyte as well. if you use MDMA, take a combo of b vitamins and 5-htp.
also a friendly psa to all the partiers that may do more than drink, remember that fentanyl is in everything now including cocaine and MDMA, not just heroin. you can get free fentanyl test kits, but if you aren’t going to test, know who and where you’re getting stuff from. if it’s a pressed pill, you can look it up online first to get an idea of potency. start small, and have someone who isn’t using there who has and knows how to use narcan. you can get narcan for free. in an emergency, don’t wait, don’t panic, call 911. many states have laws now where if you call 911 in the event of an overdose, you can’t be charged for drug offenses. have fun, be safe, look out for each other. 
If you don’t want a hangover, just don’t sober up! 
Ah… but whose to say that the mold isn’t the cure? 
Indeed the hangover is a withdrawal…just drink 1-2 strong beers in the AM and you will be clear