Weird.
I thought this was a fine supplement for GERD, with lots of good reviews.
Anyway, they stopped making it.
I emailed them and asked why and they said due to low sales.
Ok.
Limonene only seems to be available now from a few places:
1) orange burps - $44 for two 40 pill bottles... 500mg each (this is from the manufacturer, may be more or less elsewhere)
2) D-Limonene by Integrative Therapeutics - $39.99 for 10 1,000mg pills (this is EXPENSIVE, but technically a protocol is 1,000mg EOD for 20 days).
3) D-Limonene by Swanson - 250mg per capsule so you may need 4 at a time if you're doing 1,000mg doses.