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Some producers use the term maceration to describe the addition of fruit or herbs to a beer. Maceration in beer is the extraction of flavor-active and colored compounds as well as other constituents of fruits and herbs by soaking them in the beer. The rate at which compounds are extracted during maceration depends on factors such as temperature and pH.
For commercial brewers in the US, any ingredient not on the [https://www.ttb.gov/beer/exempt-ingre.shtml TTB exempt] lists needs to be approved by the TTB regardless of where the beer is sold. When seeking approval, it is helpful to show previous use and scientific articles supporting the safety of consumption of the ingredient being used. For example, if the item is on the [https://www.fda.gov/food/ingredientspackaginglabeling/gras/ucm083022.htm FDA GRAS] list(or potentially FDA approved [https://www.cfsanappsexternal.fda.gov/scripts/fdcc/?cat=FoodIngredientsPackaging&type=basic&search= Food Ingredient and Packaging Inventories]; see also advice from [https://www.facebook.com/groups/MilkTheFunk/posts/4889765437718298/?comment_id=4889893777705464&reply_comment_id=4889906237704218 Andrew Zinn]), then providing this information to the TTB or possibly having the FDA GRAS department work with the TTB for approval can help. See also [https://www.ecfr.gov/cgi-bin/text-idx?c=ecfr&sid=bd3ebd8d0f96086d22829fda14923623&rgn=div5&view=text&node=27:1.0.1.1.20&idno=27#sg27.1.25_153.sg4 ''Formulas for fermented products'' on GPO.gov].
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| [https://en.wikipedia.org/wiki/Dried_lime Persian Lime (loomi/dried lime/black lime)] || || || || ~1 lime per gallon, or less <ref>[https://www.facebook.com/groups/MilkTheFunk/# Conversation with Caroline Whalen Taggart on MTF regarding Persian limes. 12/06/2016.]</ref><ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/1678989055462635/ Tips from various brewers on using black lime on MTF. 05/07/2017.]</ref> || || One quarter added during boil, rest added to secondary for 6-8 weeks (or all added to late boil, or all added to secondary) || [http://www.uprightbrewing.com/uploads/9/1/9/6/9196638/saison_vert_with_label.pdf Upright Brewing Saison Vert].
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| Pineapple || 1.36 - 2 litres per 20 litres of beer (Dole sugarless)<ref>Richard Sigesmund. Private correspondence with Dan Pixley. 10/06/2020.</ref> || || 2 lbs/gal (skins on)<ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/1167993543228858/?comment_id=4676369612391216 Lars Meiner. Milk The Funk Facebook group post about pineapple usage. 06/06/2021.]</ref> || || 1 pineapple/gal <ref name="MTF_Thread"></ref> || 6-8 weeks ||
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| Plum || || || || || 2-3 lbs/gal<ref name="MTF Plum Thread">[https://www.facebook.com/groups/MilkTheFunk/permalink/1406234156071461/ MTF thread about plums, 14-Sept-2016]</ref> || Some prefer shorter contact (1-2 weeks) and higher rate, others suggest longer contact (3+ months) and lower fruiting rates<ref name="MTF Plum Thread"/> || 250g/l (2 lbs/gallon) Tilquin Quetsche (contact time of 4 months)<ref>[https://www.facebook.com/permalink.php?story_fbid=960118040712844&id=124028207655169 Tilquin Facebook Post 22-Sept-15]</ref>
See also:
* [https://www.facebook.com/groups/592560317438853/?multi_permalinks=4867859459908896 MTF thread on how to use pectic enzyme.]
* [https://www.facebook.com/groups/MilkTheFunk/permalink/2395599950468205/ MTF thread on mixing fruit wine with sour beers, which creates a oddly thick protein precipitation effect, possibly due to ellagitannins.]