Table 2.

Zero-Carb Diet Definition.

Themes	Illustrative Quotes
Meat first	“Beef rib eye steak every day…Occasionally a few seared shrimps, scallops or oysters with it. Raw beef liver weekly. Sushi twice a month or so including salmon, yellow tail, squid. Biltong made from beef chuck and salt for travel or lunch at work. Water to drink. Very occasional fizzy mineral water but mostly flat well water. Salt. Bone broth every evening home made with a pressure cooker from beef feet and home grown chicken. Served with salt and a tablespoon of collagen powder. Oysters on the half shell about once a month” (P1, female, aged 55, USA).
	“…Rarely, I eat strawberries, raspberries and blueberries. I occasionally eat a couple of squares of dark chocolate as a treat…” (P2, female, aged 49, UK).
Idiosyncratic eating	“I eat one-meal-a-day (OMAD) at least 4 days per week. Only eating when hungry and sometimes fasting for 48 h” (P3, male, aged 34, Germany).
	“Breakfast: Beef liver (about 300 g), grilled with butter; glass of cold-brew coffee. Lunch: Beef sirloin steak (about 300 g), fried in butter; glass of water. Dinner: Beef sirloin steak (about 300 g), fried in butter; glass of water” (P4, male, aged 42, New Zealand).
Slowly meeting meat	“The first 2 years were mostly revolving around the so called “classical bodybuilding” diet…I slowly veered away from lean meats and went…towards a ketogenic diet. Since February 2019, I have been on a Carnivore Diet, removing ALL fiber...” (P5, male, aged 32, Greece).

Note. p = Participant.