In general Stone Age people consumed more protein and ate less carbohydrate than most humans do today, with fat intake probably about the same level; although this was a balanced blend of fatty acids (Omega-3: Omega-6) and relatively high levels of MUFA and PUFA, rather than today's focus on Omega-6, consequently Stone Age people were mainly free of the signs and symptoms of cardiovascular disease (CVD).
Starch came from sources including grain, nuts and sea beet (the ancestor of beetroot and sugar beet) and evidence from Grotte des Pigeons cave in northern Morocco, indicates that extensive snacking on acorns and pine nuts may have led to some tooth decay. Analyses of the chemicals in Ötzi's hair suggests that meat may have made up between 10%-30% of the Iceman's diet.
Wild animal species (such as wild boar and horse) were leaner compared to their modern-day domesticated equivalents, so much of the fat the Stone Age people ate came from marine mammals, fatty fish and nuts.
Snails where consumed at least 150,000 years ago, with evidence from the Haua Fteah cave (Libya) that indicates early humans used stone ‘drills’ or thorns to extract the molluscs from their shells.
Meadowlands and forest edges were filled with many edible wild plants, such as lilies and onions.
The bulbs of these plants are very nutritious, but their energy is locked up in a dense, indigestible carbohydrate called inulin.
The fish remains were found in an ancient cooking hearth in a residential structure at the Upward Sun River site near the Tanana River located east of Fairbanks.
Analysis of food materials recovered from the stone included acorns and relatives of millet and wild Avena (oat) species.
Farming during the Neolithic in Northern Europe was mostly einkorn () cultivated in Southwest Europe.
Hanging on three lianas (thin vines or ropes probably made of esparto grass which grows abundantly in the area) he/she is picking up honeycombs, while nearby are some stylised bees.
Slung over his/her shoulder is a basket or gourd to harvest the honey.