A scientific study back in 1990, involved twelve pairs of adult males that were identical twins that had identical genes. The study determined their base metabolic rate and calorie needs. They then overfed them by one thousand calories per day, six days a week for twelve weeks. The mean weight gain for them was 8.1 kg, ranging between 4.3 to 13.3 kg overall across the board for them.
Key Takeaways:
“If we can identify the environmental triggers and selective pressures under which the human genome developed, we’ll have a great road map for engineering our optimal lifestyle.”
http://www.marksdailyapple.com/the-genetics-of-obesity-are-you-destined-to-be-fat/