* It naturally occurs in red meat and other animal source foods, but we recommend supplementation to obtain optimal levels of this excellent amino acid. (nowfoods.com)
In fact, what he actually said about animal sourced foods (in this case, milk and beef) in that particular video was that they're not a «good source» of nutrients b / c it isn't possible to get certain nutrients w / o the harmful doses of hormones and saturated fats (not to mention a bunch of other industrial toxins found in animal fat). (nutritionfacts.org)
A diversified diet that includes nutrient - rich fruits and vegetables (and, preferably, animal source foods such as chicken and eggs) is necessary to prevent sight - and life - threatening deficiencies, including vitamin A deficiency. (irri.org)