Protein Part 2 · Shakes, Yogurt, Leucine and the Gurus

The follow up to the big debate. This time we look at the products, the powders, the hype, and the commercial interests behind the advice.

In part one we looked at the Gardner and Layman conflict, the RDA, and the emerging scientific consensus. Now we go deeper into the practical side. What are people actually buying? Is Greek yogurt as special as the wellness crowd claims? Are protein powders regulated properly? And why is leucine suddenly the most talked about amino acid in nutrition?

Some of you asked for my own viewpoint after the first article. I have added that at the end of this part two. It is my opinion only, based on what we currently know and what the evidence is pointing toward.

🥛 Greek Yogurt vs Protein Shakes

Let us start with the numbers, because they expose how marketing often outpaces science.

The calcium surprise: Regular yogurt actually wins on calcium. Because calcium is largely water soluble and stays in the whey, it gets poured off during straining. So Greek yogurt is the better protein choice, but regular yogurt is the better bone building choice if calcium is your priority.

Where the Greek yogurt hype is valid:

• Protein convenience: Getting 15 to 20g of protein in a creamy, spoonable form that tastes like dessert is genuinely useful. It is an easy swap for people who do not want to drink a protein shake or cook chicken breast.
• Satiety and weight management: The high protein content slows digestion, which can help curb cravings and reduce overall calorie intake.
• Research model: Because Greek yogurt has a very consistent microbial and nutritional composition, scientists often use it as a standard model to study how fermented dairy affects gut health. This does not mean it is superior to all other yogurts, just that it is easier to study.

Where the hype gets overblown:

• It is not a superfood for gut health specifically. The research on probiotics applies to yogurt in general, not Greek yogurt exclusively. Some studies even suggest Greek yogurt may have more probiotics because of its concentration, but the evidence is not definitive enough to claim it blows regular yogurt out of the water.

📋 Regulation: The Wild West Across Jurisdictions

This is where things get genuinely concerning. Protein powders are not regulated the way most people assume.

European Union

Protein powders fall under food supplements governed by Directive 2002/46/EC. They are regulated as food, not medicine. This means:

• No pre market approval required before going on sale.
• The manufacturer is responsible for safety, but nobody checks before it hits shelves.
• Health claims must be authorized by EFSA, but enforcement is inconsistent.
• Novel protein sources like rapeseed or water lentil protein do require EFSA safety assessment.

United States

Dietary supplements are regulated under DSHEA 1994. This is even looser:

• No pre market safety or efficacy review.
• The FDA can only act after a product causes harm.
• Label claims about structure and function do not require FDA approval.
• Third party testing like NSF or Informed Sport is voluntary.

United Kingdom

Post Brexit, the situation mirrors the EU framework but with its own enforcement quirks. The Food Standards Agency oversees supplements, but again, it is post market surveillance.

👑 The Leucine Obsession: Where the Science Gets Interesting

Leucine is the current king of amino acids. This is where the Gardner and Layman debate becomes most concrete.

Leucine is the trigger for muscle protein synthesis. It acts as a molecular signal, activating the mTOR pathway that tells your body to build muscle. Without adequate leucine, you do not get the anabolic response, regardless of how much total protein you eat.

The plant protein problem is real, but nuanced. Plant proteins generally contain less leucine per gram than animal proteins. A serving of lentils or rice will not deliver the same leucine pulse as whey or beef. This is why Layman argues that vegetarians and vegans may need more total protein to achieve the same anabolic signal.

But Gardner's counter holds weight: If you eat enough total plant protein, you will eventually get enough leucine. The question is whether enough is realistic for most people, especially older adults with anabolic resistance. Research suggests that overcoming anabolic resistance in aging muscle may require per meal protein doses of at least 0.4g per kg, with optimized leucine content. That is a tall order for a lentil salad.

Where Layman and Gardner stand on this:

• Layman: Leucine is the limiting factor. Plant proteins are inferior for muscle because they deliver less leucine per gram. Higher total protein intakes are needed on plant based diets to compensate.
• Gardner: Total protein intake matters more than leucine timing or source. Well planned plant based diets can meet all amino acid needs, including leucine, if total intake is adequate.

💰 The Layman and Lyon Commercial Complex

You asked me to figure this out. Here is the straightforward answer.

Donald Layman is a respected scientist with real research credentials. His work on protein metabolism, leucine signaling, and the flaws of nitrogen balance methodology is legitimate and has influenced the field.

He also has commercial interests. Layman works closely with Dr. Gabrielle Lyon, who has built a brand around muscle centric medicine and sells supplements, courses, and books. Layman has been her mentor for two decades. Lyon's podcast regularly features Layman, and they co promote each other's work.

Does this invalidate their science? No. But it does mean you should read their claims with appropriate skepticism. When someone sells protein supplements and argues that most people are protein deficient and positions themselves as the authority who can fix that deficiency, you should notice the circularity.

Gardner has his own biases. He is a leading voice in plant based nutrition, with a clear ideological and professional investment in demonstrating that plant based diets are adequate. That does not make him wrong, but it is the same category of interest.

🧓 Anabolic Resistance: The Real Issue for Older Adults

This is where I think the debate finds its most legitimate ground.

Aging muscle becomes resistant to anabolic signals. This is well documented. Older adults need more protein per meal to trigger the same muscle building response as younger people. This is not marketing fluff. It is physiology.

But more does not mean 2.2g per kg for everyone. The research suggests older adults benefit from 1.2 to 1.6g per kg per day, with per meal doses around 0.4g per kg. For a 70kg older adult, that is roughly 84 to 112g of protein per day, spread across meals. That is achievable with food, but it takes deliberate effort.

The 2.2g per kg claims are for athletes and extreme cases. Very few older adults need that much. The gurus who push this number for everyone are exaggerating, often to sell products.

Stuart Phillips: The scientist who changed his mind. Phillips is one of the most cited researchers in muscle protein metabolism. He used to be a strong defender of the RDA. He now advocates for 1.2 to 1.6g per kg for adults, acknowledging that his earlier messaging likely understated needs.

Why does this matter? Because Phillips has no significant commercial interest in protein supplements. His shift represents genuine scientific evolution, not marketing. When a scientist with no product to sell changes his position based on new evidence, that is the kind of signal you should pay attention to.

💡 My Own Viewpoint: You Asked, So Here It Is

Some of you asked me for my own viewpoint after part one. So there you have it. Here it is, my own viewpoint based on what we currently know and what the evidence is pointing toward. This is my opinion only. Remember the choice is yours. I would just suggest to take it carefully and where possible base it on your very own individual needs, lifestyle, and position in life.

On protein shakes: They are convenient, often overpriced, and frequently contaminated with unnecessary additives. Greek yogurt, cottage cheese, eggs, fish, and lean meat are better options for most people. If you use powders, buy from brands with third party testing and read the label carefully.

On the RDA: 0.8g per kg is a floor, not an optimal target. The evidence supports 1.2 to 1.6g per kg for most adults who want to preserve muscle and metabolic health, especially as they age. The new dietary guidelines reflect this shift.

On plant versus animal protein: Both can work. Plant based diets require more attention to total protein intake and leucine content, especially for older adults. The incomplete protein myth is dead, but the leucine gap is real.

On the gurus: Layman's science is solid, but his commercial ties create a conflict of interest. Gardner's science is solid, but his ideological commitments create a different kind of bias. Phillips is the most trustworthy voice in this debate because he has no product to sell and has demonstrated willingness to update his views.

On the shake craze: It is a solution in search of a problem for most people. The fitness industry has convinced a generation that they need protein powder to be healthy. They do not. They need adequate total protein from whole foods, resistance training, and patience.

The emerging view: The conversation is moving away from how much protein and toward what package that protein comes in. A lentil gives you protein plus fiber plus micronutrients. A steak gives you protein plus saturated fat plus B12. A protein shake gives you protein plus whatever the manufacturer decided to put in it. The food matrix matters more than the gram count.

For older adults: The anabolic resistance research is legitimate. Higher protein intakes within the 1.2 to 1.6g per kg range are probably beneficial. But this should come from food first, with supplements as a convenience, not a foundation.

For everyone else: Eat enough protein. Lift weights. Do not overthink it. And be skeptical of anyone selling you a powder while telling you that food is not enough.

📚 Summary Table: Part 2 at a Glance

This table condenses the practical takeaways from this follow up article. Use it as a quick reference.

Ultimately, the protein conversation is maturing. The shouting match between plant based adequacy and higher protein for metabolic health is giving way to a more sophisticated understanding. Your needs depend on your age, your activity, your health status, and your goals. There is no single answer. There is only your answer and your choice.