Updated Protein Intake Guidelines: What Changed and Why

Protein Recommendations Have Changed — And It Affects You

If you last checked protein intake recommendations a few years ago, the standard advice was likely 0.8 g/kg of body weight per day. That number, however, reflects the minimum requirement to avoid deficiency — not the optimal amount for physically active people. The past several years have brought significant shifts in how sports nutrition science views protein needs.

What Does the Latest Research Say?

ISSN Position Stand

The International Society of Sports Nutrition (ISSN) published its updated position stand recommending that exercising individuals consume 1.4–2.0 g of protein per kilogram of body weight per day (Jäger et al., 2017). This is substantially more than the general population recommendation of 0.8 g/kg. A similar conclusion was reached by Phillips and Van Loon (2011) in their review, which found that protein intakes of 1.3–1.8 g/kg per day maximize muscle protein synthesis in trained athletes.

Even more recent evidence suggests that intakes up to 2.2 g/kg per day may be beneficial for maximizing fat-free mass, particularly during caloric restriction when muscle preservation becomes critical.

Morton's Meta-Analysis

Morton et al. (2018) conducted a comprehensive meta-analysis covering 49 studies and 1,863 participants. The results clearly showed that protein supplementation alongside resistance training increases fat-free mass compared to placebo. The optimal daily intake was approximately 1.6 g/kg, with diminishing returns beyond that threshold.

EFSA Confirmation

The European Food Safety Authority (EFSA) has confirmed that protein contributes to the growth and maintenance of muscle mass. This is an officially approved health claim (Commission Regulation (EU) No 432/2012 on permitted health claims), based on scientific evidence.

Why Did Recommendations Rise?

Several factors have driven the increase in recommended intakes:

1. Better Measurement Methods Earlier studies relied on nitrogen balance, which tends to underestimate protein needs. Newer research uses the indicator amino acid oxidation (IAAO) technique, which produces more accurate results.

2. Different Target Population There is a wide gap between the minimum requirement (0.8 g/kg) and optimal intake. An active person training 3–5 times per week needs considerably more protein than a sedentary individual.

3. Muscle Preservation With Aging Recent research shows that older adults need relatively more protein to counteract age-related anabolic resistance — a phenomenon where muscles become less responsive to protein's muscle-building signal.

Practical Application

How Much Protein Do You Need?

Here is a straightforward guide based on your goals:

Example for an 80 kg Individual:

• Minimum: 64 g protein per day
• Active trainee: 112–128 g per day
• Muscle building goal: 128–176 g per day
• Fat loss phase: 160–176 g per day

Alongside protein, it's also worth considering creatine for muscle building — one of the most researched, evidence-backed sports supplements, supporting strength and muscle gains during training.

Does Protein Source Matter?

Not all proteins are equal. Animal-based proteins (whey, casein, egg) contain all essential amino acids in optimal proportions. Plant proteins have improved significantly but often require combining different sources for a complete amino acid profile.

Whey protein isolate remains one of the most well-researched and effective protein sources for athletes. Dairy proteins generally offer high biological value and excellent amino acid profiles. In practice, MaxFit.ee's range includes fast-digesting options like Optimum-nutrition Gold Standard 100% Whey 450g Maasikas (EUR 24.90 at the time of writing), a slower-release Optimum-nutrition Gold Standard 100% Casein 924g Šokolaad (EUR 49.90), and an easy-mixing, juice-like Dymatize ISO 100 Hydrolyzed clear whey protein 512g Roheline õun (EUR 29.90) for a quick post-workout protein top-up.

Estonian Context

Estonian dietary guidelines have traditionally been more conservative, but the sports nutrition community is rapidly adapting to international research findings. More Estonian athletes and gym-goers are following ISSN recommendations and adjusting their protein intake accordingly.

The Estonian market has seen a significant expansion in protein supplement options in recent years, offering choices for every budget and preference.

Key Takeaways

• Recommendations have risen: Active individuals are now advised to consume 1.4–2.2 g/kg per day, not the old 0.8 g/kg
• Total daily intake matters most: Overall daily protein consumption is more important than timing
• Quality counts: Sources with complete amino acid profiles are preferred
• Individualize: Your exact needs depend on goals, training load, and age
• Supplements help: Especially for those who struggle to get enough protein from food alone

Dietary supplements are not a substitute for a varied, balanced diet and healthy lifestyle.