High-Protein Foods: 30 Best Protein Sources for Athletes

High-Protein Foods: 30 Best Protein Sources for Athletes

If you train regularly, protein is the cornerstone of your nutrition. It is not just muscle-building material — protein plays essential roles in immune function, enzyme production, and hormone synthesis. Yet many active people do not know exactly how much protein they actually consume or which sources deliver the best results.

This guide is for athletes and active individuals who want to optimize their diet for protein. After reading, you will know which foods to prioritize, how much protein you actually need, and when supplements make sense.

TL;DR

• Daily protein target: 1.6-2.2 g/kg body weight for training individuals (Morton et al., 2018)
• Best animal sources: chicken, turkey, eggs, salmon, cottage cheese
• Best plant sources: lentils, chickpeas, tofu, tempeh, hemp
• Digestibility matters: DIAAS score shows how well protein actually absorbs
• Timing matters: 20-40 g protein per meal optimizes muscle protein synthesis (Schoenfeld & Aragon, 2018)
• Supplements complement, not replace: protein powder is convenient, but whole food protein is always preferred

Why Protein Matters So Much for Athletes

Protein is made of amino acids, 9 of which are essential — your body cannot produce them on its own. During training, muscle fibers sustain microdamage, and protein provides the raw materials for repair and growth. Insufficient protein intake means slower recovery, higher injury risk, and worse performance.

A meta-analysis of 49 studies by Morton et al. (2018) found that the optimal protein intake for training individuals is 1.6 g/kg per day, with benefits plateauing around 2.2 g/kg. For an 80 kg man, that translates to 128-176 g of protein daily.

The 30 Best High-Protein Foods

Animal-Based Sources

Plant-Based Sources

Protein Digestibility: Why DIAAS Matters

Not all protein is equal. DIAAS (Digestible Indispensable Amino Acid Score) is the FAO-recommended standard that measures how well the amino acids from a specific food actually absorb (FAO, 2013). A score above 1.0 indicates excellent digestibility.

Animal protein generally scores higher (0.9-1.14), while plant protein ranges from 0.5-0.9. This does not mean plant protein is bad — it just means you need to eat slightly more and combine different sources.

Practical tip: Combine rice + beans = complete amino acid profile. The same applies to bread and hummus.

How Much Protein Per Meal

Schoenfeld and Aragon (2018) found that to optimize muscle protein synthesis, you should consume 0.4-0.55 g/kg body weight per meal, spread across 3-4 meals per day.

Practical example for an 80 kg athlete:

When Protein Powder Makes Sense

Whole food protein is always preferred, but there are situations where a supplement is practical:

1. Post-workout — whey absorbs quickly (Pennings et al., 2011)
2. Traveling — powder is portable and needs no refrigeration
3. High protein needs — above 2 g/kg is difficult from food alone
4. Plant-based diets — pea protein helps close the leucine gap
5. Weight loss — protein powder is a low-calorie protein source

MaxFit offers both whey proteins and plant-based proteins to suit different needs.

Common Mistakes With High-Protein Diets

1. Loading all protein into one meal — Your body can effectively use 20-40 g per sitting. Spread it evenly across the day.
2. Eating only meat — Dairy, eggs, and legumes are equally excellent sources.
3. Ignoring plant protein — A well-combined plant diet can cover all requirements.
4. Overlooking digestibility — 100 g of spirulina protein on paper does not mean 100 g of absorbed protein.
5. Forgetting water — Higher protein intake requires more hydration (Cuenca-Sanchez et al., 2015).

Frequently Asked Questions

Does too much protein damage kidneys?

In healthy individuals, there is no evidence that high protein intake (up to 3.5 g/kg) harms kidney function (Antonio et al., 2016). If you have existing kidney disease, consult your doctor.

Is plant protein enough for building muscle?

Yes, provided the quantity is sufficient and sources are varied. Heusser et al. (2022) found no significant difference in muscle growth between plant and animal protein when total intake was matched.

How much protein should female athletes eat?

The same recommendation applies: 1.6-2.2 g/kg. Women often need to pay extra attention to iron and calcium alongside a high-protein diet.

Is protein before bed a good idea?

Yes. Res et al. (2012) found that 40 g of casein before sleep increased overnight muscle protein synthesis by 22%. Cottage cheese or casein powder are good choices.

Any tips for storing high-protein meal prep?

Cooked chicken breast keeps in the fridge for 3-4 days. Cooked legumes freeze well in portion containers. Hard-boiled eggs last a week refrigerated.

Estonia-Specific Context

Estonian food culture actually contains many excellent protein sources: kohupiim (curd), kodujuust (cottage cheese), hapukoor (sour cream), and black bread with legumes. Prisma and Selver stock most of the foods mentioned in this guide. Chicken breast costs around EUR 7-9/kg in Estonia, making it one of the most affordable protein sources.

In winter, when fresh fish selection is limited, canned tuna and salmon are solid alternatives. The Estonian fish market also offers rainbow trout and Baltic herring, which are cheaper than imported fish.

References

• Morton, R.W., Murphy, K.T., McKellar, S.R., et al. (2018). A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. British Journal of Sports Medicine, 52(6), 376-384.
• Schoenfeld, B.J. & Aragon, A.A. (2018). How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution. Journal of the International Society of Sports Nutrition, 15, 10.
• FAO (2013). Dietary protein quality evaluation in human nutrition. FAO Food and Nutrition Paper 92.
• Pennings, B., Boirie, Y., Senden, J.M., et al. (2011). Whey protein stimulates postprandial muscle protein accretion more effectively than do casein and casein hydrolysate in older men. American Journal of Clinical Nutrition, 93(5), 997-1005.
• Res, P.T., Groen, B., Pennings, B., et al. (2012). Protein ingestion before sleep improves postexercise overnight recovery. Medicine & Science in Sports & Exercise, 44(8), 1560-1569.
• Antonio, J., Ellerbroek, A., Silver, T., et al. (2016). A high protein diet has no harmful effects: a one-year crossover study in resistance-trained males. Journal of Nutrition and Metabolism, 2016, 9104792.
• Heusser, P., Monteyne, A.J., Whelehan, G., et al. (2022). Mycoprotein as a possible whole food source for delivering equivalent muscle anabolic response as animal protein. Frontiers in Nutrition, 9, 1043739.
• Cuenca-Sanchez, M., Navas-Carrillo, D. & Orenes-Pinero, E. (2015). Controversies surrounding high-protein diet intake: satiating effect and kidney and bone health. Advances in Nutrition, 6(3), 260-266.

See also our protein powder guide and plant protein overview.

Browse MaxFit protein products →

See also:

• Vadaku Pulber: Complete Guide 2026
• Valgupulber Müük: Complete Guide 2026
• HMB Supplement: Evidence-Based Guide to Muscle Protection