Best Protein for Older Athletes 2026: 7 Picks Compared

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Saturday morning doubles at 62, the masters swim squad at 6 a.m., a 70-year-old cyclist still rolling out with the club every Sunday, a weekend hiker who just turned 55: older athletes are everywhere, and they’re asking the same question after a session: am I eating enough protein? Finding the best protein for older athletes comes down to a few things: enough protein per serving, a label you can read without a magnifying glass, easy digestion, and third-party testing so you know what’s in the tub. We compared seven real products, mostly NSF Certified for Sport or Informed Choice, by protein, sugar and price per serving.

Prices change often. The prices below are what we saw at the maker or a major retailer in October 2026; check the current price before you buy.

Talk to your doctor or a registered dietitian first: protein needs depend on your health, weight and medications. Expert groups note that people with severe kidney disease may need to limit protein, so if you have kidney problems, diabetes or another condition, ask before adding a protein supplement. Protein powder is food, not medicine. Follow the label.

Our top picks

Protein for older athletes compared

Product	Protein per serving	Type	Testing	About (Oct 2026)	Per serving
Thorne Whey Protein Isolate	21 g	Whey isolate	NSF Certified for Sport	$65 / 30	$2.17
Momentous Essential Whey (Unflavored)	20 g	Whey isolate	NSF Certified for Sport	$60–70 / 25	$2.10–2.80
Transparent Labs Whey Isolate	28 g	Whey isolate	NSF + Informed Choice	$65 / 30	$2.17
Klean Casein	24 g	Micellar casein	NSF Certified for Sport	$68.50 / ~20	~$3.43
ON Gold Standard 100% Casein	24 g	Micellar casein	Informed Choice	$49 / 25 (2 lb)	$1.83–1.97
Garden of Life SPORT Plant	30 g (2 scoops)	Pea and other plants	NSF + Informed Choice	$42 / 19	$2.21
fairlife Core Power Elite	42 g	Milk shake (RTD)	Not certified for sport	$48 / 12 bottles	$4.00

Why protein comes up more after 50

Muscle mass and strength tend to decline gradually with age, and expert groups have looked at what that means for food. The PROT-AGE study group (2013) and an ESPEN expert group (2014) both suggest healthy older adults aim for at least 1.0–1.2 g of protein per kilogram of body weight a day, and PROT-AGE suggests at least 1.2 g/kg for older people who exercise. Both pair that with regular activity, especially strength training. The International Society of Sports Nutrition notes that older people may need larger servings (around 40 g) to get the same muscle-building response from a single meal as younger people, and suggests 700–3,000 mg of leucine per serving. These are general figures from researchers, not a personal plan: a registered dietitian can turn them into one, and most people can get much of their protein from regular food like dairy, fish, eggs, soy and beans, as the U.S. National Institute on Aging suggests.

The best protein for older athletes, one by one

1. Thorne Whey Protein Isolate: best overall

Thorne’s isolate gives 21 g of protein per serving, and the vanilla flavor comes in at about 100 calories and 3 g of sugar (per a retailer listing). Chocolate and vanilla are NSF Certified for Sport. It’s $65 for 30 servings at Thorne, about $2.17 each. It’s a simple, mild powder that mixes in milk, water or a smoothie.

• Good: NSF certified; low sugar; easy flavor to live with every day.
• Watch out: 21 g is mid-range; some people use more than one scoop (check with your dietitian).
• Best for: masters runners, cyclists and tennis players who want one reliable tub.

Check the Thorne Whey Protein Isolate price on Amazon

2. Momentous Essential Whey (Unflavored): easiest to mix into food

Not everyone wants another sweet shake. Momentous’s unflavored isolate has two ingredients (grass-fed whey protein isolate and a digestive enzyme blend called ProHydrolase) and gives 20 g of protein and 90 calories per scoop. That makes it easy to stir into oatmeal, yogurt or soup. The unflavored version is NSF Certified for Sport. It’s 25 servings for about $60 on Amazon or $69.99 at Momentous ($52.49 on subscription).

• Good: short ingredient list; no sweeteners; blends into food.
• Watch out: plain taste on its own; pricier per gram of protein.
• Best for: athletes who’d rather add protein to breakfast than drink a shake.

Check the Momentous Essential Whey price on Amazon

3. Transparent Labs Grass-Fed Whey Isolate: most protein per scoop

At 28 g of protein per scoop, Transparent Labs gives the most protein per serving of any powder here, which helps if you’re aiming for larger servings. It’s NSF Certified for Sport and Informed Choice certified, and costs $64.99 for 30 servings (about $2.17). Carbs are low, about 1–2 g depending on flavor.

• Good: high protein per scoop; two certifications; good price per gram.
• Watch out: sweetened flavors; certification can vary by flavor, so check yours.
• Best for: masters lifters and CrossFit athletes.

Check the Transparent Labs Whey Isolate price on Amazon

4. Klean Athlete Klean Casein: best before bed

Casein is the slower-digesting milk protein, and many older athletes take it in the evening. Klean Casein gives 24 g of protein from micellar casein, about 110 calories, 1 g of sugar and 530 mg of calcium per scoop (chocolate), sweetened with stevia and monk fruit. It’s NSF Certified for Sport. A tub of about 20 servings is $68.50, around $3.43 a serving, the priciest powder here.

• Good: NSF certified; thick, pudding-like texture; calcium on the label.
• Watch out: expensive; fewer servings per tub.
• Best for: an evening shake for drug-tested masters athletes.

Check the Klean Casein price on Amazon

5. Optimum Nutrition Gold Standard 100% Casein: best value casein

The same slow-digesting micellar casein for a lot less money. Each scoop gives 24 g of protein and, according to ON, 9 g of naturally occurring essential amino acids, with 1–2 g of sugar depending on flavor. The 2 lb tub (25 servings) was about $49 on Amazon, and the big 53-serving tub is $97.49 at ON (about $1.83 a serving). It’s on the Informed Choice certified list, not NSF’s.

• Good: lowest cost per serving here; widely sold; Informed Choice.
• Watch out: not NSF certified; thick when mixed with little liquid.
• Best for: budget-minded athletes who want a nightly shake.

Check the ON Gold Standard Casein price on Amazon

6. Garden of Life SPORT Plant-Based Protein: best dairy-free

For athletes who avoid dairy, Garden of Life’s organic plant protein gives 30 g of protein per two-scoop serving, with about 180 calories, 8 g of carbs and 2 g of sugar (chocolate). It’s NSF Certified for Sport and Informed Choice. Vitacost lists 19 servings for $41.99, about $2.21 each.

• Good: dairy-free; organic; two certifications; plenty of protein per serving.
• Watch out: two scoops per serving; earthier taste than whey.
• Best for: lactose-intolerant or plant-based athletes.

Check the Garden of Life SPORT Protein price on Amazon

7. fairlife Core Power Elite 42g: best ready to drink

Sometimes the easiest protein is a cold bottle from the cooler after golf or a long ride. Core Power Elite is a shake made from ultra-filtered, lactose-free milk: 42 g of protein, 230 calories, 7 g of sugar (no added sugar), 260 mg of sodium and 900 mg of calcium in a 14 oz bottle (chocolate). It’s sweetened with monk fruit, stevia, acesulfame K and sucralose. A 12-pack was about $48 on Amazon, about $4 a bottle. It is not third-party certified for sport, so drug-tested athletes should skip it. The smaller Core Power has 26 g of protein.

• Good: no mixing; big protein serving; lactose-free milk.
• Watch out: not certified for sport; highest cost per serving; artificial sweeteners.
• Best for: recreational athletes who want protein on the go.

Check the Core Power Elite price on Amazon

How to choose a protein after 50

• Food first. Powder fills gaps. Dairy, fish, eggs, soy and beans cover a lot of protein for most people.
• Look at protein per serving. Here it runs from 20 g to 42 g. Compare the label to what your dietitian suggests per meal.
• Pick a format you’ll actually use. Unflavored powder for food, flavored for shakes, casein for evenings, ready-to-drink for the car.
• Check sugar and sweeteners. Most picks here have 1–3 g of sugar; plant and RTD options have a little more. If you watch blood sugar, read every label.
• Choose tested products. NSF Certified for Sport and Informed Choice look for banned substances and check the label; look up your exact flavor.

Protein works best alongside strength training and good recovery. See our full best protein powder for athletes guide, best creatine, best joint supplements for athletes and recovery tools for runners over 50, or browse the Protein section.

Protein questions from older athletes

Do older athletes need more protein than younger ones?

Expert groups like PROT-AGE and ESPEN suggest older adults need more than the general adult minimum, and the ISSN notes older muscles may need larger servings for the same response. How much is right for you depends on your health and training, so ask a registered dietitian.

Whey, casein or plant protein?

Whey digests quickly and is popular after training; casein digests slowly and many people take it in the evening; plant blends suit dairy-free diets. All three can fit; choose by taste, digestion and diet.

Is protein powder safe for my kidneys?

The PROT-AGE group notes that people with severe kidney disease may need to limit protein. If you have any kidney problem, or take medication, check with your doctor before using protein supplements.

Are protein shakes from the supermarket OK?

Many are fine as food, but most aren’t third-party certified for sport. If you compete in drug-tested masters events, choose an NSF Certified for Sport or Informed product.

Should I take creatine too?

Many older lifters do; creatine is one of the most studied supplements. It’s a separate decision to make with your doctor; see our creatine guide for tested options.