How Much Protein Do Kids and Teens Need?
Direct answer: Kids 4-8 need about 19g protein/day, kids 9-13 about 34g/day, teens 14-18 about 46-52g/day. Athletic teens can use up to 0.7-1.0g per lb of body weight, matching adult lifter targets. Protein shakes are unnecessary for non-athletic children and a convenience-only tool for teen athletes.
Pediatric protein recommendations are widely misunderstood. Some parents under-feed protein, others over-supplement, and a few buy whey concentrate by the gallon to "support growth" that would happen on a normal mixed diet anyway. The science on this is clear and old. Here is the breakdown.
USDA Pediatric Protein RDA by Age
| Age | Daily protein | g/lb body weight |
|---|---|---|
| 1-3 | ~13g | ~0.5 |
| 4-8 | ~19g | ~0.4 |
| 9-13 | ~34g | ~0.4 |
| Girls 14-18 | ~46g | ~0.36 |
| Boys 14-18 | ~52g | ~0.36 |
These numbers prevent deficiency in a sedentary child. For a kid who plays competitive sport or lifts weights, they are too low.
Athletic Teens: Higher Target
Several youth-sport reviews (Smith-Ryan et al., 2020; ACSM 2020) extend adult lifter math to teen athletes once growth and recovery demands are factored in. The working consensus: athletic teens benefit from 0.7-1.0g per lb of body weight, the same range used for adult lifters.
For a 150 lb 16-year-old who plays football or hockey, that is 105-150g per day. Hitting that on whole food alone means: eggs at breakfast (12g), Greek yogurt snack (15g), chicken sandwich lunch (35g), milk (8g), beef dinner (40g) = 110g. No supplement needed.
When Are Shakes Appropriate for Teens?
Three legitimate cases:
- Post-training recovery when food isn't accessible within 1-2 hours of the session.
- Skinny teen athletes trying to gain mass who cannot eat enough whole food to hit calorie targets.
- Picky eaters who reject high-protein foods and would otherwise miss the RDA. (Address the food relationship with a pediatric dietitian; do not use shakes as a permanent crutch.)
For a teen, a single 20-25g scoop of plain whey concentrate in milk is the safest format. Avoid stim-laden "pre-workout" products and avoid creatine-loaded mass gainers without parental and clinician input.
Brands That Suit Teen Use
If a teen needs a shake, the simplest, lowest-additive options are best. Optimum Nutrition Gold Standard, Dymatize, and Promix all sell single-ingredient whey concentrate or isolate without exotic add-ins. Garden of Life and Orgain offer organic plant options. The Value Score leaderboard ranks these by cost per gram.
What About Protein Bars?
Most adult protein bars contain caffeine, alcohol sugars (erythritol, sorbitol), or stimulants that are not ideal for under-13s. For older teens, the Clif Builders Bar, low-stim variants, and RXBAR are reasonable food-first options.
Red Flags
1. Hormone-laden formulas. Avoid "test boosters," tribulus, ashwagandha-loaded products for teens. Hormonal systems are still maturing.
2. Mass gainers with 1000+ calories. These are sugar-and-starch heavy and rarely needed.
3. "Athletic" protein with caffeine or pre-workout-style ingredients. Caffeine intake from any source should stay below 100mg/day for teens per AAP guidance.
Bottom Line for Parents
For a kid eating eggs, dairy, beans, meat, and fish across the week, the RDA is easy to hit and supplementation is unnecessary. Athletic teens can use protein shakes after training as a convenience tool, but the food-first approach wins on cost, nutrition density, and habit formation. If you are spending more than $40/month on supplements for a teen, you are likely overspending.
See our protein per meal guide for spreading the daily total across the day, and the main daily protein explainer for adult math.