Teen Athlete Foundation protocol

Teen Athlete Foundation

kidsmoderate evidence

About this protocol

Teen athletes (high school sports, club teams, intensive training) have specific nutritional demands during growth + heavy training. The most-common gaps: iron (especially in female athletes — menstrual losses plus training losses), magnesium (under-consumed at all ages), omega-3 DHA (kids who don''t eat fish), and adequate vitamin D. This protocol covers those evidence-backed gaps. Creatine is included with a clear caveat — the safety data in adolescents is reassuring for ages 14+ when used appropriately, but it requires honest parent + athlete + coach + pediatrician conversation. CRITICAL FRAMING: - Teen sports nutrition is mostly about FOOD, not supplements. Adequate calories (often UNDER-consumed by young athletes), protein, carbs around training, hydration, and sleep all matter more than the supplement stack. - This protocol is for ages 14-18 (older adolescents). Younger children with intensive training should be evaluated by pediatric sports medicine. - NEVER use adult pre-workout, fat-burner, or testosterone-boosting products in teens. These are explicitly inappropriate and sometimes dangerous. - Coordinate ALL supplementation with the teen''s pediatrician, especially during growth spurts.

Where to start

Step 1: Address food first. Most teen athlete problems trace back to inadequate caloric intake. A serious training schedule plus growth needs significantly more calories than sedentary teens. Track food for a week to establish baseline.

Step 2: Get baseline labs: ferritin, CBC, 25-OH vitamin D, B12. Female teen athletes are particularly at risk for low ferritin from combined training losses + menstrual losses.

Foundational supplements:

Iron ONLY if ferritin is confirmed low. Female teen athletes commonly drop below ferritin 30 ng/mL — symptoms include fatigue, exercise intolerance, declining performance. Target ferritin 50+ ng/mL for athletic performance.

Magnesium glycinate at 200-300 mg before bed. Most teens under-consume magnesium; demands rise with intense training.

Omega-3 DHA for kids who don''t eat fatty fish 2-3× weekly. Supports recovery, brain development, and inflammation modulation.

Vitamin D3 at 1000-2000 IU if 25-OH vitamin D is below 30 ng/mL.

Creatine is the optional 5th ingredient — discuss with parent + pediatrician + coach. ISSN position statement supports use in adolescents 14+ when monitored. 3-5 g daily monohydrate. NOT recommended in children under 14.

NEVER use: Adult pre-workouts, fat-burners, ''testosterone boosters,'' weight-loss supplements, prohormones, or anabolic-adjacent products. Many of these are dangerous and some are banned for legitimate athletics anyway.

4 nutrients

Start here

Strongest evidence — the foundation of the stack.

Iron (only if ferritin is confirmed low)

18-65 mg elemental with vitamin C, on empty stomach — only if ferritin < 30 ng/mL
morningempty stomach

Female teen athletes have the highest risk of iron deficiency among adolescents — menstrual losses + training losses + often inadequate intake produce frequent ferritin drops. Iron deficiency without anemia produces fatigue, declining performance, restless legs, and hair shedding. McClung 2014 review supports iron evaluation in female athletes. Test before supplementing; chronic over-supplementation is harmful.[1, 2, 3]

Magnesium Glycinate (Pediatric/Teen Dose)

200-300 mg elemental, before bed
before bedempty stomach

Magnesium supports muscle function, sleep quality, and recovery. Most teens (athlete or not) under-consume magnesium. Intense training increases sweat losses. The glycinate form is gentle on the GI tract and supports sleep — particularly relevant for teen athletes whose sleep often suffers during heavy training blocks.[4, 5]

Add if needed

Add these only if the foundation isn't enough.

Omega-3 DHA

500-1000 mg combined EPA+DHA daily, with breakfast
morningwith food

Omega-3 supports recovery, brain development through late adolescence, inflammation modulation, and cardiovascular health. Teen athletes who don''t eat fatty fish 2-3× weekly are typically low in DHA. Choose a third-party-tested product.[6, 7]

Experimental

Emerging evidence — try last, only if curious.

Creatine Monohydrate (Ages 14+, with oversight)

3-5 g daily, anytime — ages 14+ only, coordinate with pediatrician
morningempty stomach

Creatine has reassuring safety data in adolescent athletes (Kreider 2017 ISSN position stand notes safety in adolescents 14+). Benefits include strength, power, and hydration support. Coordinate with parent, pediatrician, and coach before starting. NOT recommended under age 14 (limited data). Monohydrate form is the only one with substantive evidence — avoid the more expensive ''advanced'' forms.[8, 9, 10]

Warnings

Do not take with: NEVER combine teen supplements with adult pre-workouts, fat-burners, 'testosterone boosters,' weight-loss supplements, or prohormones. Several of these are explicitly banned in school athletics and some are dangerous to developing endocrine systems. Tetracycline/quinolone antibiotics with iron (space 2 hours). Thyroid medications. ANY prescription medications should be reviewed with prescriber before adding supplements.
Do not take if: CRITICAL: never supplement adolescent athletes with anabolic-adjacent products, testosterone boosters, or weight-loss supplements. Avoid creatine in children under 14 (insufficient data). Avoid adult pre-workouts entirely in teens (high caffeine, sometimes proprietary stimulant blends). Athletes with chronic conditions need pediatric sports medicine oversight. Teen athletes showing signs of disordered eating, RED-S (relative energy deficiency in sport), or extreme weight cutting need medical evaluation — NOT more supplements. If your teen is competing at NCAA, USADA, or WADA-tested levels, verify EVERY supplement is on the cleared list (NSF Certified for Sport).

Lifestyle improvements

Food intake is the foundation

The #1 most-common mistake in teen athlete nutrition is inadequate caloric intake. Growth + intense training has caloric needs in the 2500-4000+ kcal/day range. Under-eating produces declining performance, hormonal disruption, and injury risk.

Protein adequacy

1.2-1.6 g/kg body weight daily, distributed across meals. Protein at every meal (20-40 g) supports muscle protein synthesis and recovery.

Carbs around training

For teen athletes doing intensive training, carbs are not the enemy. 4-6 g/kg/day for moderate training, 6-8 g/kg/day for heavy training schedules. Whole-food sources preferred (rice, potatoes, oats, fruit) over processed alternatives.

Sleep — 8-10 hours

Teen athletes need MORE sleep than adults, not less. 8-10 hours is the right range. Many teen athletes are chronically sleep-deprived from school start times — this impairs recovery, growth, and performance significantly.

Hydration

Plain water plus electrolytes for sessions over 60 minutes. Sports drinks during prolonged training; not as everyday beverages.

Mental health matters

Teen athletes have higher rates of burnout, depression, and disordered eating than non-athletes. Open communication with parents, coaches, and pediatricians about mental health is non-negotiable. Don''t treat performance issues with more training and supplements when the root cause is exhaustion or burnout.

Periodize training and recovery

Year-round single-sport specialization in teens correlates with higher injury rates and earlier dropout. Multi-sport involvement, planned rest weeks, and offseasons matter.

Don''t cut weight aggressively

Aggressive weight cutting in teen athletes (wrestling, gymnastics, dance, certain combat sports) can have lasting consequences on growth, bone density, hormonal development, and eating patterns. If weight management is genuinely needed, work with a sports dietitian.

Annual labs for serious athletes

Ferritin, CBC, 25-OH vitamin D, B12, comprehensive metabolic panel yearly. Catches the silent issues before they impair performance.

Coach + Parent + Pediatrician communication

The best teen athlete outcomes come from coordinated communication. Don''t outsource all decisions to one party.

RED-S awareness

Relative Energy Deficiency in Sport — low energy availability producing menstrual disruption (in girls), reduced bone density, suppressed testosterone (in boys), and poor recovery. Increasingly recognized in adolescent athletes. Treatment is adequate caloric intake, not more supplements.

References

  1. Iron — supplement research overviewExamine.com link
  2. McClung JP, et al. Iron status and the female athlete. J Trace Elem Med Biol. 2012;26(2-3):124-126.PubMed link
  3. Sim M, et al. Iron considerations for the athlete: a narrative review. Eur J Appl Physiol. 2019;119(7):1463-1478.PubMed link
  4. Magnesium — supplement research overviewExamine.com link
  5. Schwalfenberg GK, Genuis SJ. The Importance of Magnesium in Clinical Healthcare. Scientifica. 2017;2017:4179326.PubMed link
  6. Fish oil — supplement research overviewExamine.com link
  7. Kuratko CN, et al. The relationship of docosahexaenoic acid (DHA) with learning and behavior in healthy children: a review. Nutrients. 2013;5(7):2777-2810.PubMed link
  8. Creatine — supplement research overviewExamine.com link
  9. Kreider RB, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017;14:18.PubMed link
  10. Jagim AR, et al. Common ingredient profiles of multi-ingredient pre-workout supplements. Nutrients. 2017;9(3):254. Reviewed in context of safety in adolescents.PubMed link

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Disclaimer: These statements have not been evaluated by the FDA. This protocol is educational, not a substitute for personalized medical advice. Talk to your doctor before starting any new supplement regimen — especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition. Last updated 5/20/2026.