Thank you!
Your email is being processed.
Exercise recovery, Muscle protein synthesis, Hydration and electrolytes
Active adults seeking convenient essential amino acids around training or those with low protein intake looking for practical intra or post‑workout support.
Mix 1 serving in 8–10 fl oz of water and shake well; take 2 servings per day, ideally around workouts or between meals. Flavoured amino powders are often well tolerated with food or during training; sip with extra water to support hydration.
Zero sugar; Phenylketonurics: Contains phenylalanine.
Leucine activates the mTOR pathway, which may stimulate muscle protein synthesis after exercise.
Caution: High doses on an empty stomach may cause gastrointestinal discomfort; balance with other essential amino acids for regular use.
Isoleucine is used by muscles for energy and may support glucose uptake during and after exercise.
Caution: Large single doses may cause stomach upset; individuals monitoring blood sugar should be mindful.
Valine competes with tryptophan for transport across the blood–brain barrier, which may help reduce perceived exertion and support muscle protein turnover.
Caution: Excess intake may cause digestive discomfort; maintain adequate hydration.
Threonine contributes to protein structure and is a precursor for glycine and serine, which may support collagen and muscle protein formation.
Caution: Very high intakes may cause gastrointestinal upset; keep within labelled serving sizes.
Lysine is required for new protein formation and assists carnitine synthesis, which may aid amino acid utilisation in muscles.
Caution: May cause digestive discomfort in sensitive individuals; take with water and do not exceed suggested use.
The BCAAs leucine, isoleucine and valine may drive muscle protein synthesis and provide workout energy support. Threonine and lysine supply additional essential building blocks to complete protein formation, complementing the BCAAs for balanced amino availability.
Label Warning: For healthy adults aged 18 and over only. Do not use if pregnant or breastfeeding. Seek advice from a licensed healthcare professional before use, especially if you take medicines or have a medical condition. Stop use 2 weeks before surgery. Use only as directed.
Who should be cautious: People with phenylketonuria should avoid due to phenylalanine content. Those sensitive to sweeteners such as sucralose or acesulfame K may prefer caution. People on serotonergic medicines such as SSRIs, SNRIs, or MAOIs should be cautious due to L‑tryptophan. Consult a healthcare provider before combining with medicines that may interact.
Storage: Store in a cool, dry place.
This product is guaranteed authentic and backed by our easy returns and refunds policy. Details
Whey protein provides a complete amino acid profile, supporting muscle recovery and growth when combined with EAAs. This synergy may enhance workout results and overall protein intake.
AI generated. Not medical advice.
Sorry, there was a problem adding this item to basket. Please refresh the page and try again.
The Official Recovery Brand of Champions.
Faster recovery is the key to better results. For over 15 years, XTEND® has been making the best recovery products in the world. Powered by essential amino acids, including branched-chain amino acids (BCAAs), XTEND® EAA drives both muscle recovery and growth so you can achieve your goals today and prepare for tomorrow. It is also a great support option for those consuming GLP-1 products, helping with muscle retention and hydration.
When to take XTEND® for best results:
^Per serving.
‡Based on IRI Total U.S. Multi-Outlet Data for cumulative USD retail sales, measured in RSP, from 2018 to present.
As a dietary supplement, mix 1 serving in 8-10 fl. oz. of water (adjust for taste preference) and shake well. For best results, take 2 servings per day.
Citric acid, natural flavours, malic acid, acesulfame K, sucralose, silicon dioxide, turmeric extract (colour), calcium silicate.
Phenylketonurics: Contains phenylalanine.
using strategically sourced foreign and domestic ingredients and components.
This product is only intended for healthy adults, 18 years of age or older. Do not use if pregnant or breastfeeding. Consult with a licensed, qualified, healthcare professional before taking this or any food supplement product, especially if you are taking medicine or have a medical condition. Discontinue 2 weeks prior to surgery. Use only as directed. Do not use if safety seal is broken or missing. Store in a cool, dry place. Keep out of reach of children.
Minimum fill line after settling. This product is sold by weight, not volume. The density of the powder varies, and significant settling of powder may occur during shipping and handling. This product contains the servings indicated when measured by weight.
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally be despatched with alternative packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and do not rely solely on the information provided by iHerb. This website has been machine translated as a courtesy to customers. iHerb does not represent or warrant that the translations are complete or error-free and iHerb is not responsible for any translation errors or omissions.
| Supplement information | ||||
| Serving Size:8.4 g (Approx. 1 Scoop) | ||||
| Servings Per Container:40 | ||||
| Amount per serving | %Reference Intake | Amount Per 2 Servings | %Reference Intake | |
| Calories+ | 25 | 50 | ||
| Total carbohydrates | <1 g | 0%* | 1 g | <1%* |
| Total sugars | 0 g | 0 g | ||
| Contains 0 g Added Sugars | 0%* | 0%* | ||
| Sodium (as pink Himalayan sea salt) | 150 mg | 7% | 300 mg | 13% |
| Potassium (as Potassium Chloride) | 120 mg | 3% | 240 mg | 5% |
| Xtend® EAA Amino Blend | 5 g | ** | 10 g | ** |
| L-Leucine | 1.5 g | 3 g | ||
| L-Isoleucine | 750 mg | 1.5 g | ||
| L-Valine | 750 mg | 1.5 g | ||
| L-Threonine | 750 mg | 1.5 g | ||
| L-Lysine Hydrochloride | 650 mg | 1.3 g | ||
| L-Arginine | 250 mg | 500 mg | ||
| L-phenylalanine | 200 mg | 400 mg | ||
| L-tryptophan | 100 mg | 200 mg | ||
| L-Histidine | 25 mg | 50 mg | ||
| L-Methionine | 25 mg | 50 mg | ||
| *Percent Reference Intakes (RI) based on a 2,000 calorie diet. **Reference intake not established. +Calories calculated by Atwater method (i.e. 4 calories for carbohydrates, 4 calories for protein, 9 calories for fat.) in accordance with Federal food labelling regulations. Use of an alternatively acceptable method, as provided in the regulations for determining calorie content, may provide different results. | ||||
