Klean Essential Aminos + HMB by Klean Athlete

Cutting calories for a race weight or rebuild after a layoff is when an HMB supplement with essential amino acids earns its keep. It helps athletes in heavy training blocks, adults over 40 noticing slower recovery, and anyone who struggles to hit daily protein targets. If your Vitamin D, 25-Hydroxy is in the lower range, the 500 IU here is light maintenance, not a repletion dose. For strict plant-based eaters, this is a practical way to get the full essential amino acid spectrum without whey.

HMB (a leucine metabolite) slows muscle protein breakdown and helps muscle cells stay intact during hard training or immobilization. Essential amino acids are the actual building blocks for new muscle protein, and the leucine-rich blend here helps flip the muscle-building switch after exercise. Vitamin D3 and calcium support muscle contraction and function, while glutamine is a fuel for immune and gut cells that can dip with high-volume training. The net effect is better retention of lean mass and steadier recovery.

Mix one scoop in water once or twice daily. Twice daily delivers 3 g of HMB, the evidence-based total used to preserve lean mass and reduce soreness within 2 to 4 weeks. Take around training or between meals, especially when a workout lands far from a protein-rich meal. If you already use whey or a high-protein meal post‑workout, take this at a different time of day to keep amino acid availability high.

HMB pairs well with creatine monohydrate if strength or power is the goal. Space this at least 2 hours from levothyroxine, tetracycline or quinolone antibiotics, or bisphosphonates, since calcium can reduce their absorption. If you have a history of high calcium, recurrent kidney stones, sarcoidosis, or advanced kidney disease, talk to your clinician first. People using levodopa for Parkinson’s should avoid taking amino acids at the same time, as they compete for absorption.