SUPPLEMENT GUIDE (EVIDENCE-BASED ONLY)

The sports supplement industry is enormous, and the vast majority of products marketed to fighters and athletes have little or no scientific evidence supporting their effectiveness. This guide focuses exclusively on supplements with robust, replicated research demonstrating real benefits for combat sports athletes. Everything else — the testosterone boosters, the fat burners, the proprietary blends with fancy marketing — is a waste of money at best and potentially harmful at worst.

Creatine monohydrate is the single most researched and consistently effective sports supplement available. It works by increasing the body's stores of phosphocreatine, which is used to regenerate ATP (the primary energy currency) during short, high-intensity efforts like explosive strikes, scrambles, and bursts of clinch work. Supplementing with creatine has been shown to improve power output by 5 to 10 percent, increase work capacity during repeated high-intensity efforts, and support lean mass gains during resistance training. The standard dosing protocol is 3 to 5 grams of creatine monohydrate per day, taken consistently. Loading phases (20 grams per day for 5 to 7 days) saturate stores faster but are not necessary — daily dosing reaches the same saturation within three to four weeks. Creatine causes water retention in muscle cells, typically adding 1 to 3 kilograms of body weight. This is intracellular water, not bloating, and it is actually beneficial for performance. However, fighters approaching weigh-in may choose to discontinue creatine one to two weeks out to facilitate the water cut. Creatine monohydrate is the only form you need — fancy variants like creatine ethyl ester, buffered creatine, or creatine hydrochloride offer no advantages despite costing more.

Caffeine is a powerful ergogenic aid that improves alertness, reaction time, perceived effort, and endurance performance. For Muay Thai, the benefits to reaction time and reduced perceived effort are particularly valuable during hard sparring and fight situations. The effective dose is 3 to 6 milligrams per kilogram of body weight, consumed 30 to 60 minutes before training or competition. For a 70-kilogram fighter, this translates to 210 to 420 milligrams — roughly two to four cups of coffee. Start at the lower end to assess tolerance, as excessive caffeine causes jitteriness, anxiety, and increased heart rate that can impair fine motor control. Regular caffeine users develop tolerance and may need to cycle off periodically (one to two weeks) to restore sensitivity. Caffeine has a half-life of approximately five to six hours, so avoid consuming it within eight hours of bedtime to protect sleep quality, which is itself critical for recovery.

Branched-chain amino acids (BCAAs) — leucine, isoleucine, and valine — are heavily marketed to athletes but their practical value is limited for most fighters. If your total daily protein intake is adequate (1.6 to 2.2 grams per kilogram), you are already consuming sufficient BCAAs through whole food and protein powder sources. Supplemental BCAAs may have a narrow application for training in a fasted state, where they can reduce muscle protein breakdown, but the evidence is modest and eating a protein-containing meal would be more effective. Save your money unless you specifically train fasted and cannot tolerate a protein shake beforehand.

Beta-alanine is a non-essential amino acid that increases muscle carnosine levels, which buffers lactic acid accumulation during high-intensity exercise. For Muay Thai, where three to five minute rounds of continuous high-intensity striking create significant lactic acid buildup, beta-alanine supplementation (3.2 to 6.4 grams per day, divided into multiple doses to minimize the harmless but uncomfortable tingling sensation called paresthesia) may improve work capacity in the later rounds of training and competition. The research is reasonably strong, though effects are modest — roughly 2 to 3 percent improvement in exercise lasting one to four minutes.

Omega-3 fatty acids from fish oil (EPA and DHA) support recovery through anti-inflammatory effects, improve joint health, and may support brain health — a relevant consideration for combat sports athletes. Aim for a combined 2 to 3 grams of EPA and DHA per day from fish oil supplements or fatty fish consumption. Look for third-party tested products to ensure purity and accurate labeling.

Vitamin D is not traditionally considered a sports supplement, but deficiency is extremely common, particularly in fighters who train primarily indoors. Low vitamin D is associated with increased injury risk, impaired immune function, and reduced muscle strength. Get your levels tested, and if below 75 nanomoles per liter (30 nanograms per milliliter), supplement with 2,000 to 5,000 IU of vitamin D3 daily until levels normalize.

Supplements that do NOT work despite marketing claims: testosterone boosters (tribulus, fenugreek, D-aspartic acid), glutamine for muscle recovery (redundant if protein intake is adequate), BCAAs when protein intake is already sufficient, CLA for fat loss, and any proprietary blend that hides ingredient doses behind trademarked names.