May support muscle recovery and energy levels.
Effective Dose
500mg - 2g daily
Onset
Days
Cost
Budget
Cycle
Not required; can be taken consistently.
Why not higher?
7 things you need to know
What it does
May support muscle recovery and energy levels.
Worth it?
5/10. Isoleucine is an essential amino acid, important for protein synthesis. While crucial for overall health, its direct impact as a standalone supplement at typical doses is subtle. It may offer some benefit for muscle recovery, but its effects are often better realized through complete protein sources.
How much to take
500mg - 2g daily
Price
Cheap (under $15/month)
How fast it works
Builds up over days to weeks
Safety
Check if: individuals with kidney or liver disease, pregnant or breastfeeding women
What people say
Some users report feeling a slight increase in energy and improved muscle recovery after exercise. The effects are generally subtle.
First isolated from fibrin in 1903, a fibrous protein found in blood clots.
"Some users report feeling a slight increase in energy and improved muscle recovery after exercise. The effects are generally subtle."
Research backing for this ingredient
Some evidence, more research needed
Limited
Not yet
Generally accepted with some debate
"Isoleucine's role in protein synthesis and muscle metabolism is well-established. However, its efficacy as a standalone supplement, rather than as part of a complete protein source, is debated. Studies suggest potential benefits, but more research is needed at typical supplement doses."
Isoleucine is an essential amino acid that plays a role in building and repairing muscle tissue, regulating blood sugar, and providing energy. Supplementation may support these functions, especially during intense physical activity. However, it's usually more effective as part of a complete protein or BCAA supplement.
Products below minimum dose are likely ineffective
When
Any time
How
500mg - 2g daily
Food
Can be taken before, during, or after exercise to support muscle recovery.
Effects on muscle recovery and energy may be noticeable after several days of consistent use.
Not required; can be taken consistently.
Check for specific interactions.
Isoleucine is categorized as a amino acid.
Scientific consensus score: 6/10.
Evidence quality: WEAK.
Add Isoleucine to your stack analyzer or compare it with other ingredients.
Not medical advice. Always consult a healthcare provider.