Also known as: Hemp seed protein, Cannabis sativa protein, Hemp protein powder
Muscle & RecoveryEmerging evidence
A whole-food protein from hemp seeds, lower in protein and higher in fibre than the isolates. Better understood as a nutritious food than as a protein supplement.
Typical dose
30.0–50.0 g per day
Any time; better used in food than as a shake
What it is
Hemp protein is made by pressing the oil from hemp seeds and milling what remains. It contains no meaningful THC and has no psychoactive properties, which is the first question most people have.
Protein content is typically 50 per cent or lower, considerably below pea or rice isolates. The remainder is largely fibre and residual fat, including omega-3 and omega-6 fatty acids in a favourable ratio.
That composition is the whole story. Hemp is less efficient as a protein supplement and more interesting as a food, contributing fibre and fats alongside the protein. Judging it purely on protein per scoop misses the point, but so does buying it expecting whey-equivalent performance.
How it works
Hemp supplies all nine essential amino acids, though lysine is low enough that it is functionally limiting, similar to rice protein.
Leucine content is around 6 to 7 per cent, lower than pea, rice or soy, which means a larger serving is needed to reach the threshold that triggers a full muscle protein synthesis response.
Digestibility is also somewhat lower than for the isolates, partly because of the fibre content. The fibre is a genuine nutritional positive and a genuine drawback for protein delivery, and both things are true at once.
What the evidence shows
There is very little research on hemp protein specifically for muscle outcomes, certainly nothing comparable to the trials on whey, soy, pea or rice.
What can be said with confidence follows from its composition: lower protein content, lower leucine and lower digestibility all mean it is less efficient per gram than the isolates for muscle purposes.
Where it earns its place is as a nutrient-dense addition to food, supplying fibre and fatty acids alongside protein. If muscle is the goal, pea, soy or a pea and rice blend are the better choices, and that is a straightforward assessment rather than a criticism of hemp as a food.
Dosing
Because protein content is around 50 per cent, a 30 g scoop supplies roughly 15 g of protein. To reach a meaningful protein serving you need considerably more powder than with an isolate.
If using it for muscle purposes, aim for servings supplying 30 g or more of protein, which means a large amount of powder and a substantial fibre load with it.
Hemp works better blended into porridge, smoothies or baking than taken as a shake. The taste is earthy and nutty, and the texture is grainy. Used as a food ingredient rather than a protein drink, it is a genuinely good product.
At a glance
Common forms
Hemp protein powder (50%), Hemp protein concentrate, Hulled hemp seeds, Within plant protein blends
Half-life / duration
Slower than isolates due to fibre content
Timing
Any time; better used in food than as a shake
Competition status
Permitted — not on the WADA Prohibited List
Category
Muscle & Recovery
Safety and side effects
Hemp protein is a food and is well tolerated. The high fibre content is the main practical consideration and can cause bloating or loose stools at larger servings, particularly if you are not used to that much fibre.
It contains no meaningful THC and will not cause intoxication. Whether trace amounts could affect a drug test is a reasonable question for anyone subject to testing, and the honest answer is that reputable products test for it and you should ask.
Build the serving up gradually rather than starting large, and drink adequate fluid alongside it as with any fibre.
Who should avoid it
Build servings up gradually given the fibre content. Anyone subject to drug testing should ask their supplier for THC testing documentation. Speak to your doctor about protein intake if you have been told your kidneys are not working normally. Avoid if sensitive to hemp seed.
This entry is provided for information only. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Consult a qualified healthcare professional before use if you are pregnant, breastfeeding, taking medication or under medical supervision.
