In reply to Northernladlovesgravy:
Supplementation is made out to be a big deal. It's not. People talk it to death (and I'm going to do so as well, so apologies in advance for the long post) but really of far more concern is whether you are training effectively, eating well, and resting sufficiently. The amount of discussion supplementation gets, vastly outstrips its potential benefits.
That said there are a few supplements which do show consistent positive ergogenic effects, and creatine is one. The evidence for it is solid, with some caveats:
- those who benefit most are those with a dietary deficiency (it's found naturally in foods particularly red meat, salmon and tuna)
- the effects are statistically significant, but not huge - don't expect wonders
- a small increase in weight gain via water retention has been noted
- its efficacy seems to be limited to power-dependent activity
Here's the position stand from the Journal of the International Society of Sports Nutrition:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2048496/
So it's pretty safe, and it works - albeit individual response varies. But the questions for climbers surround the effects on power to weight. The research is pretty conclusive for most power-dependent sports, that is to say that creatine is generally beneficial, and thus supplementation outweighs (sorry!) the negatives.
I suspect this holds true for weight-categorised sports, and that any unwanted increases in bodyweight can be offset with appropriate strategies. Climbing is unique however in also depending hugely on finger strength, which may be affected disproportionately by increases in body weight.
Given creatine can affect both power and weight, its benefits for climbers in general are likely to remain unclear. Some may benefit, others won't. Logically, creatine will likely only be helpful if one is focusing on power and strength-dependent moves with long rest periods, rather than endurance activity.
On the plus side it is not ergolytic at all (not damaging to strength or power) and it's pretty cheap so there's no harm trying it for a bit, especially if your diet is low in creatine e.g. vegetarian diet. For you personally, WBO's points are spot on. Given your apparent technical level (similar to mine) you may benefit more from firstly learning to effectively use what power you have, than from increasing that power.