Hey Dev. Nice detail given… First, overall context. You’re cutting hard from a higher body fat, using retatrutide, and stacking multiple compounds that all tax recovery in different ways. In my opinion, the fatigue you’re feeling is not unusual at all. It’s almost always the calorie deficit plus the GLP drug plus high training stress. No stack fully cancels that out. On YK-11. Honestly, if I’m being blunt, YK-11 looks better on paper than it feels in real use at least for me and others I have engaged with. Even injected, I’ve seen it cause joint and tendon discomfort, flat energy, and a that heavy systemic fatigue. The myostatin angle sounds great, but in practice I don’t see a huge muscle-saving payoff, especially on a cut. Your dosing isn’t crazy, but if this were me, YK-11 would be the first thing I’d question or remove rather than push harder. On fatigue support. I wouldn’t spend money on SS-31 or MOTS-c expecting a big turnaround. In my experience, they’re expensive and subtle at best.. If fatigue is bad, I’d first look at carbs around training, sleep quality, and stimulant use. DMAA can help you perform for an hour, but it often worsens next-day fatigue. MK-677 helps sleep for some, but for others it adds grogginess. For me personally I take mk677 in the morning on an empty stomach and let the nighttime normal natural GH pulses happen during the night. But understandably that wont help with hunger and possible day time fatigue(although i still think thats more from the YK) Enclomiphene can also contribute to lowgrade tiredness. I’d simplify before adding more. On training intensity, this is the key part. I agree that you need a strong keep this muscle signal, but I don’t think living at RPE 9–9.5 on a cut is smart. What I’d do is keep one heavy top set on big lifts around RPE 8, occasionally touching 9, then slash back off volume hard. That’s where most fatigue really comes from. in the 7–8 range makes sense. The compounds don’t protect your nervous system or joints, so pushing near-max effort every session usually backfires after a few weeks.

@Dev P Honestly, I wouldn’t replace YK11 with another compound just to fill a gap. For muscle retention on a cut, the biggest drivers are training intensity, protein, and recovery, not adding something else that just brings more fatigue. If someone insists on keeping YK, splitting it into smaller, more frequent doses can be smoother, but in real world use it still tends to feel rough on joints and energy for a lot of people. That’s why I personally wouldn’t try to optimize it further while cutting. If I dropped YK, I’d keep things simpler instead of swapping it one for one… push carbs around training, keep one or two heavy top sets, cut back volume, and let the GLP plus deficit do their job (appetite control and fat loss). In my experience, that preserves more muscle long term than piling on another compound. I’d either drop YK11 entirely or accept its limits, not try to replace it with something that looks good on paper when you’re already cutting hard. 👍

At 17, patchy or thinning spots are more often genetics, stress, nutrition, or scalp conditions rather than something fixable with drugs alone. Oral minoxidil can help slow loss and thicken existing hair, but it will not cure the cause. Best short answer is see a dermatologist, get blood work if possible, address sleep, calories, iron, vitamin D, and scalp health, and avoid jumping into stronger meds this young unless a doctor confirms androgenic hair loss. I wouls even avoid minoxidil for various reasons (plus it stops working when you stop taking it) 🤜💥🤛

As Jim said. At 17, MK-677 is unlikely to do what most people hope. Height gains are very unlikely once growth plates are close to closing, and MK does not reliably reopen them. You might see increased appetite, water retention, fuller muscles from glycogen and water, and possibly better sleep, but not real new muscle tissue unless training and diet are already solid. Blood sugar can worsen, prolactin can rise, and edema, fatigue, and numb hands are common complaints, especially in younger users. The biggest con is that your natural growth hormone is already high at your age, so the upside is limited while the risks are more relevant. Long-term effects in teens are not well studied, and disrupting hormones this early can backfire. For most 17-year-olds, maximizing sleep, calories, protein, and progressive training will do more for height potential and muscle than MK-677, with far fewer downsides.

If I’m being honest, the first thing that jumps out is where is the testosterone.?? At 69, testosterone is not optional if you care about muscle, strength, recovery, mood, bone health, or fighting sarcopenia. Most men that age are already very low, and SARMs are suppressive on top of that. So you would likely be digging the hole deeper instead of fixing the foundation. You said you are not bothered about suppression but As you have not mentioned TrT or Test im assuming your missing the VITAL component! if you are on Test give the details and i’ll be able to analyze better for you.. if you’re not then Without TRT, adding SARMs is putting the cart before the horse. 🤜💥🤛

Hight cortisol (stress and or lack of deep sleep) plus the compounds.. MK677 will cause Lethargy by design… ease back and get other hormones in check with Vitamin B complex , high dose vit D3, magnesium and zinc 👊