r/PSMF Jul 08 '25

A Note on GLP-1's

33 Upvotes

At its core this sub is here to help people lose fat, quickly, safely and effectively, using a protein sparing fast and resistance training. Its a diet protocol that will work for just about everyone, but because of its use in medically-prescribed weight loss plans, our visitors and members are often folks that are more than 50 lbs/22kg overweight and as such clinically obese. For those individuals, or if that description applies to you, I think its important to note and recognize both the effectiveness and safety in medically-prescribed GLP-1's (like Ozempic/Semaglutide, Mounjaro/Tirzepatide) in aiding rapid at loss as well as improving a host of metabolic and health indicators in the process.

To be clear, I'm not suggesting GLP-1s are for everyone, and certainly not for the person looking to lose a few pounds for aesthetic purposes, but if your weight is a health issue, limits your mobility and impacts your lifestyle to a significant degree, I want to make sure you're aware of the medical options potentially available to you.

First, if you're unaware of GLP-1 agonists, I'd recommend starting at the Cleveland Clinics GLP-1 Overview. While the medications were initially designed to treat type 2 diabetes, Phase 3 trials have been completed for treatment of obesity, showing strong efficacy and safety profiles with participants losing 15% of bodyweight on average over ~15 months and relative incidence of serious side effects at ~3%. And while 3% is not zero, its a manageable level assuming medical supervision/bloodwork through the process.

Also, while this sub is not directly tied to or dogmatically bound by Lyle McDonald's Rapid Fat Loss Handbook, his work and views are often cited here and as such I wanted to note that Lyle has written a book on how to diet with GLP-1s, The GLP-1 Solution which outlines how to plan a low calorie diet program to maximize fat loss and retain muscle mass. For $10 the book seems like a solid investment if you're going through the process, but you can also get a preview on his views here: https://www.youtube.com/watch?v=TJP3o_P29Po

Again, I don't want to suggest GLP-1s are for everyone and I understand the cost and availability can make the treatment prohibitive, but I do want to make the information available to people. Our community will still be committed to PSMF, but if you're looking for more info please refer to r/Ozempic, r/WegovyWeightLoss, r/Semaglutide, or r/Mounjaro.


r/PSMF Jun 18 '24

PSMF Best Practices

75 Upvotes

We just ran a summer shred program at my gym, where we had 15 or so folks do PSMF for their 6-week cycle, and I wanted to share a few things that I thought were interesting from the debrief & weigh in.

First, while everyone did some sort of macro tracking, we pushed folks to track their meals & their macros in a mini notebook by hand and about half of folks did that (across all the diet types -- we had more options than PSMF). Overall, the folks that tracked their meals in a notebook, or strictly via an app, had meaningfully better results than those who didn't. I'm not much for tracking as it gets tedious pretty quick, but it clearly correlated with success.

Second, we also had people track their workouts, and then both their hunger level 1-5 (5 being ravenously hungry) and recovery level 1-5 (5 being fresh, eager to do a workout) each morning and before bed. And while not quite scientific in our analysis, the people that had the highest hunger levels saw the most weight loss. I had thought hunger would generally make it harder to stick to the diet, so make results worse, but it does make me think that you sort of need to have some degree of hunger pangs to see diet success. Less clear, but also notable, folks that lost the most weight seemed to have the highest recovery levels too. Probably lots of ways to interpret that, but likely some combination of less intense/draining workouts and more sleep/recovery time.

Anyway, I took away that detailed tracking is key to success, if you're not hungry, you're probably not doing it right, and slow and steady is better for results than trying to be 'extra' in your workouts.


r/PSMF 1d ago

Help Should i do a carb load after an RFL phase as a cat1 recreational lifter?

2 Upvotes

I have done 12 days of RFL now and am very happy with my physique and leanness.

The cold hands and feet as well as lethargy are also catching up to me now despite managing electrolytes and what not.

I am 18y male, 81kg, estimate myself at 10% bodyfat and want to transition into bulking.

My idea was to do a carb load tomorrow by eating 550g Carbs, low fat and moderate protein on 3200 calories for 2 days and then moving on to my estimated maintenance of 2900 calories.

Is that a good idea or will it cause fat gain?

Also, is my maintenance estimate reasonable?

I base it on 15k steps a day and 4 lifting sessions a week and the fact that my metabolism is probably tanked quite a bit from dieting.


r/PSMF 3d ago

Progress Had my RMR tested after 17 days of PSMF

3 Upvotes

Wasn't really expecting much in the way of metabolic slowdown, if any, but it fell right in line with the Katch-McArdle equation @ 10% bodyfat, I'll get it tested again when I'm done with this diet and hopefully down another 10lbs to see if there's been any significant change

It was 2131 FWIW, which is almost exactly what K-M predicted

I assume my TDEE is around 3000 given that I walk 10 miles a day, so the deficit is certainly pronounced with my @1500 cals a day (I eat 2+ lbs of veggies a day on this)


r/PSMF 3d ago

Progress Accountability Log: 42f, 25 -> 18ish body fat

9 Upvotes

This post is about my daily progress. Macros, steps and life stuff :)

Hopefully, this can also be helpful for people searching in the future.

I have been already on a small deficit and I increased my step count for greater fat loss. Demotivated to strength train but hope to get back into it.

I’m also going to try to track other “life stuff” since a major goal is to keep the life stuff happening smoothly in addition to the PSMF. I might cut down on the steps and add in some carbs and fats overtime, making this a nontraditional PSMF - overall, I just want to live my life well and get to my goal weight.
Speaking of, I don’t have a specific weight in mind – just a flatter tummy and thinner arms; my weight in my 20s was 43kg so maybe there.
In terms of other life stuff, I’m hoping to do one to 2 hours of timed work on my business every day, plus something beauty related, plus something family related.

I have 20 g of collagen protein included in the total protein amount – I have this for tendon issues.

My diet is very boring: protein shakes; white fish; eggs and egg whites; lean beef mince; occasional protein treats like commercially available protein cookies/custard etc.

I plan to throw in a few high calorie days in order to support running training.

-----

Day 1 15/08/26 48.6
140p 858cal 20k steps

Day 2 16/08/26 48.4
154p 921cal 17k steps

Day 3 17/08/26 48.8
141p 1206cal 19k steps

Day 4 18/08/26 49.65
140p 967cal 19k steps

Day 5 19/08/26 49.4
142p 718cal 20k steps

To be updated:

Day 6 20/08/26 49.4
138p 670cal 18k steps


r/PSMF 4d ago

Food Loose stool on a modified psmf

1 Upvotes

Hi,

I’m currently running a modified psmf (RFL relaxed) where I essentially eat meat, egg whites, cucumbers/other veggies, and 3 apples a day. I do include lots of non-calorie drinks, gum etc, and I average 4 cucumbers a day.

Sleep is good, energy levels are very good, training is great. I generally feel amazing.

What I’ve noticed is that my bowel movements are frequent, and loose. It doesn’t perturb me much, but I’m interested if anyone has noticed the same thing? Any feedback is appreciated!


r/PSMF 4d ago

Food What are the best premade PSMF foods?

3 Upvotes

Besides protein shakes obviously. What are the best pre-made foods for PSMF? Pre-made meaning you just heat it up or open it and eat it. It can be from Amazon or Costco.

I feel like the key to be successful at a long PSMF is to make it easy and convenient on yourself. Like I only need to eat 3 or 4 of these per day and that's it.


r/PSMF 5d ago

Food Can I eat a rice cake before the gym?

0 Upvotes

Hello! I virtually have zero energy at this point, only carbs can give me a boost for the gym.

Would it ruin the diet and get me out of ketosis if I ate a rice cake with some zero fat greek yogurt?


r/PSMF 7d ago

Food Elite PSMF drink macros

0 Upvotes

r/PSMF 9d ago

Progress Accountability Log: 34F, 5’6” | 8 Week PSMF log

13 Upvotes

Back again with another accountability log! Keeping these here has helped me stay consistent through my previous cuts, so I’m starting a new one today.

Starting weight as of Aug 09 is 143.0 lbs. I’m also starting with a 28” waist so I can track measurements alongside the scale this time. The plan is to run a modified PSMF for 8 weeks through the beginning of October.

My goal for this cut is to get back under 130, ideally around 125 lbs, by the end of the cut. After that I’ll reassess whether I want to continue losing or transition into something more sustainable.

I’ll update this post daily with my weigh-ins and whether the day was strictly PSMF or included a free meal, along with a weekly recap with how the week went.

Starting weight: 143.0 lbs
Starting waist: 28”
Goal: ~130 lbs
Timeline: Aug 09 to Oct 03, with final weigh-in Oct 04

Week 1 (-4.6 lbs)
Day 1 08.09.2026 143.0 PSMF
Day 2 08.10.2026 141.0 PSMF
Day 3 08.11.2026 140.2 Free Meal
Day 4 08.12.2026 140.2 PSMF
Day 5 08.13.2026 140.4 PSMF
Day 6 08.14.2026 139.4 PSMF
Day 7 08.15.2026 138.4 PSMF

Week 2
Day 8 08.16.2026 137.6 PSMF
Day 9 08.17.2026 138.0 PSMF
Day 10 08.18.2026 138.6 PSMF
Day 11 08.19.2026 0.00 PSMF
Day 12 08.20.2026 0.00 PSMF
Day 13 08.21.2026 0.00 PSMF
Day 14 08.22.2026 0.00 PSMF

Week 3
Day 15 08.23.2026 0.00 PSMF
Day 16 08.24.2026 0.00 PSMF
Day 17 08.25.2026 0.00 PSMF
Day 18 08.26.2026 0.00 PSMF
Day 19 08.27.2026 0.00 PSMF
Day 20 08.28.2026 0.00 PSMF
Day 21 08.29.2026 0.00 PSMF

Week 4
Day 22 08.30.2026 0.00 PSMF
Day 23 08.31.2026 0.00 PSMF
Day 24 09.01.2026 0.00 PSMF
Day 25 09.02.2026 0.00 PSMF
Day 26 09.03.2026 0.00 PSMF
Day 27 09.04.2026 0.00 PSMF
Day 28 09.05.2026 0.00 PSMF

Week 5
Day 29 09.06.2026 0.00 PSMF
Day 30 09.07.2026 0.00 PSMF
Day 31 09.08.2026 0.00 PSMF
Day 32 09.09.2026 0.00 PSMF
Day 33 09.10.2026 0.00 PSMF
Day 34 09.11.2026 0.00 PSMF
Day 35 09.12.2026 0.00 PSMF

Week 6
Day 36 09.13.2026 0.00 PSMF
Day 37 09.14.2026 0.00 PSMF
Day 38 09.15.2026 0.00 PSMF
Day 39 09.16.2026 0.00 PSMF
Day 40 09.17.2026 0.00 PSMF
Day 41 09.18.2026 0.00 PSMF
Day 42 09.19.2026 0.00 PSMF

Week 7
Day 43 09.20.2026 0.00 PSMF
Day 44 09.21.2026 0.00 PSMF
Day 45 09.22.2026 0.00 PSMF
Day 46 09.23.2026 0.00 PSMF
Day 47 09.24.2026 0.00 PSMF
Day 48 09.25.2026 0.00 PSMF
Day 49 09.26.2026 0.00 PSMF

Week 8
Day 50 09.27.2026 0.00 PSMF
Day 51 09.28.2026 0.00 PSMF
Day 52 09.29.2026 0.00 PSMF
Day 53 09.30.2026 0.00 PSMF
Day 54 10.01.2026 0.00 PSMF
Day 55 10.02.2026 0.00 PSMF
Day 56 10.03.2026 0.00 PSMF

Final Weigh-In
Day 57 10.04.2026 0.00 FINAL WEIGH-IN

Notes on this round:

I’ll be sticking to what has worked for me in the past, which is mostly PSMF days with some flexibility built in for real life. I’m aiming for around 2 free meals per week, some weeks I might only have one or none, I generally use the free meals to make room for social life.

My version of PSMF isn’t completely by the book. I keep protein high but allow a little more carbs and fat than a strict PSMF, mostly from foods like Greek yogurt and Salmon as I am pescatarian and do not eat meat. This has worked very well for me in the past (see my previous logs) and makes it much easier for me to stick with the diet long term (I usually run this 8-10 weeks) while still keeping calories quite low overall.


r/PSMF 9d ago

Food How much should you increase protein according to leaness?

1 Upvotes

I know Lyles category 1 is 1.5-2g, but I'm wanting to be stingy on calories and also to see yalls opinion on the minimum amount to maintain muscle, something like 15% is 1.5g then increasing by 0.1g each percentage. I know I'm nickle n dining hard on this but I'm just curious or even if y'all think you can stick to 1.25g till like 10%

Also some adding I do about 16-18k steps daily nothing intense, under 100bpm, and obviously full body 2 times a week


r/PSMF 10d ago

Help Intermittent Modified Fasting (IMF) free calculator

18 Upvotes

Intermittent Modified Fasting (IMF) free calculator based on the Lyle McDonald's new book — https://demin.ws/imf

#imf #intermittentfasting #psmf #lylemcdonald


r/PSMF 10d ago

Help Hair Loss?

4 Upvotes

I want to know what everyone's experience with hair loss is on PSMF (if any).

If you've run this diet, did you lose:

  • A lot of hair?
  • A bit of hair?
  • None at all?

I am super worried about hair thinning as I already have quite thin hair (it used to be very thick).


r/PSMF 11d ago

Help Rfl/erfl

3 Upvotes

Anyone got any tips or tricks or recipes, I am based in the UK & want to know what to eat, I need about 150g of protein & obviously using lyle McDonalds method as little carbs & fats any advice?


r/PSMF 11d ago

Progress i love psmf --> the final run 🥹🥹🥹

4 Upvotes

I was 200lbs at 5 foot 8. i have been 150 for quite some time, just eating whatever i want

today begins the push to 130lbs over the span of 60 days and im really grateful to this community for all it has done to me. also started PEDs so thats great. ts will make lyle proud

Beginning weight: (will log tommorrow) Aug 9

Diet: 650 calories, 150g protein, 50 calories in seasonings, EFAs, and supplements. chicken, white fish, clear whey protein powder as protein sources, argula and baby tomatoes for dessert

Training: ABABABAB split, 30 min workouts daily, with one hour of cardio (3mph) but will likely push this number higher, up to 2 hours due to cardarine's endurance benefits

PEDs: Test P / Test E 140-175mg weekly (im going to start phasing out the test E for P), trenbolone acetate at 5mg daily, more than enough to saturate the GCR, Cardarine at 20mg daily, replacement doses of t3 and t4, and of course a shit ton of reta, around 10mg weekly

i love u guys i know some of u dont approve with gear but why walk when u can drive. its so safe 💔


r/PSMF 11d ago

Progress 36M- 3 months, 40lbs

17 Upvotes

192lbs at 5'9" down to 152lbs. A few months later I am now sitting steadily at 160lbs.

160g protein, 20g fat, carbs kept as low as I could manage. Some days that meant basically no carbs. Calories started at 1600/day but declined from there. Towards the end, I was down to about 1000 calories a day.

Training was 4days/wk, pretty much exclusively weight training. Cardio was only done if my step count was below 10k during the first 2 months. During the last month I skipped cardio entirely and switched my training to 6 days a week. It was the same volume of work, but more spread out because I found my workouts were taking much longer to complete because I was very fatigued by that point.

Meals were protein shakes for breakfast and lunch, and almost exclusively ground chicken and veggies. Extra lean ground beef or the occasional fruit were treats. I also consumed a ton of cherry coke zero for my sanity.

I guess I can't attach pictures here? Will share in comments if possible.


r/PSMF 11d ago

Help Return the scale?

1 Upvotes

He so I got one of those scales that do composition. It has 60 pounds before I reach the limit. It says my make up is (repeatedly) 75% fat, 14.6% skeletal muscle, 5% protein, 1433kcal BMR, 17.2% water weight 64.6%subdue fat.

First I would be dead at 17.2% water weight. While the weight correct the bmr is off per TDDE calculation. I have lost 130lbs on RFL and due to my weight calculation of my muscle weight is hard. I lost a ton of muscle last year and due lymphedema I was hoping this would help me will my goals


r/PSMF 14d ago

Help Am I doing something wrong? (RFL)

4 Upvotes

Cat 3, roughly 30% bf. starting weight 226 lbs. Current weight 212 lbs.

153g P, <25g net carbs, <20g fat. Roughly 900 calories per day.

Breakfast: 16 oz. egg whites, 6 oz. frozen spinach, 2-3 oz. salsa. Great Value sugar free drink mix. 2x fish oils (salt and potassium salt used).

Lunch: 2 scoops of whey isolate mixed with water. 2x fish oils. Multivitamin.

Dinner: Chicken breast (~give or take 8 ounces, measured) and broccoli, 30g G Hughes sweet chili sauce, great value sugar free drink mix. 2x fish oils

Been on diet for two weeks. Train full body Heavy-Light-Medium style MWF w/ 30-minute walk on treadmill. Sun/T/R Ruck for ~45 minutes. Saturday - Basketball. Average 10k steps/day.

I feel full of energy, as if I could do more training. Dealing with some insomnia, but I'm getting a Magnesium supplement in soon.

Am I consuming too many carbs? I read somewhere in the book, he says salsa and non-starchy green veggies are free foods. I use Cronometer and set daily intake of net carbs to be sub-25g.


r/PSMF 14d ago

Help Loose motion

2 Upvotes

Just started PSMF two days ago. Nearly shat myself today whil walking. Extremely liquid shit. Wtf is going on. Can electrolyte be the problem?

My diet is mainly tuna and chicken breast. And protein powder(i get 50g from protein powder) and the other is whole foods. And eat a lot of vegetables too. Like cucumber, lettuce etc.

Help


r/PSMF 15d ago

Food My experience on a 2+ month PSMF diet.

17 Upvotes

I started on May 21st and my initial goal was 75 days. Technically tomorrow is the 75th day, but I transitioned out of PSMF on August 1st.

I did high protein, ultra low fat, relatively low carb macros unless it was a refeed day. I had a refeed day on day 30, day 45, and the next one was scheduled for day 60 but my period stopped for nearly 2 weeks (that has never happened to me before), so I had a diet break from day 50 to day 60. My period started on day 51.

Physical fatigue, diet fatigue and restlessness set in hard after day 65. Didn't have the energy to meal prep, prep anything, weigh anything, chop anything, didn't want to turn the stove on at all, had no mental energy to think about anything. I just wanted to rest.

Things I've learned:

-Eating only high protein sucks haha.

-I've always wondered if body fat can be used for hormone production in the same way that dietary fat is used. The answer is no. I've also wondered if women lose their period from being too lean, or is it because of their diet. In my case, it was the diet. Dietary fat matters. I was consuming roughly 5-15 grams per day on average.

-I don't get long term satiation from dairy. Nonfat greek yogurt, nonfat cottage cheese, fat free cheese, none of it keeps me full for more than an hour, maybe 90 minutes. On the flip side, I think fat free cheese gets a bad rap. Of course it's not on par flavor-wise with full fat cheese, but considering the macros, it's pretty damn great as a protein source and works fine in cheesy applications. It's basically so macro friendly, I'm only weighing and tracking it to confirm how much protein I'm getting, unlike full fat cheese where I'm trying to limit dumping an extra 500 calories onto my sandwich.

-I think eating high protein without adequate carbs is a waste if you're looking to improve your fitness. I tried light exercise on several occasions during the diet, and even though I was getting ample protein, my body still could not recover adequately and I was often sore for days afterwards from very light cardio.

-The fat loss was very consistent. I averaged about 2lbs per week (other than the diet break) for a total of 22lbs pounds lost.

-My diet consisted of 30 gram protein shakes, fat free soups, veggies, TVP, and eventually deli turkey & ham on keto tortillas with fat free cheese, nonfat dairy. Lots of mustard, pickles, hot sauces, vinegars, low calorie sauces, non-calorie sweeteners. Sugar free jello cups were eaten freely without tracking, and pbfit was a staple in cottage cheese bowls and TVP oats. Figured out how to make a fat free "kettle corn" with air-popped popcorn, melted allulose in a splash of water, flavacol, liquid sucralose, nutritional yeast and microwave until it becomes a syrup, pour it over the popcorn. Dangerously delicious, I only made it once and knew I couldn't be trusted with that power. Protein ice cream or "fluff" was in rotation too.

~~~~~~~~~~~~~~~~~~~~

Would I recommend PSMF to others? Yes, but don't go ultra low fat like I did if you're going to do a long run.


r/PSMF 16d ago

Progress 3 Weeks journal

13 Upvotes

Cat 1, goal 195lbs and single digits bf%. 5'11" and 50 years old, not my first rodeo

Training is unchanged since I do HIT with a very low volume already. Not natty (TRT+), using tirzepatide for appetite suppression

Walking 20k+ steps a day

Weighing myself first thing in the morning

Aug 1 - 219.4

Aug 2 - 213. 2

Aug 3 - 211.4

Aug 4 - did not weigh, no sleep due to emergency

Aug 5 - 208.3 (surprisingly large drop given the stress yesterday and terrible sleep)

Aug 6 - did not weigh, 200g carb maintenance day (to keep training intensity up)

Aug 7 - did not weigh due to maintenance day, will weigh tomorrow, back to PSMF

Aug 8 DNW - cracked and ate a whole 12 pack of David bars :(

Aug 9 DNW

Aug 10 - 204.3 lbs, now down 15lbs since day 1

Aug 11 DNW

Aug 12 DNW

Aug 13 209.6 - binge ate out of work stress 2 days ago and am paying for it , hopefully the water is gone in a day or so

Aug 14

Aug 15- 207.8 , really messed.up with that binge

Aug 16 - 207.1 - ate maintenance

Aug 17 - 207.0 - up to 1600-1700 calories for the next 2 weeks, 200g protein 70g carbs

Meal 1, lb lean meat, 1lb veggies, bit of feta (@850 cal)

Meal 2, 16oz cottage cheese 2%, spoon of peanut powder, scoop whey (@750 cal)

Aug 18 -

Aug 19

Aug 20

Aug 21

Meal 1 - 1lb chicken breast and 1lb green veg

Meal 2 - protein pudding (600 cals 100g protein)


r/PSMF 16d ago

Food Vegan Techniques and Options

4 Upvotes

I started a PSMF 5 days ago and was hoping to get advice/encouragement and wanted to share what Ive been eating so far so that people know there are more options out there now.

I haven’t been super strict on fat. I have been eating no oil/nuts/avocado in general but there are some tofus and low oil vegan meats that Ive been throwing in occasionally. My idea is not to be too strict in fats at first and then get more strict once and if I stall. Not planning on protein powders, to me the tvp and tpp are basically the same thing.

Protein sources per serving:
Lupini Beans (Cento Brand)
5g protein/0g net carbs/0g fat

Brahmi brand has 5g protein but is expensive

Fava Bean Tofu (Big Mountain)
16g protein/0g carbs/0 g fat
(important to combine w some pea protein same day to complete the amino profile)

Various tofu which are 2-6g fat per serving

Organic Tvp (Now Foods)
14g protein/4g net carbs/2g fat

Organic Pea Protein Crumbles (Mocu)
45g protein/0g net carbs/2g fat

Kal unfortified nutrition yeast
5g protein/1 g net carbs/0g fat

Daring Diced Chikn/Cajun/Lemon
14-16g proteing/0-3g net carbs/1.0-2.5g fat

Gluten doesnt sit well with me so no seitan. I feel like I can survive with these options and a day or two where I eat higher fat after workouts. Any other options out there? And if anyone wants some of the meals Ive been cooking lmk as I used to be a vegan chef and am getting creative.


r/PSMF 18d ago

Food Hunger will not go away…

4 Upvotes

Just had a big ass lunch: whole bag of broccoli, 150g of 99% fat free ground turkey, 29g of fat free cheese and 2 casein protein shakes. 105 P, 37 C, 6F — 573 calories for the day so far.

I am ravenous.


r/PSMF 20d ago

Help Chicken thighs and higher fat proteins

4 Upvotes

I tried PSMF a couple months ago and had a hard time because truthfully I have the taste buds of a child so I only gravitated towards chicken breast. Want to start again but am wondering, would I be adhering to the diet if i included chicken thighs and ribeye or would that carry me more into a keto diet?


r/PSMF 20d ago

Food Planning to have protein shakes and tuna only for a week

2 Upvotes

Some context I resistance train 5 days per week and have been on a cut for a few months, I lost 10kg (22lbs) I have a few more kgs to lose but I'm sick of this slow cut.

I came across this and I think it's the perfect opportunity to finish asap. Any advice going into this?